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e6445719 | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
e6445719 PS |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
2235ad1c JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
e6445719 PS |
21 | #include "flow.h" |
22 | #include "datapath.h" | |
23 | #include <linux/uaccess.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
28 | #include <net/llc_pdu.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/jhash.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/llc.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/in.h> | |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/ip.h> | |
38 | #include <linux/ipv6.h> | |
39 | #include <linux/sctp.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/udp.h> | |
42 | #include <linux/icmp.h> | |
43 | #include <linux/icmpv6.h> | |
44 | #include <linux/rculist.h> | |
f5796684 | 45 | #include <net/geneve.h> |
e6445719 PS |
46 | #include <net/ip.h> |
47 | #include <net/ipv6.h> | |
48 | #include <net/ndisc.h> | |
25cd9ba0 | 49 | #include <net/mpls.h> |
614732ea | 50 | #include <net/vxlan.h> |
e6445719 PS |
51 | |
52 | #include "flow_netlink.h" | |
53 | ||
81bfe3c3 TG |
54 | struct ovs_len_tbl { |
55 | int len; | |
56 | const struct ovs_len_tbl *next; | |
57 | }; | |
58 | ||
59 | #define OVS_ATTR_NESTED -1 | |
982b5270 | 60 | #define OVS_ATTR_VARIABLE -2 |
81bfe3c3 | 61 | |
a85311bf PS |
62 | static void update_range(struct sw_flow_match *match, |
63 | size_t offset, size_t size, bool is_mask) | |
e6445719 | 64 | { |
a85311bf | 65 | struct sw_flow_key_range *range; |
e6445719 PS |
66 | size_t start = rounddown(offset, sizeof(long)); |
67 | size_t end = roundup(offset + size, sizeof(long)); | |
68 | ||
69 | if (!is_mask) | |
70 | range = &match->range; | |
a85311bf | 71 | else |
e6445719 PS |
72 | range = &match->mask->range; |
73 | ||
e6445719 PS |
74 | if (range->start == range->end) { |
75 | range->start = start; | |
76 | range->end = end; | |
77 | return; | |
78 | } | |
79 | ||
80 | if (range->start > start) | |
81 | range->start = start; | |
82 | ||
83 | if (range->end < end) | |
84 | range->end = end; | |
85 | } | |
86 | ||
87 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
88 | do { \ | |
a85311bf PS |
89 | update_range(match, offsetof(struct sw_flow_key, field), \ |
90 | sizeof((match)->key->field), is_mask); \ | |
91 | if (is_mask) \ | |
92 | (match)->mask->key.field = value; \ | |
93 | else \ | |
e6445719 | 94 | (match)->key->field = value; \ |
e6445719 PS |
95 | } while (0) |
96 | ||
f5796684 JG |
97 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
98 | do { \ | |
a85311bf | 99 | update_range(match, offset, len, is_mask); \ |
f5796684 JG |
100 | if (is_mask) \ |
101 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ | |
a85311bf | 102 | len); \ |
f5796684 JG |
103 | else \ |
104 | memcpy((u8 *)(match)->key + offset, value_p, len); \ | |
e6445719 PS |
105 | } while (0) |
106 | ||
f5796684 JG |
107 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
108 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ | |
109 | value_p, len, is_mask) | |
110 | ||
a85311bf PS |
111 | #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \ |
112 | do { \ | |
113 | update_range(match, offsetof(struct sw_flow_key, field), \ | |
114 | sizeof((match)->key->field), is_mask); \ | |
115 | if (is_mask) \ | |
116 | memset((u8 *)&(match)->mask->key.field, value, \ | |
117 | sizeof((match)->mask->key.field)); \ | |
118 | else \ | |
f47de068 PS |
119 | memset((u8 *)&(match)->key->field, value, \ |
120 | sizeof((match)->key->field)); \ | |
f47de068 | 121 | } while (0) |
e6445719 PS |
122 | |
123 | static bool match_validate(const struct sw_flow_match *match, | |
05da5898 | 124 | u64 key_attrs, u64 mask_attrs, bool log) |
e6445719 PS |
125 | { |
126 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
127 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
128 | ||
129 | /* The following mask attributes allowed only if they | |
130 | * pass the validation tests. */ | |
131 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
132 | | (1 << OVS_KEY_ATTR_IPV6) | |
133 | | (1 << OVS_KEY_ATTR_TCP) | |
5eb26b15 | 134 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
e6445719 PS |
135 | | (1 << OVS_KEY_ATTR_UDP) |
136 | | (1 << OVS_KEY_ATTR_SCTP) | |
137 | | (1 << OVS_KEY_ATTR_ICMP) | |
138 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
139 | | (1 << OVS_KEY_ATTR_ARP) | |
25cd9ba0 SH |
140 | | (1 << OVS_KEY_ATTR_ND) |
141 | | (1 << OVS_KEY_ATTR_MPLS)); | |
e6445719 PS |
142 | |
143 | /* Always allowed mask fields. */ | |
144 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
145 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
146 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
147 | ||
148 | /* Check key attributes. */ | |
149 | if (match->key->eth.type == htons(ETH_P_ARP) | |
150 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
151 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
f2a01517 | 152 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
e6445719 PS |
153 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; |
154 | } | |
155 | ||
25cd9ba0 SH |
156 | if (eth_p_mpls(match->key->eth.type)) { |
157 | key_expected |= 1 << OVS_KEY_ATTR_MPLS; | |
158 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
159 | mask_allowed |= 1 << OVS_KEY_ATTR_MPLS; | |
160 | } | |
161 | ||
e6445719 PS |
162 | if (match->key->eth.type == htons(ETH_P_IP)) { |
163 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
164 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
165 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
166 | ||
167 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
168 | if (match->key->ip.proto == IPPROTO_UDP) { | |
169 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
170 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
171 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
172 | } | |
173 | ||
174 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
175 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
176 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
177 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
178 | } | |
179 | ||
180 | if (match->key->ip.proto == IPPROTO_TCP) { | |
181 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
182 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
183 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 184 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
185 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
186 | } | |
e6445719 PS |
187 | } |
188 | ||
189 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
190 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
191 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
192 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
193 | } | |
194 | } | |
195 | } | |
196 | ||
197 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
198 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
199 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
200 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
201 | ||
202 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
203 | if (match->key->ip.proto == IPPROTO_UDP) { | |
204 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
205 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
206 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
207 | } | |
208 | ||
209 | if (match->key->ip.proto == IPPROTO_SCTP) { | |
210 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
211 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
212 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
213 | } | |
214 | ||
215 | if (match->key->ip.proto == IPPROTO_TCP) { | |
216 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
5eb26b15 JR |
217 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
218 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { | |
e6445719 | 219 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
5eb26b15 JR |
220 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
221 | } | |
e6445719 PS |
222 | } |
223 | ||
224 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
225 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
226 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
227 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
228 | ||
1139e241 | 229 | if (match->key->tp.src == |
e6445719 | 230 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
1139e241 | 231 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
e6445719 | 232 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
f2a01517 | 233 | if (match->mask && (match->mask->key.tp.src == htons(0xff))) |
e6445719 PS |
234 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
235 | } | |
236 | } | |
237 | } | |
238 | } | |
239 | ||
240 | if ((key_attrs & key_expected) != key_expected) { | |
241 | /* Key attributes check failed. */ | |
05da5898 JR |
242 | OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)", |
243 | (unsigned long long)key_attrs, | |
244 | (unsigned long long)key_expected); | |
e6445719 PS |
245 | return false; |
246 | } | |
247 | ||
248 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
249 | /* Mask attributes check failed. */ | |
05da5898 JR |
250 | OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)", |
251 | (unsigned long long)mask_attrs, | |
252 | (unsigned long long)mask_allowed); | |
e6445719 PS |
253 | return false; |
254 | } | |
255 | ||
256 | return true; | |
257 | } | |
258 | ||
8f0aad6f WZ |
259 | size_t ovs_tun_key_attr_size(void) |
260 | { | |
261 | /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider | |
262 | * updating this function. | |
263 | */ | |
264 | return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */ | |
265 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */ | |
266 | + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */ | |
267 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */ | |
268 | + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */ | |
269 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */ | |
270 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */ | |
271 | + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */ | |
272 | + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */ | |
1dd144cf TG |
273 | /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with |
274 | * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it. | |
275 | */ | |
8f0aad6f WZ |
276 | + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */ |
277 | + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */ | |
278 | } | |
279 | ||
41af73e9 JS |
280 | size_t ovs_key_attr_size(void) |
281 | { | |
282 | /* Whenever adding new OVS_KEY_ FIELDS, we should consider | |
283 | * updating this function. | |
284 | */ | |
c2ac6673 | 285 | BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26); |
41af73e9 JS |
286 | |
287 | return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */ | |
288 | + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */ | |
8f0aad6f | 289 | + ovs_tun_key_attr_size() |
41af73e9 JS |
290 | + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */ |
291 | + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */ | |
292 | + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */ | |
293 | + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */ | |
7f8a436e JS |
294 | + nla_total_size(1) /* OVS_KEY_ATTR_CT_STATE */ |
295 | + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */ | |
182e3042 | 296 | + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */ |
c2ac6673 | 297 | + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABEL */ |
41af73e9 JS |
298 | + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */ |
299 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
300 | + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */ | |
301 | + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */ | |
302 | + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */ | |
303 | + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */ | |
304 | + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */ | |
305 | + nla_total_size(28); /* OVS_KEY_ATTR_ND */ | |
306 | } | |
307 | ||
982b5270 JG |
308 | static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = { |
309 | [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) }, | |
310 | }; | |
311 | ||
81bfe3c3 TG |
312 | static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
313 | [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) }, | |
314 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) }, | |
315 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) }, | |
316 | [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 }, | |
317 | [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 }, | |
318 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 }, | |
319 | [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 }, | |
320 | [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) }, | |
321 | [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) }, | |
322 | [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 }, | |
982b5270 JG |
323 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE }, |
324 | [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED, | |
325 | .next = ovs_vxlan_ext_key_lens }, | |
81bfe3c3 TG |
326 | }; |
327 | ||
e6445719 | 328 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
81bfe3c3 TG |
329 | static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
330 | [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED }, | |
331 | [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) }, | |
332 | [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) }, | |
333 | [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) }, | |
334 | [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) }, | |
335 | [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) }, | |
336 | [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) }, | |
337 | [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) }, | |
338 | [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) }, | |
339 | [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) }, | |
340 | [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) }, | |
341 | [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) }, | |
342 | [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) }, | |
343 | [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) }, | |
344 | [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) }, | |
345 | [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) }, | |
346 | [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) }, | |
347 | [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) }, | |
348 | [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) }, | |
349 | [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, | |
350 | .next = ovs_tunnel_key_lens, }, | |
351 | [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, | |
7f8a436e JS |
352 | [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u8) }, |
353 | [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) }, | |
182e3042 | 354 | [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) }, |
c2ac6673 | 355 | [OVS_KEY_ATTR_CT_LABEL] = { .len = sizeof(struct ovs_key_ct_label) }, |
e6445719 PS |
356 | }; |
357 | ||
982b5270 JG |
358 | static bool check_attr_len(unsigned int attr_len, unsigned int expected_len) |
359 | { | |
360 | return expected_len == attr_len || | |
361 | expected_len == OVS_ATTR_NESTED || | |
362 | expected_len == OVS_ATTR_VARIABLE; | |
363 | } | |
364 | ||
e6445719 PS |
365 | static bool is_all_zero(const u8 *fp, size_t size) |
366 | { | |
367 | int i; | |
368 | ||
369 | if (!fp) | |
370 | return false; | |
371 | ||
372 | for (i = 0; i < size; i++) | |
373 | if (fp[i]) | |
374 | return false; | |
375 | ||
376 | return true; | |
377 | } | |
378 | ||
379 | static int __parse_flow_nlattrs(const struct nlattr *attr, | |
380 | const struct nlattr *a[], | |
05da5898 | 381 | u64 *attrsp, bool log, bool nz) |
e6445719 PS |
382 | { |
383 | const struct nlattr *nla; | |
384 | u64 attrs; | |
385 | int rem; | |
386 | ||
387 | attrs = *attrsp; | |
388 | nla_for_each_nested(nla, attr, rem) { | |
389 | u16 type = nla_type(nla); | |
390 | int expected_len; | |
391 | ||
392 | if (type > OVS_KEY_ATTR_MAX) { | |
05da5898 | 393 | OVS_NLERR(log, "Key type %d is out of range max %d", |
e6445719 PS |
394 | type, OVS_KEY_ATTR_MAX); |
395 | return -EINVAL; | |
396 | } | |
397 | ||
398 | if (attrs & (1 << type)) { | |
05da5898 | 399 | OVS_NLERR(log, "Duplicate key (type %d).", type); |
e6445719 PS |
400 | return -EINVAL; |
401 | } | |
402 | ||
81bfe3c3 | 403 | expected_len = ovs_key_lens[type].len; |
982b5270 | 404 | if (!check_attr_len(nla_len(nla), expected_len)) { |
05da5898 JR |
405 | OVS_NLERR(log, "Key %d has unexpected len %d expected %d", |
406 | type, nla_len(nla), expected_len); | |
e6445719 PS |
407 | return -EINVAL; |
408 | } | |
409 | ||
410 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
411 | attrs |= 1 << type; | |
412 | a[type] = nla; | |
413 | } | |
414 | } | |
415 | if (rem) { | |
05da5898 | 416 | OVS_NLERR(log, "Message has %d unknown bytes.", rem); |
e6445719 PS |
417 | return -EINVAL; |
418 | } | |
419 | ||
420 | *attrsp = attrs; | |
421 | return 0; | |
422 | } | |
423 | ||
424 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
425 | const struct nlattr *a[], u64 *attrsp, |
426 | bool log) | |
e6445719 | 427 | { |
05da5898 | 428 | return __parse_flow_nlattrs(attr, a, attrsp, log, true); |
e6445719 PS |
429 | } |
430 | ||
431 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
05da5898 JR |
432 | const struct nlattr *a[], u64 *attrsp, |
433 | bool log) | |
e6445719 | 434 | { |
05da5898 JR |
435 | return __parse_flow_nlattrs(attr, a, attrsp, log, false); |
436 | } | |
437 | ||
438 | static int genev_tun_opt_from_nlattr(const struct nlattr *a, | |
439 | struct sw_flow_match *match, bool is_mask, | |
440 | bool log) | |
441 | { | |
442 | unsigned long opt_key_offset; | |
443 | ||
444 | if (nla_len(a) > sizeof(match->key->tun_opts)) { | |
445 | OVS_NLERR(log, "Geneve option length err (len %d, max %zu).", | |
446 | nla_len(a), sizeof(match->key->tun_opts)); | |
447 | return -EINVAL; | |
448 | } | |
449 | ||
450 | if (nla_len(a) % 4 != 0) { | |
451 | OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.", | |
452 | nla_len(a)); | |
453 | return -EINVAL; | |
454 | } | |
455 | ||
456 | /* We need to record the length of the options passed | |
457 | * down, otherwise packets with the same format but | |
458 | * additional options will be silently matched. | |
459 | */ | |
460 | if (!is_mask) { | |
461 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), | |
462 | false); | |
463 | } else { | |
464 | /* This is somewhat unusual because it looks at | |
465 | * both the key and mask while parsing the | |
466 | * attributes (and by extension assumes the key | |
467 | * is parsed first). Normally, we would verify | |
468 | * that each is the correct length and that the | |
469 | * attributes line up in the validate function. | |
470 | * However, that is difficult because this is | |
471 | * variable length and we won't have the | |
472 | * information later. | |
473 | */ | |
474 | if (match->key->tun_opts_len != nla_len(a)) { | |
475 | OVS_NLERR(log, "Geneve option len %d != mask len %d", | |
476 | match->key->tun_opts_len, nla_len(a)); | |
477 | return -EINVAL; | |
478 | } | |
479 | ||
480 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
481 | } | |
482 | ||
d91641d9 | 483 | opt_key_offset = TUN_METADATA_OFFSET(nla_len(a)); |
05da5898 JR |
484 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a), |
485 | nla_len(a), is_mask); | |
486 | return 0; | |
e6445719 PS |
487 | } |
488 | ||
982b5270 | 489 | static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr, |
1dd144cf TG |
490 | struct sw_flow_match *match, bool is_mask, |
491 | bool log) | |
492 | { | |
982b5270 JG |
493 | struct nlattr *a; |
494 | int rem; | |
1dd144cf | 495 | unsigned long opt_key_offset; |
614732ea | 496 | struct vxlan_metadata opts; |
1dd144cf TG |
497 | |
498 | BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts)); | |
499 | ||
1dd144cf | 500 | memset(&opts, 0, sizeof(opts)); |
982b5270 JG |
501 | nla_for_each_nested(a, attr, rem) { |
502 | int type = nla_type(a); | |
1dd144cf | 503 | |
982b5270 JG |
504 | if (type > OVS_VXLAN_EXT_MAX) { |
505 | OVS_NLERR(log, "VXLAN extension %d out of range max %d", | |
506 | type, OVS_VXLAN_EXT_MAX); | |
507 | return -EINVAL; | |
508 | } | |
509 | ||
510 | if (!check_attr_len(nla_len(a), | |
511 | ovs_vxlan_ext_key_lens[type].len)) { | |
512 | OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d", | |
513 | type, nla_len(a), | |
514 | ovs_vxlan_ext_key_lens[type].len); | |
515 | return -EINVAL; | |
516 | } | |
517 | ||
518 | switch (type) { | |
519 | case OVS_VXLAN_EXT_GBP: | |
520 | opts.gbp = nla_get_u32(a); | |
521 | break; | |
522 | default: | |
523 | OVS_NLERR(log, "Unknown VXLAN extension attribute %d", | |
524 | type); | |
525 | return -EINVAL; | |
526 | } | |
527 | } | |
528 | if (rem) { | |
529 | OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.", | |
530 | rem); | |
531 | return -EINVAL; | |
532 | } | |
1dd144cf TG |
533 | |
534 | if (!is_mask) | |
535 | SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false); | |
536 | else | |
537 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true); | |
538 | ||
539 | opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts)); | |
540 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts), | |
541 | is_mask); | |
542 | return 0; | |
543 | } | |
544 | ||
e6445719 | 545 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, |
05da5898 JR |
546 | struct sw_flow_match *match, bool is_mask, |
547 | bool log) | |
e6445719 PS |
548 | { |
549 | struct nlattr *a; | |
550 | int rem; | |
551 | bool ttl = false; | |
552 | __be16 tun_flags = 0; | |
1dd144cf | 553 | int opts_type = 0; |
e6445719 PS |
554 | |
555 | nla_for_each_nested(a, attr, rem) { | |
556 | int type = nla_type(a); | |
05da5898 JR |
557 | int err; |
558 | ||
e6445719 | 559 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
05da5898 JR |
560 | OVS_NLERR(log, "Tunnel attr %d out of range max %d", |
561 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
e6445719 PS |
562 | return -EINVAL; |
563 | } | |
564 | ||
982b5270 JG |
565 | if (!check_attr_len(nla_len(a), |
566 | ovs_tunnel_key_lens[type].len)) { | |
05da5898 | 567 | OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", |
81bfe3c3 | 568 | type, nla_len(a), ovs_tunnel_key_lens[type].len); |
e6445719 PS |
569 | return -EINVAL; |
570 | } | |
571 | ||
572 | switch (type) { | |
573 | case OVS_TUNNEL_KEY_ATTR_ID: | |
574 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, | |
575 | nla_get_be64(a), is_mask); | |
576 | tun_flags |= TUNNEL_KEY; | |
577 | break; | |
578 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
c1ea5d67 | 579 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src, |
67b61f6c | 580 | nla_get_in_addr(a), is_mask); |
e6445719 PS |
581 | break; |
582 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
c1ea5d67 | 583 | SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst, |
67b61f6c | 584 | nla_get_in_addr(a), is_mask); |
e6445719 PS |
585 | break; |
586 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
7c383fb2 | 587 | SW_FLOW_KEY_PUT(match, tun_key.tos, |
e6445719 PS |
588 | nla_get_u8(a), is_mask); |
589 | break; | |
590 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
7c383fb2 | 591 | SW_FLOW_KEY_PUT(match, tun_key.ttl, |
e6445719 PS |
592 | nla_get_u8(a), is_mask); |
593 | ttl = true; | |
594 | break; | |
595 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
596 | tun_flags |= TUNNEL_DONT_FRAGMENT; | |
597 | break; | |
598 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
599 | tun_flags |= TUNNEL_CSUM; | |
600 | break; | |
8f0aad6f WZ |
601 | case OVS_TUNNEL_KEY_ATTR_TP_SRC: |
602 | SW_FLOW_KEY_PUT(match, tun_key.tp_src, | |
603 | nla_get_be16(a), is_mask); | |
604 | break; | |
605 | case OVS_TUNNEL_KEY_ATTR_TP_DST: | |
606 | SW_FLOW_KEY_PUT(match, tun_key.tp_dst, | |
607 | nla_get_be16(a), is_mask); | |
608 | break; | |
67fa0341 JG |
609 | case OVS_TUNNEL_KEY_ATTR_OAM: |
610 | tun_flags |= TUNNEL_OAM; | |
611 | break; | |
f5796684 | 612 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
1dd144cf TG |
613 | if (opts_type) { |
614 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
615 | return -EINVAL; | |
616 | } | |
617 | ||
05da5898 JR |
618 | err = genev_tun_opt_from_nlattr(a, match, is_mask, log); |
619 | if (err) | |
620 | return err; | |
f5796684 | 621 | |
1dd144cf TG |
622 | tun_flags |= TUNNEL_GENEVE_OPT; |
623 | opts_type = type; | |
624 | break; | |
625 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
626 | if (opts_type) { | |
627 | OVS_NLERR(log, "Multiple metadata blocks provided"); | |
628 | return -EINVAL; | |
629 | } | |
630 | ||
631 | err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log); | |
632 | if (err) | |
633 | return err; | |
634 | ||
635 | tun_flags |= TUNNEL_VXLAN_OPT; | |
636 | opts_type = type; | |
f5796684 | 637 | break; |
e6445719 | 638 | default: |
05da5898 | 639 | OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d", |
f5796684 | 640 | type); |
e6445719 PS |
641 | return -EINVAL; |
642 | } | |
643 | } | |
644 | ||
645 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
646 | ||
647 | if (rem > 0) { | |
05da5898 JR |
648 | OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.", |
649 | rem); | |
e6445719 PS |
650 | return -EINVAL; |
651 | } | |
652 | ||
653 | if (!is_mask) { | |
c1ea5d67 | 654 | if (!match->key->tun_key.u.ipv4.dst) { |
05da5898 | 655 | OVS_NLERR(log, "IPv4 tunnel dst address is zero"); |
e6445719 PS |
656 | return -EINVAL; |
657 | } | |
658 | ||
659 | if (!ttl) { | |
05da5898 | 660 | OVS_NLERR(log, "IPv4 tunnel TTL not specified."); |
e6445719 PS |
661 | return -EINVAL; |
662 | } | |
663 | } | |
664 | ||
1dd144cf TG |
665 | return opts_type; |
666 | } | |
667 | ||
668 | static int vxlan_opt_to_nlattr(struct sk_buff *skb, | |
669 | const void *tun_opts, int swkey_tun_opts_len) | |
670 | { | |
614732ea | 671 | const struct vxlan_metadata *opts = tun_opts; |
1dd144cf TG |
672 | struct nlattr *nla; |
673 | ||
674 | nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS); | |
675 | if (!nla) | |
676 | return -EMSGSIZE; | |
677 | ||
678 | if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0) | |
679 | return -EMSGSIZE; | |
680 | ||
681 | nla_nest_end(skb, nla); | |
e6445719 PS |
682 | return 0; |
683 | } | |
684 | ||
f5796684 | 685 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
1d8fff90 | 686 | const struct ip_tunnel_key *output, |
d91641d9 | 687 | const void *tun_opts, int swkey_tun_opts_len) |
e6445719 | 688 | { |
e6445719 PS |
689 | if (output->tun_flags & TUNNEL_KEY && |
690 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
691 | return -EMSGSIZE; | |
c1ea5d67 | 692 | if (output->u.ipv4.src && |
930345ea | 693 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, |
c1ea5d67 | 694 | output->u.ipv4.src)) |
e6445719 | 695 | return -EMSGSIZE; |
c1ea5d67 | 696 | if (output->u.ipv4.dst && |
930345ea | 697 | nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, |
c1ea5d67 | 698 | output->u.ipv4.dst)) |
e6445719 | 699 | return -EMSGSIZE; |
7c383fb2 JB |
700 | if (output->tos && |
701 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos)) | |
e6445719 | 702 | return -EMSGSIZE; |
7c383fb2 | 703 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl)) |
e6445719 PS |
704 | return -EMSGSIZE; |
705 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && | |
67fa0341 | 706 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
e6445719 PS |
707 | return -EMSGSIZE; |
708 | if ((output->tun_flags & TUNNEL_CSUM) && | |
67fa0341 JG |
709 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
710 | return -EMSGSIZE; | |
8f0aad6f WZ |
711 | if (output->tp_src && |
712 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src)) | |
713 | return -EMSGSIZE; | |
714 | if (output->tp_dst && | |
715 | nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst)) | |
716 | return -EMSGSIZE; | |
67fa0341 JG |
717 | if ((output->tun_flags & TUNNEL_OAM) && |
718 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) | |
e6445719 | 719 | return -EMSGSIZE; |
1dd144cf TG |
720 | if (tun_opts) { |
721 | if (output->tun_flags & TUNNEL_GENEVE_OPT && | |
722 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, | |
723 | swkey_tun_opts_len, tun_opts)) | |
724 | return -EMSGSIZE; | |
725 | else if (output->tun_flags & TUNNEL_VXLAN_OPT && | |
726 | vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len)) | |
727 | return -EMSGSIZE; | |
728 | } | |
e6445719 | 729 | |
e6445719 PS |
730 | return 0; |
731 | } | |
732 | ||
f5796684 | 733 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
1d8fff90 | 734 | const struct ip_tunnel_key *output, |
d91641d9 | 735 | const void *tun_opts, int swkey_tun_opts_len) |
f5796684 JG |
736 | { |
737 | struct nlattr *nla; | |
738 | int err; | |
739 | ||
740 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
741 | if (!nla) | |
742 | return -EMSGSIZE; | |
743 | ||
744 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); | |
745 | if (err) | |
746 | return err; | |
747 | ||
748 | nla_nest_end(skb, nla); | |
749 | return 0; | |
750 | } | |
751 | ||
8f0aad6f | 752 | int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb, |
4c222798 PS |
753 | const struct ip_tunnel_info *egress_tun_info, |
754 | const void *egress_tun_opts) | |
8f0aad6f | 755 | { |
1d8fff90 | 756 | return __ipv4_tun_to_nlattr(skb, &egress_tun_info->key, |
4c222798 | 757 | egress_tun_opts, |
8f0aad6f WZ |
758 | egress_tun_info->options_len); |
759 | } | |
760 | ||
c2ac6673 JS |
761 | static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, |
762 | u64 *attrs, const struct nlattr **a, | |
763 | bool is_mask, bool log) | |
e6445719 | 764 | { |
971427f3 AZ |
765 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
766 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); | |
767 | ||
768 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); | |
769 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); | |
770 | } | |
771 | ||
772 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { | |
773 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); | |
774 | ||
775 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); | |
776 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); | |
777 | } | |
778 | ||
e6445719 PS |
779 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
780 | SW_FLOW_KEY_PUT(match, phy.priority, | |
781 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
782 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
783 | } | |
784 | ||
785 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { | |
786 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
787 | ||
426cda5c | 788 | if (is_mask) { |
e6445719 | 789 | in_port = 0xffffffff; /* Always exact match in_port. */ |
426cda5c | 790 | } else if (in_port >= DP_MAX_PORTS) { |
05da5898 | 791 | OVS_NLERR(log, "Port %d exceeds max allowable %d", |
426cda5c | 792 | in_port, DP_MAX_PORTS); |
e6445719 | 793 | return -EINVAL; |
426cda5c | 794 | } |
e6445719 PS |
795 | |
796 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); | |
797 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
798 | } else if (!is_mask) { | |
799 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
800 | } | |
801 | ||
802 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
803 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
804 | ||
805 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
806 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
807 | } | |
808 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { | |
809 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1dd144cf | 810 | is_mask, log) < 0) |
e6445719 PS |
811 | return -EINVAL; |
812 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
813 | } | |
7f8a436e JS |
814 | |
815 | if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) && | |
c2ac6673 | 816 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { |
7f8a436e JS |
817 | u8 ct_state = nla_get_u8(a[OVS_KEY_ATTR_CT_STATE]); |
818 | ||
819 | SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask); | |
820 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE); | |
821 | } | |
822 | if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) && | |
c2ac6673 | 823 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) { |
7f8a436e JS |
824 | u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]); |
825 | ||
826 | SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask); | |
827 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE); | |
828 | } | |
182e3042 | 829 | if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) && |
c2ac6673 | 830 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) { |
182e3042 JS |
831 | u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]); |
832 | ||
833 | SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask); | |
834 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK); | |
835 | } | |
c2ac6673 JS |
836 | if (*attrs & (1 << OVS_KEY_ATTR_CT_LABEL) && |
837 | ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABEL)) { | |
838 | const struct ovs_key_ct_label *cl; | |
839 | ||
840 | cl = nla_data(a[OVS_KEY_ATTR_CT_LABEL]); | |
841 | SW_FLOW_KEY_MEMCPY(match, ct.label, cl->ct_label, | |
842 | sizeof(*cl), is_mask); | |
843 | *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABEL); | |
844 | } | |
e6445719 PS |
845 | return 0; |
846 | } | |
847 | ||
c2ac6673 JS |
848 | static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match, |
849 | u64 attrs, const struct nlattr **a, | |
850 | bool is_mask, bool log) | |
e6445719 PS |
851 | { |
852 | int err; | |
e6445719 | 853 | |
c2ac6673 | 854 | err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log); |
e6445719 PS |
855 | if (err) |
856 | return err; | |
857 | ||
858 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { | |
859 | const struct ovs_key_ethernet *eth_key; | |
860 | ||
861 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); | |
862 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
863 | eth_key->eth_src, ETH_ALEN, is_mask); | |
864 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
865 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
866 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
867 | } | |
868 | ||
869 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { | |
870 | __be16 tci; | |
871 | ||
872 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
873 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
874 | if (is_mask) | |
05da5898 | 875 | OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit."); |
e6445719 | 876 | else |
05da5898 | 877 | OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set."); |
e6445719 PS |
878 | |
879 | return -EINVAL; | |
880 | } | |
881 | ||
882 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
883 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
a85311bf | 884 | } |
e6445719 PS |
885 | |
886 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
887 | __be16 eth_type; | |
888 | ||
889 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
890 | if (is_mask) { | |
891 | /* Always exact match EtherType. */ | |
892 | eth_type = htons(0xffff); | |
6713fc9b | 893 | } else if (!eth_proto_is_802_3(eth_type)) { |
05da5898 JR |
894 | OVS_NLERR(log, "EtherType %x is less than min %x", |
895 | ntohs(eth_type), ETH_P_802_3_MIN); | |
e6445719 PS |
896 | return -EINVAL; |
897 | } | |
898 | ||
899 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
900 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
901 | } else if (!is_mask) { | |
902 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
903 | } | |
904 | ||
905 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
906 | const struct ovs_key_ipv4 *ipv4_key; | |
907 | ||
908 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
909 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
910 | OVS_NLERR(log, "IPv4 frag type %d is out of range max %d", |
911 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
912 | return -EINVAL; |
913 | } | |
914 | SW_FLOW_KEY_PUT(match, ip.proto, | |
915 | ipv4_key->ipv4_proto, is_mask); | |
916 | SW_FLOW_KEY_PUT(match, ip.tos, | |
917 | ipv4_key->ipv4_tos, is_mask); | |
918 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
919 | ipv4_key->ipv4_ttl, is_mask); | |
920 | SW_FLOW_KEY_PUT(match, ip.frag, | |
921 | ipv4_key->ipv4_frag, is_mask); | |
922 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
923 | ipv4_key->ipv4_src, is_mask); | |
924 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
925 | ipv4_key->ipv4_dst, is_mask); | |
926 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
927 | } | |
928 | ||
929 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { | |
930 | const struct ovs_key_ipv6 *ipv6_key; | |
931 | ||
932 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); | |
933 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { | |
05da5898 JR |
934 | OVS_NLERR(log, "IPv6 frag type %d is out of range max %d", |
935 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
e6445719 PS |
936 | return -EINVAL; |
937 | } | |
fecaef85 | 938 | |
d3052bb5 | 939 | if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) { |
14591433 | 940 | OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n", |
fecaef85 JR |
941 | ntohl(ipv6_key->ipv6_label), (1 << 20) - 1); |
942 | return -EINVAL; | |
943 | } | |
944 | ||
e6445719 PS |
945 | SW_FLOW_KEY_PUT(match, ipv6.label, |
946 | ipv6_key->ipv6_label, is_mask); | |
947 | SW_FLOW_KEY_PUT(match, ip.proto, | |
948 | ipv6_key->ipv6_proto, is_mask); | |
949 | SW_FLOW_KEY_PUT(match, ip.tos, | |
950 | ipv6_key->ipv6_tclass, is_mask); | |
951 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
952 | ipv6_key->ipv6_hlimit, is_mask); | |
953 | SW_FLOW_KEY_PUT(match, ip.frag, | |
954 | ipv6_key->ipv6_frag, is_mask); | |
955 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
956 | ipv6_key->ipv6_src, | |
957 | sizeof(match->key->ipv6.addr.src), | |
958 | is_mask); | |
959 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
960 | ipv6_key->ipv6_dst, | |
961 | sizeof(match->key->ipv6.addr.dst), | |
962 | is_mask); | |
963 | ||
964 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
965 | } | |
966 | ||
967 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
968 | const struct ovs_key_arp *arp_key; | |
969 | ||
970 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
971 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
05da5898 | 972 | OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).", |
e6445719 PS |
973 | arp_key->arp_op); |
974 | return -EINVAL; | |
975 | } | |
976 | ||
977 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
978 | arp_key->arp_sip, is_mask); | |
979 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
980 | arp_key->arp_tip, is_mask); | |
981 | SW_FLOW_KEY_PUT(match, ip.proto, | |
982 | ntohs(arp_key->arp_op), is_mask); | |
983 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
984 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
985 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
986 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
987 | ||
988 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); | |
989 | } | |
990 | ||
25cd9ba0 SH |
991 | if (attrs & (1 << OVS_KEY_ATTR_MPLS)) { |
992 | const struct ovs_key_mpls *mpls_key; | |
993 | ||
994 | mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]); | |
995 | SW_FLOW_KEY_PUT(match, mpls.top_lse, | |
996 | mpls_key->mpls_lse, is_mask); | |
997 | ||
998 | attrs &= ~(1 << OVS_KEY_ATTR_MPLS); | |
999 | } | |
1000 | ||
e6445719 PS |
1001 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
1002 | const struct ovs_key_tcp *tcp_key; | |
1003 | ||
1004 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1139e241 JR |
1005 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
1006 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); | |
e6445719 PS |
1007 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
1008 | } | |
1009 | ||
5eb26b15 | 1010 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
1b760fb9 JS |
1011 | SW_FLOW_KEY_PUT(match, tp.flags, |
1012 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), | |
1013 | is_mask); | |
5eb26b15 JR |
1014 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
1015 | } | |
1016 | ||
e6445719 PS |
1017 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
1018 | const struct ovs_key_udp *udp_key; | |
1019 | ||
1020 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1139e241 JR |
1021 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
1022 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); | |
e6445719 PS |
1023 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
1024 | } | |
1025 | ||
1026 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { | |
1027 | const struct ovs_key_sctp *sctp_key; | |
1028 | ||
1029 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1139e241 JR |
1030 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
1031 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); | |
e6445719 PS |
1032 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
1033 | } | |
1034 | ||
1035 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { | |
1036 | const struct ovs_key_icmp *icmp_key; | |
1037 | ||
1038 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1139e241 | 1039 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1040 | htons(icmp_key->icmp_type), is_mask); |
1139e241 | 1041 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1042 | htons(icmp_key->icmp_code), is_mask); |
1043 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
1044 | } | |
1045 | ||
1046 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
1047 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1048 | ||
1049 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1139e241 | 1050 | SW_FLOW_KEY_PUT(match, tp.src, |
e6445719 | 1051 | htons(icmpv6_key->icmpv6_type), is_mask); |
1139e241 | 1052 | SW_FLOW_KEY_PUT(match, tp.dst, |
e6445719 PS |
1053 | htons(icmpv6_key->icmpv6_code), is_mask); |
1054 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
1055 | } | |
1056 | ||
1057 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
1058 | const struct ovs_key_nd *nd_key; | |
1059 | ||
1060 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1061 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1062 | nd_key->nd_target, | |
1063 | sizeof(match->key->ipv6.nd.target), | |
1064 | is_mask); | |
1065 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1066 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1067 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1068 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1069 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
1070 | } | |
1071 | ||
426cda5c | 1072 | if (attrs != 0) { |
05da5898 | 1073 | OVS_NLERR(log, "Unknown key attributes %llx", |
426cda5c | 1074 | (unsigned long long)attrs); |
e6445719 | 1075 | return -EINVAL; |
426cda5c | 1076 | } |
e6445719 PS |
1077 | |
1078 | return 0; | |
1079 | } | |
1080 | ||
81bfe3c3 TG |
1081 | static void nlattr_set(struct nlattr *attr, u8 val, |
1082 | const struct ovs_len_tbl *tbl) | |
e6445719 | 1083 | { |
f47de068 PS |
1084 | struct nlattr *nla; |
1085 | int rem; | |
e6445719 | 1086 | |
f47de068 PS |
1087 | /* The nlattr stream should already have been validated */ |
1088 | nla_for_each_nested(nla, attr, rem) { | |
982b5270 JG |
1089 | if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) { |
1090 | if (tbl[nla_type(nla)].next) | |
1091 | tbl = tbl[nla_type(nla)].next; | |
1092 | nlattr_set(nla, val, tbl); | |
1093 | } else { | |
f47de068 | 1094 | memset(nla_data(nla), val, nla_len(nla)); |
982b5270 | 1095 | } |
f47de068 PS |
1096 | } |
1097 | } | |
1098 | ||
1099 | static void mask_set_nlattr(struct nlattr *attr, u8 val) | |
1100 | { | |
81bfe3c3 | 1101 | nlattr_set(attr, val, ovs_key_lens); |
e6445719 PS |
1102 | } |
1103 | ||
1104 | /** | |
1105 | * ovs_nla_get_match - parses Netlink attributes into a flow key and | |
1106 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1107 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1108 | * does not include any don't care bit. | |
c2ac6673 | 1109 | * @net: Used to determine per-namespace field support. |
e6445719 PS |
1110 | * @match: receives the extracted flow match information. |
1111 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1112 | * sequence. The fields should of the packet that triggered the creation | |
1113 | * of this flow. | |
1114 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1115 | * attribute specifies the mask field of the wildcarded flow. | |
05da5898 JR |
1116 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1117 | * probing for feature compatibility this should be passed in as false to | |
1118 | * suppress unnecessary error logging. | |
e6445719 | 1119 | */ |
c2ac6673 | 1120 | int ovs_nla_get_match(struct net *net, struct sw_flow_match *match, |
a85311bf | 1121 | const struct nlattr *nla_key, |
05da5898 JR |
1122 | const struct nlattr *nla_mask, |
1123 | bool log) | |
e6445719 PS |
1124 | { |
1125 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1126 | const struct nlattr *encap; | |
f47de068 | 1127 | struct nlattr *newmask = NULL; |
e6445719 PS |
1128 | u64 key_attrs = 0; |
1129 | u64 mask_attrs = 0; | |
1130 | bool encap_valid = false; | |
1131 | int err; | |
1132 | ||
05da5898 | 1133 | err = parse_flow_nlattrs(nla_key, a, &key_attrs, log); |
e6445719 PS |
1134 | if (err) |
1135 | return err; | |
1136 | ||
1137 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
1138 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
1139 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1140 | __be16 tci; | |
1141 | ||
1142 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
1143 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
05da5898 | 1144 | OVS_NLERR(log, "Invalid Vlan frame."); |
e6445719 PS |
1145 | return -EINVAL; |
1146 | } | |
1147 | ||
1148 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1149 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1150 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1151 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1152 | encap_valid = true; | |
1153 | ||
1154 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
05da5898 | 1155 | err = parse_flow_nlattrs(encap, a, &key_attrs, log); |
e6445719 PS |
1156 | if (err) |
1157 | return err; | |
1158 | } else if (!tci) { | |
1159 | /* Corner case for truncated 802.1Q header. */ | |
1160 | if (nla_len(encap)) { | |
05da5898 | 1161 | OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute."); |
e6445719 PS |
1162 | return -EINVAL; |
1163 | } | |
1164 | } else { | |
05da5898 | 1165 | OVS_NLERR(log, "Encap attr is set for non-VLAN frame"); |
e6445719 PS |
1166 | return -EINVAL; |
1167 | } | |
1168 | } | |
1169 | ||
c2ac6673 | 1170 | err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log); |
e6445719 PS |
1171 | if (err) |
1172 | return err; | |
1173 | ||
a85311bf PS |
1174 | if (match->mask) { |
1175 | if (!nla_mask) { | |
1176 | /* Create an exact match mask. We need to set to 0xff | |
1177 | * all the 'match->mask' fields that have been touched | |
1178 | * in 'match->key'. We cannot simply memset | |
1179 | * 'match->mask', because padding bytes and fields not | |
1180 | * specified in 'match->key' should be left to 0. | |
1181 | * Instead, we use a stream of netlink attributes, | |
1182 | * copied from 'key' and set to 0xff. | |
1183 | * ovs_key_from_nlattrs() will take care of filling | |
1184 | * 'match->mask' appropriately. | |
1185 | */ | |
1186 | newmask = kmemdup(nla_key, | |
1187 | nla_total_size(nla_len(nla_key)), | |
1188 | GFP_KERNEL); | |
1189 | if (!newmask) | |
1190 | return -ENOMEM; | |
f47de068 | 1191 | |
a85311bf | 1192 | mask_set_nlattr(newmask, 0xff); |
f47de068 | 1193 | |
a85311bf PS |
1194 | /* The userspace does not send tunnel attributes that |
1195 | * are 0, but we should not wildcard them nonetheless. | |
1196 | */ | |
c1ea5d67 | 1197 | if (match->key->tun_key.u.ipv4.dst) |
a85311bf PS |
1198 | SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, |
1199 | 0xff, true); | |
f47de068 | 1200 | |
a85311bf PS |
1201 | nla_mask = newmask; |
1202 | } | |
f47de068 | 1203 | |
05da5898 | 1204 | err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log); |
e6445719 | 1205 | if (err) |
f47de068 | 1206 | goto free_newmask; |
e6445719 | 1207 | |
a85311bf PS |
1208 | /* Always match on tci. */ |
1209 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
1210 | ||
f47de068 | 1211 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { |
e6445719 PS |
1212 | __be16 eth_type = 0; |
1213 | __be16 tci = 0; | |
1214 | ||
1215 | if (!encap_valid) { | |
05da5898 | 1216 | OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame."); |
f47de068 PS |
1217 | err = -EINVAL; |
1218 | goto free_newmask; | |
e6445719 PS |
1219 | } |
1220 | ||
1221 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1222 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1223 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1224 | ||
1225 | if (eth_type == htons(0xffff)) { | |
1226 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1227 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
05da5898 JR |
1228 | err = parse_flow_mask_nlattrs(encap, a, |
1229 | &mask_attrs, log); | |
f47de068 PS |
1230 | if (err) |
1231 | goto free_newmask; | |
e6445719 | 1232 | } else { |
05da5898 JR |
1233 | OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).", |
1234 | ntohs(eth_type)); | |
f47de068 PS |
1235 | err = -EINVAL; |
1236 | goto free_newmask; | |
e6445719 PS |
1237 | } |
1238 | ||
1239 | if (a[OVS_KEY_ATTR_VLAN]) | |
1240 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1241 | ||
1242 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
05da5898 JR |
1243 | OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).", |
1244 | ntohs(tci)); | |
f47de068 PS |
1245 | err = -EINVAL; |
1246 | goto free_newmask; | |
e6445719 PS |
1247 | } |
1248 | } | |
1249 | ||
c2ac6673 JS |
1250 | err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true, |
1251 | log); | |
e6445719 | 1252 | if (err) |
f47de068 | 1253 | goto free_newmask; |
e6445719 PS |
1254 | } |
1255 | ||
05da5898 | 1256 | if (!match_validate(match, key_attrs, mask_attrs, log)) |
f47de068 | 1257 | err = -EINVAL; |
e6445719 | 1258 | |
f47de068 PS |
1259 | free_newmask: |
1260 | kfree(newmask); | |
1261 | return err; | |
e6445719 PS |
1262 | } |
1263 | ||
74ed7ab9 JS |
1264 | static size_t get_ufid_len(const struct nlattr *attr, bool log) |
1265 | { | |
1266 | size_t len; | |
1267 | ||
1268 | if (!attr) | |
1269 | return 0; | |
1270 | ||
1271 | len = nla_len(attr); | |
1272 | if (len < 1 || len > MAX_UFID_LENGTH) { | |
1273 | OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)", | |
1274 | nla_len(attr), MAX_UFID_LENGTH); | |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | return len; | |
1279 | } | |
1280 | ||
1281 | /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID, | |
1282 | * or false otherwise. | |
1283 | */ | |
1284 | bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr, | |
1285 | bool log) | |
1286 | { | |
1287 | sfid->ufid_len = get_ufid_len(attr, log); | |
1288 | if (sfid->ufid_len) | |
1289 | memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len); | |
1290 | ||
1291 | return sfid->ufid_len; | |
1292 | } | |
1293 | ||
1294 | int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid, | |
1295 | const struct sw_flow_key *key, bool log) | |
1296 | { | |
1297 | struct sw_flow_key *new_key; | |
1298 | ||
1299 | if (ovs_nla_get_ufid(sfid, ufid, log)) | |
1300 | return 0; | |
1301 | ||
1302 | /* If UFID was not provided, use unmasked key. */ | |
1303 | new_key = kmalloc(sizeof(*new_key), GFP_KERNEL); | |
1304 | if (!new_key) | |
1305 | return -ENOMEM; | |
1306 | memcpy(new_key, key, sizeof(*key)); | |
1307 | sfid->unmasked_key = new_key; | |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | u32 ovs_nla_get_ufid_flags(const struct nlattr *attr) | |
1313 | { | |
1314 | return attr ? nla_get_u32(attr) : 0; | |
1315 | } | |
1316 | ||
e6445719 PS |
1317 | /** |
1318 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. | |
83c8df26 | 1319 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
e6445719 PS |
1320 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
1321 | * sequence. | |
05da5898 JR |
1322 | * @log: Boolean to allow kernel error logging. Normally true, but when |
1323 | * probing for feature compatibility this should be passed in as false to | |
1324 | * suppress unnecessary error logging. | |
e6445719 PS |
1325 | * |
1326 | * This parses a series of Netlink attributes that form a flow key, which must | |
1327 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1328 | * get the metadata, that is, the parts of the flow key that cannot be | |
1329 | * extracted from the packet itself. | |
1330 | */ | |
1331 | ||
c2ac6673 | 1332 | int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr, |
05da5898 JR |
1333 | struct sw_flow_key *key, |
1334 | bool log) | |
e6445719 | 1335 | { |
e6445719 | 1336 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
83c8df26 | 1337 | struct sw_flow_match match; |
e6445719 PS |
1338 | u64 attrs = 0; |
1339 | int err; | |
e6445719 | 1340 | |
05da5898 | 1341 | err = parse_flow_nlattrs(attr, a, &attrs, log); |
e6445719 PS |
1342 | if (err) |
1343 | return -EINVAL; | |
1344 | ||
1345 | memset(&match, 0, sizeof(match)); | |
83c8df26 | 1346 | match.key = key; |
e6445719 | 1347 | |
7f8a436e | 1348 | memset(&key->ct, 0, sizeof(key->ct)); |
83c8df26 | 1349 | key->phy.in_port = DP_MAX_PORTS; |
e6445719 | 1350 | |
c2ac6673 | 1351 | return metadata_from_nlattrs(net, &match, &attrs, a, false, log); |
e6445719 PS |
1352 | } |
1353 | ||
5b4237bb JS |
1354 | static int __ovs_nla_put_key(const struct sw_flow_key *swkey, |
1355 | const struct sw_flow_key *output, bool is_mask, | |
1356 | struct sk_buff *skb) | |
e6445719 PS |
1357 | { |
1358 | struct ovs_key_ethernet *eth_key; | |
1359 | struct nlattr *nla, *encap; | |
e6445719 | 1360 | |
971427f3 AZ |
1361 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
1362 | goto nla_put_failure; | |
1363 | ||
1364 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) | |
1365 | goto nla_put_failure; | |
1366 | ||
e6445719 PS |
1367 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
1368 | goto nla_put_failure; | |
1369 | ||
c1ea5d67 | 1370 | if ((swkey->tun_key.u.ipv4.dst || is_mask)) { |
d91641d9 | 1371 | const void *opts = NULL; |
f5796684 JG |
1372 | |
1373 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) | |
d91641d9 | 1374 | opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len); |
f5796684 JG |
1375 | |
1376 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, | |
1377 | swkey->tun_opts_len)) | |
1378 | goto nla_put_failure; | |
1379 | } | |
e6445719 PS |
1380 | |
1381 | if (swkey->phy.in_port == DP_MAX_PORTS) { | |
1382 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1383 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1384 | goto nla_put_failure; | |
1385 | } else { | |
1386 | u16 upper_u16; | |
1387 | upper_u16 = !is_mask ? 0 : 0xffff; | |
1388 | ||
1389 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1390 | (upper_u16 << 16) | output->phy.in_port)) | |
1391 | goto nla_put_failure; | |
1392 | } | |
1393 | ||
1394 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
1395 | goto nla_put_failure; | |
1396 | ||
7f8a436e JS |
1397 | if (ovs_ct_put_key(output, skb)) |
1398 | goto nla_put_failure; | |
1399 | ||
e6445719 PS |
1400 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1401 | if (!nla) | |
1402 | goto nla_put_failure; | |
1403 | ||
1404 | eth_key = nla_data(nla); | |
8c63ff09 JP |
1405 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
1406 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); | |
e6445719 PS |
1407 | |
1408 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
1409 | __be16 eth_type; | |
1410 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1411 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1412 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
1413 | goto nla_put_failure; | |
1414 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); | |
1415 | if (!swkey->eth.tci) | |
1416 | goto unencap; | |
1417 | } else | |
1418 | encap = NULL; | |
1419 | ||
1420 | if (swkey->eth.type == htons(ETH_P_802_2)) { | |
1421 | /* | |
1422 | * Ethertype 802.2 is represented in the netlink with omitted | |
1423 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1424 | * 0xffff in the mask attribute. Ethertype can also | |
1425 | * be wildcarded. | |
1426 | */ | |
1427 | if (is_mask && output->eth.type) | |
1428 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1429 | output->eth.type)) | |
1430 | goto nla_put_failure; | |
1431 | goto unencap; | |
1432 | } | |
1433 | ||
1434 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1435 | goto nla_put_failure; | |
1436 | ||
1437 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1438 | struct ovs_key_ipv4 *ipv4_key; | |
1439 | ||
1440 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1441 | if (!nla) | |
1442 | goto nla_put_failure; | |
1443 | ipv4_key = nla_data(nla); | |
1444 | ipv4_key->ipv4_src = output->ipv4.addr.src; | |
1445 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1446 | ipv4_key->ipv4_proto = output->ip.proto; | |
1447 | ipv4_key->ipv4_tos = output->ip.tos; | |
1448 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1449 | ipv4_key->ipv4_frag = output->ip.frag; | |
1450 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1451 | struct ovs_key_ipv6 *ipv6_key; | |
1452 | ||
1453 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1454 | if (!nla) | |
1455 | goto nla_put_failure; | |
1456 | ipv6_key = nla_data(nla); | |
1457 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, | |
1458 | sizeof(ipv6_key->ipv6_src)); | |
1459 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, | |
1460 | sizeof(ipv6_key->ipv6_dst)); | |
1461 | ipv6_key->ipv6_label = output->ipv6.label; | |
1462 | ipv6_key->ipv6_proto = output->ip.proto; | |
1463 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1464 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1465 | ipv6_key->ipv6_frag = output->ip.frag; | |
1466 | } else if (swkey->eth.type == htons(ETH_P_ARP) || | |
1467 | swkey->eth.type == htons(ETH_P_RARP)) { | |
1468 | struct ovs_key_arp *arp_key; | |
1469 | ||
1470 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1471 | if (!nla) | |
1472 | goto nla_put_failure; | |
1473 | arp_key = nla_data(nla); | |
1474 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
1475 | arp_key->arp_sip = output->ipv4.addr.src; | |
1476 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1477 | arp_key->arp_op = htons(output->ip.proto); | |
8c63ff09 JP |
1478 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
1479 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); | |
25cd9ba0 SH |
1480 | } else if (eth_p_mpls(swkey->eth.type)) { |
1481 | struct ovs_key_mpls *mpls_key; | |
1482 | ||
1483 | nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key)); | |
1484 | if (!nla) | |
1485 | goto nla_put_failure; | |
1486 | mpls_key = nla_data(nla); | |
1487 | mpls_key->mpls_lse = output->mpls.top_lse; | |
e6445719 PS |
1488 | } |
1489 | ||
1490 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1491 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1492 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1493 | ||
1494 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1495 | struct ovs_key_tcp *tcp_key; | |
1496 | ||
1497 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1498 | if (!nla) | |
1499 | goto nla_put_failure; | |
1500 | tcp_key = nla_data(nla); | |
1139e241 JR |
1501 | tcp_key->tcp_src = output->tp.src; |
1502 | tcp_key->tcp_dst = output->tp.dst; | |
1503 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, | |
1504 | output->tp.flags)) | |
1505 | goto nla_put_failure; | |
e6445719 PS |
1506 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
1507 | struct ovs_key_udp *udp_key; | |
1508 | ||
1509 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1510 | if (!nla) | |
1511 | goto nla_put_failure; | |
1512 | udp_key = nla_data(nla); | |
1139e241 JR |
1513 | udp_key->udp_src = output->tp.src; |
1514 | udp_key->udp_dst = output->tp.dst; | |
e6445719 PS |
1515 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1516 | struct ovs_key_sctp *sctp_key; | |
1517 | ||
1518 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1519 | if (!nla) | |
1520 | goto nla_put_failure; | |
1521 | sctp_key = nla_data(nla); | |
1139e241 JR |
1522 | sctp_key->sctp_src = output->tp.src; |
1523 | sctp_key->sctp_dst = output->tp.dst; | |
e6445719 PS |
1524 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1525 | swkey->ip.proto == IPPROTO_ICMP) { | |
1526 | struct ovs_key_icmp *icmp_key; | |
1527 | ||
1528 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1529 | if (!nla) | |
1530 | goto nla_put_failure; | |
1531 | icmp_key = nla_data(nla); | |
1139e241 JR |
1532 | icmp_key->icmp_type = ntohs(output->tp.src); |
1533 | icmp_key->icmp_code = ntohs(output->tp.dst); | |
e6445719 PS |
1534 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1535 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1536 | struct ovs_key_icmpv6 *icmpv6_key; | |
1537 | ||
1538 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1539 | sizeof(*icmpv6_key)); | |
1540 | if (!nla) | |
1541 | goto nla_put_failure; | |
1542 | icmpv6_key = nla_data(nla); | |
1139e241 JR |
1543 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
1544 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); | |
e6445719 PS |
1545 | |
1546 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1547 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1548 | struct ovs_key_nd *nd_key; | |
1549 | ||
1550 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1551 | if (!nla) | |
1552 | goto nla_put_failure; | |
1553 | nd_key = nla_data(nla); | |
1554 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, | |
1555 | sizeof(nd_key->nd_target)); | |
8c63ff09 JP |
1556 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
1557 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); | |
e6445719 PS |
1558 | } |
1559 | } | |
1560 | } | |
1561 | ||
1562 | unencap: | |
1563 | if (encap) | |
1564 | nla_nest_end(skb, encap); | |
1565 | ||
1566 | return 0; | |
1567 | ||
1568 | nla_put_failure: | |
1569 | return -EMSGSIZE; | |
1570 | } | |
1571 | ||
5b4237bb JS |
1572 | int ovs_nla_put_key(const struct sw_flow_key *swkey, |
1573 | const struct sw_flow_key *output, int attr, bool is_mask, | |
1574 | struct sk_buff *skb) | |
1575 | { | |
1576 | int err; | |
1577 | struct nlattr *nla; | |
1578 | ||
1579 | nla = nla_nest_start(skb, attr); | |
1580 | if (!nla) | |
1581 | return -EMSGSIZE; | |
1582 | err = __ovs_nla_put_key(swkey, output, is_mask, skb); | |
1583 | if (err) | |
1584 | return err; | |
1585 | nla_nest_end(skb, nla); | |
1586 | ||
1587 | return 0; | |
1588 | } | |
1589 | ||
1590 | /* Called with ovs_mutex or RCU read lock. */ | |
74ed7ab9 JS |
1591 | int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb) |
1592 | { | |
1593 | if (ovs_identifier_is_ufid(&flow->id)) | |
1594 | return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len, | |
1595 | flow->id.ufid); | |
1596 | ||
1597 | return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key, | |
1598 | OVS_FLOW_ATTR_KEY, false, skb); | |
1599 | } | |
1600 | ||
1601 | /* Called with ovs_mutex or RCU read lock. */ | |
1602 | int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb) | |
5b4237bb | 1603 | { |
26ad0b83 | 1604 | return ovs_nla_put_key(&flow->key, &flow->key, |
5b4237bb JS |
1605 | OVS_FLOW_ATTR_KEY, false, skb); |
1606 | } | |
1607 | ||
1608 | /* Called with ovs_mutex or RCU read lock. */ | |
1609 | int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb) | |
1610 | { | |
1611 | return ovs_nla_put_key(&flow->key, &flow->mask->key, | |
1612 | OVS_FLOW_ATTR_MASK, true, skb); | |
1613 | } | |
1614 | ||
e6445719 PS |
1615 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
1616 | ||
05da5898 | 1617 | static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log) |
e6445719 PS |
1618 | { |
1619 | struct sw_flow_actions *sfa; | |
1620 | ||
426cda5c | 1621 | if (size > MAX_ACTIONS_BUFSIZE) { |
05da5898 | 1622 | OVS_NLERR(log, "Flow action size %u bytes exceeds max", size); |
e6445719 | 1623 | return ERR_PTR(-EINVAL); |
426cda5c | 1624 | } |
e6445719 PS |
1625 | |
1626 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); | |
1627 | if (!sfa) | |
1628 | return ERR_PTR(-ENOMEM); | |
1629 | ||
1630 | sfa->actions_len = 0; | |
1631 | return sfa; | |
1632 | } | |
1633 | ||
34ae932a TG |
1634 | static void ovs_nla_free_set_action(const struct nlattr *a) |
1635 | { | |
1636 | const struct nlattr *ovs_key = nla_data(a); | |
1637 | struct ovs_tunnel_info *ovs_tun; | |
1638 | ||
1639 | switch (nla_type(ovs_key)) { | |
1640 | case OVS_KEY_ATTR_TUNNEL_INFO: | |
1641 | ovs_tun = nla_data(ovs_key); | |
1642 | dst_release((struct dst_entry *)ovs_tun->tun_dst); | |
1643 | break; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) | |
1648 | { | |
1649 | const struct nlattr *a; | |
1650 | int rem; | |
1651 | ||
1652 | if (!sf_acts) | |
1653 | return; | |
1654 | ||
1655 | nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) { | |
1656 | switch (nla_type(a)) { | |
1657 | case OVS_ACTION_ATTR_SET: | |
1658 | ovs_nla_free_set_action(a); | |
1659 | break; | |
7f8a436e JS |
1660 | case OVS_ACTION_ATTR_CT: |
1661 | ovs_ct_free_action(a); | |
1662 | break; | |
34ae932a TG |
1663 | } |
1664 | } | |
1665 | ||
1666 | kfree(sf_acts); | |
1667 | } | |
1668 | ||
1669 | static void __ovs_nla_free_flow_actions(struct rcu_head *head) | |
1670 | { | |
1671 | ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu)); | |
1672 | } | |
1673 | ||
e6445719 PS |
1674 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
1675 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
34ae932a | 1676 | void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts) |
e6445719 | 1677 | { |
34ae932a | 1678 | call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions); |
e6445719 PS |
1679 | } |
1680 | ||
1681 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, | |
05da5898 | 1682 | int attr_len, bool log) |
e6445719 PS |
1683 | { |
1684 | ||
1685 | struct sw_flow_actions *acts; | |
1686 | int new_acts_size; | |
1687 | int req_size = NLA_ALIGN(attr_len); | |
1688 | int next_offset = offsetof(struct sw_flow_actions, actions) + | |
1689 | (*sfa)->actions_len; | |
1690 | ||
1691 | if (req_size <= (ksize(*sfa) - next_offset)) | |
1692 | goto out; | |
1693 | ||
1694 | new_acts_size = ksize(*sfa) * 2; | |
1695 | ||
1696 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { | |
1697 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) | |
1698 | return ERR_PTR(-EMSGSIZE); | |
1699 | new_acts_size = MAX_ACTIONS_BUFSIZE; | |
1700 | } | |
1701 | ||
05da5898 | 1702 | acts = nla_alloc_flow_actions(new_acts_size, log); |
e6445719 PS |
1703 | if (IS_ERR(acts)) |
1704 | return (void *)acts; | |
1705 | ||
1706 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); | |
1707 | acts->actions_len = (*sfa)->actions_len; | |
8e2fed1c | 1708 | acts->orig_len = (*sfa)->orig_len; |
e6445719 PS |
1709 | kfree(*sfa); |
1710 | *sfa = acts; | |
1711 | ||
1712 | out: | |
1713 | (*sfa)->actions_len += req_size; | |
1714 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); | |
1715 | } | |
1716 | ||
f0b128c1 | 1717 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
05da5898 | 1718 | int attrtype, void *data, int len, bool log) |
e6445719 PS |
1719 | { |
1720 | struct nlattr *a; | |
1721 | ||
05da5898 | 1722 | a = reserve_sfa_size(sfa, nla_attr_size(len), log); |
e6445719 | 1723 | if (IS_ERR(a)) |
f0b128c1 | 1724 | return a; |
e6445719 PS |
1725 | |
1726 | a->nla_type = attrtype; | |
1727 | a->nla_len = nla_attr_size(len); | |
1728 | ||
1729 | if (data) | |
1730 | memcpy(nla_data(a), data, len); | |
1731 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); | |
1732 | ||
f0b128c1 JG |
1733 | return a; |
1734 | } | |
1735 | ||
7f8a436e JS |
1736 | int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data, |
1737 | int len, bool log) | |
f0b128c1 JG |
1738 | { |
1739 | struct nlattr *a; | |
1740 | ||
05da5898 | 1741 | a = __add_action(sfa, attrtype, data, len, log); |
f0b128c1 | 1742 | |
f35423c1 | 1743 | return PTR_ERR_OR_ZERO(a); |
e6445719 PS |
1744 | } |
1745 | ||
1746 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, | |
05da5898 | 1747 | int attrtype, bool log) |
e6445719 PS |
1748 | { |
1749 | int used = (*sfa)->actions_len; | |
1750 | int err; | |
1751 | ||
7f8a436e | 1752 | err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log); |
e6445719 PS |
1753 | if (err) |
1754 | return err; | |
1755 | ||
1756 | return used; | |
1757 | } | |
1758 | ||
1759 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, | |
1760 | int st_offset) | |
1761 | { | |
1762 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + | |
1763 | st_offset); | |
1764 | ||
1765 | a->nla_len = sfa->actions_len - st_offset; | |
1766 | } | |
1767 | ||
7f8a436e | 1768 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
1769 | const struct sw_flow_key *key, |
1770 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 1771 | __be16 eth_type, __be16 vlan_tci, bool log); |
25cd9ba0 | 1772 | |
7f8a436e | 1773 | static int validate_and_copy_sample(struct net *net, const struct nlattr *attr, |
e6445719 | 1774 | const struct sw_flow_key *key, int depth, |
25cd9ba0 | 1775 | struct sw_flow_actions **sfa, |
05da5898 | 1776 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
1777 | { |
1778 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; | |
1779 | const struct nlattr *probability, *actions; | |
1780 | const struct nlattr *a; | |
1781 | int rem, start, err, st_acts; | |
1782 | ||
1783 | memset(attrs, 0, sizeof(attrs)); | |
1784 | nla_for_each_nested(a, attr, rem) { | |
1785 | int type = nla_type(a); | |
1786 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) | |
1787 | return -EINVAL; | |
1788 | attrs[type] = a; | |
1789 | } | |
1790 | if (rem) | |
1791 | return -EINVAL; | |
1792 | ||
1793 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; | |
1794 | if (!probability || nla_len(probability) != sizeof(u32)) | |
1795 | return -EINVAL; | |
1796 | ||
1797 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; | |
1798 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) | |
1799 | return -EINVAL; | |
1800 | ||
1801 | /* validation done, copy sample action. */ | |
05da5898 | 1802 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log); |
e6445719 PS |
1803 | if (start < 0) |
1804 | return start; | |
7f8a436e JS |
1805 | err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, |
1806 | nla_data(probability), sizeof(u32), log); | |
e6445719 PS |
1807 | if (err) |
1808 | return err; | |
05da5898 | 1809 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log); |
e6445719 PS |
1810 | if (st_acts < 0) |
1811 | return st_acts; | |
1812 | ||
7f8a436e | 1813 | err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa, |
05da5898 | 1814 | eth_type, vlan_tci, log); |
e6445719 PS |
1815 | if (err) |
1816 | return err; | |
1817 | ||
1818 | add_nested_action_end(*sfa, st_acts); | |
1819 | add_nested_action_end(*sfa, start); | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
e6445719 PS |
1824 | void ovs_match_init(struct sw_flow_match *match, |
1825 | struct sw_flow_key *key, | |
1826 | struct sw_flow_mask *mask) | |
1827 | { | |
1828 | memset(match, 0, sizeof(*match)); | |
1829 | match->key = key; | |
1830 | match->mask = mask; | |
1831 | ||
1832 | memset(key, 0, sizeof(*key)); | |
1833 | ||
1834 | if (mask) { | |
1835 | memset(&mask->key, 0, sizeof(mask->key)); | |
1836 | mask->range.start = mask->range.end = 0; | |
1837 | } | |
1838 | } | |
1839 | ||
d91641d9 TG |
1840 | static int validate_geneve_opts(struct sw_flow_key *key) |
1841 | { | |
1842 | struct geneve_opt *option; | |
1843 | int opts_len = key->tun_opts_len; | |
1844 | bool crit_opt = false; | |
1845 | ||
1846 | option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len); | |
1847 | while (opts_len > 0) { | |
1848 | int len; | |
1849 | ||
1850 | if (opts_len < sizeof(*option)) | |
1851 | return -EINVAL; | |
1852 | ||
1853 | len = sizeof(*option) + option->length * 4; | |
1854 | if (len > opts_len) | |
1855 | return -EINVAL; | |
1856 | ||
1857 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); | |
1858 | ||
1859 | option = (struct geneve_opt *)((u8 *)option + len); | |
1860 | opts_len -= len; | |
1861 | }; | |
1862 | ||
1863 | key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
e6445719 | 1868 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
05da5898 | 1869 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
1870 | { |
1871 | struct sw_flow_match match; | |
1872 | struct sw_flow_key key; | |
34ae932a | 1873 | struct metadata_dst *tun_dst; |
1d8fff90 | 1874 | struct ip_tunnel_info *tun_info; |
34ae932a | 1875 | struct ovs_tunnel_info *ovs_tun; |
f0b128c1 | 1876 | struct nlattr *a; |
13101602 | 1877 | int err = 0, start, opts_type; |
e6445719 PS |
1878 | |
1879 | ovs_match_init(&match, &key, NULL); | |
1dd144cf TG |
1880 | opts_type = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log); |
1881 | if (opts_type < 0) | |
1882 | return opts_type; | |
e6445719 | 1883 | |
f5796684 | 1884 | if (key.tun_opts_len) { |
1dd144cf TG |
1885 | switch (opts_type) { |
1886 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: | |
1887 | err = validate_geneve_opts(&key); | |
1888 | if (err < 0) | |
1889 | return err; | |
1890 | break; | |
1891 | case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS: | |
1892 | break; | |
1893 | } | |
f5796684 JG |
1894 | }; |
1895 | ||
05da5898 | 1896 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log); |
e6445719 PS |
1897 | if (start < 0) |
1898 | return start; | |
1899 | ||
34ae932a TG |
1900 | tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL); |
1901 | if (!tun_dst) | |
1902 | return -ENOMEM; | |
1903 | ||
f0b128c1 | 1904 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
34ae932a TG |
1905 | sizeof(*ovs_tun), log); |
1906 | if (IS_ERR(a)) { | |
1907 | dst_release((struct dst_entry *)tun_dst); | |
f0b128c1 | 1908 | return PTR_ERR(a); |
34ae932a TG |
1909 | } |
1910 | ||
1911 | ovs_tun = nla_data(a); | |
1912 | ovs_tun->tun_dst = tun_dst; | |
f0b128c1 | 1913 | |
34ae932a TG |
1914 | tun_info = &tun_dst->u.tun_info; |
1915 | tun_info->mode = IP_TUNNEL_INFO_TX; | |
1d8fff90 | 1916 | tun_info->key = key.tun_key; |
f0b128c1 | 1917 | |
4c222798 PS |
1918 | /* We need to store the options in the action itself since |
1919 | * everything else will go away after flow setup. We can append | |
1920 | * it to tun_info and then point there. | |
1921 | */ | |
1922 | ip_tunnel_info_opts_set(tun_info, | |
1923 | TUN_METADATA_OPTS(&key, key.tun_opts_len), | |
1924 | key.tun_opts_len); | |
e6445719 PS |
1925 | add_nested_action_end(*sfa, start); |
1926 | ||
1927 | return err; | |
1928 | } | |
1929 | ||
83d2b9ba JR |
1930 | /* Return false if there are any non-masked bits set. |
1931 | * Mask follows data immediately, before any netlink padding. | |
1932 | */ | |
1933 | static bool validate_masked(u8 *data, int len) | |
1934 | { | |
1935 | u8 *mask = data + len; | |
1936 | ||
1937 | while (len--) | |
1938 | if (*data++ & ~*mask++) | |
1939 | return false; | |
1940 | ||
1941 | return true; | |
1942 | } | |
1943 | ||
e6445719 PS |
1944 | static int validate_set(const struct nlattr *a, |
1945 | const struct sw_flow_key *flow_key, | |
1946 | struct sw_flow_actions **sfa, | |
83d2b9ba | 1947 | bool *skip_copy, __be16 eth_type, bool masked, bool log) |
e6445719 PS |
1948 | { |
1949 | const struct nlattr *ovs_key = nla_data(a); | |
1950 | int key_type = nla_type(ovs_key); | |
83d2b9ba | 1951 | size_t key_len; |
e6445719 PS |
1952 | |
1953 | /* There can be only one key in a action */ | |
1954 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
1955 | return -EINVAL; | |
1956 | ||
83d2b9ba JR |
1957 | key_len = nla_len(ovs_key); |
1958 | if (masked) | |
1959 | key_len /= 2; | |
1960 | ||
e6445719 | 1961 | if (key_type > OVS_KEY_ATTR_MAX || |
982b5270 | 1962 | !check_attr_len(key_len, ovs_key_lens[key_type].len)) |
e6445719 PS |
1963 | return -EINVAL; |
1964 | ||
83d2b9ba JR |
1965 | if (masked && !validate_masked(nla_data(ovs_key), key_len)) |
1966 | return -EINVAL; | |
1967 | ||
e6445719 PS |
1968 | switch (key_type) { |
1969 | const struct ovs_key_ipv4 *ipv4_key; | |
1970 | const struct ovs_key_ipv6 *ipv6_key; | |
1971 | int err; | |
1972 | ||
1973 | case OVS_KEY_ATTR_PRIORITY: | |
1974 | case OVS_KEY_ATTR_SKB_MARK: | |
182e3042 | 1975 | case OVS_KEY_ATTR_CT_MARK: |
c2ac6673 | 1976 | case OVS_KEY_ATTR_CT_LABEL: |
e6445719 PS |
1977 | case OVS_KEY_ATTR_ETHERNET: |
1978 | break; | |
1979 | ||
1980 | case OVS_KEY_ATTR_TUNNEL: | |
25cd9ba0 SH |
1981 | if (eth_p_mpls(eth_type)) |
1982 | return -EINVAL; | |
1983 | ||
83d2b9ba JR |
1984 | if (masked) |
1985 | return -EINVAL; /* Masked tunnel set not supported. */ | |
1986 | ||
1987 | *skip_copy = true; | |
05da5898 | 1988 | err = validate_and_copy_set_tun(a, sfa, log); |
e6445719 PS |
1989 | if (err) |
1990 | return err; | |
1991 | break; | |
1992 | ||
1993 | case OVS_KEY_ATTR_IPV4: | |
25cd9ba0 | 1994 | if (eth_type != htons(ETH_P_IP)) |
e6445719 PS |
1995 | return -EINVAL; |
1996 | ||
e6445719 | 1997 | ipv4_key = nla_data(ovs_key); |
e6445719 | 1998 | |
83d2b9ba JR |
1999 | if (masked) { |
2000 | const struct ovs_key_ipv4 *mask = ipv4_key + 1; | |
e6445719 | 2001 | |
83d2b9ba JR |
2002 | /* Non-writeable fields. */ |
2003 | if (mask->ipv4_proto || mask->ipv4_frag) | |
2004 | return -EINVAL; | |
2005 | } else { | |
2006 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
2007 | return -EINVAL; | |
2008 | ||
2009 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) | |
2010 | return -EINVAL; | |
2011 | } | |
e6445719 PS |
2012 | break; |
2013 | ||
2014 | case OVS_KEY_ATTR_IPV6: | |
25cd9ba0 | 2015 | if (eth_type != htons(ETH_P_IPV6)) |
e6445719 PS |
2016 | return -EINVAL; |
2017 | ||
e6445719 | 2018 | ipv6_key = nla_data(ovs_key); |
e6445719 | 2019 | |
83d2b9ba JR |
2020 | if (masked) { |
2021 | const struct ovs_key_ipv6 *mask = ipv6_key + 1; | |
2022 | ||
2023 | /* Non-writeable fields. */ | |
2024 | if (mask->ipv6_proto || mask->ipv6_frag) | |
2025 | return -EINVAL; | |
2026 | ||
2027 | /* Invalid bits in the flow label mask? */ | |
2028 | if (ntohl(mask->ipv6_label) & 0xFFF00000) | |
2029 | return -EINVAL; | |
2030 | } else { | |
2031 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) | |
2032 | return -EINVAL; | |
e6445719 | 2033 | |
83d2b9ba JR |
2034 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) |
2035 | return -EINVAL; | |
2036 | } | |
e6445719 PS |
2037 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
2038 | return -EINVAL; | |
2039 | ||
2040 | break; | |
2041 | ||
2042 | case OVS_KEY_ATTR_TCP: | |
83d2b9ba JR |
2043 | if ((eth_type != htons(ETH_P_IP) && |
2044 | eth_type != htons(ETH_P_IPV6)) || | |
2045 | flow_key->ip.proto != IPPROTO_TCP) | |
e6445719 PS |
2046 | return -EINVAL; |
2047 | ||
83d2b9ba | 2048 | break; |
e6445719 PS |
2049 | |
2050 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
2051 | if ((eth_type != htons(ETH_P_IP) && |
2052 | eth_type != htons(ETH_P_IPV6)) || | |
2053 | flow_key->ip.proto != IPPROTO_UDP) | |
e6445719 PS |
2054 | return -EINVAL; |
2055 | ||
83d2b9ba | 2056 | break; |
25cd9ba0 SH |
2057 | |
2058 | case OVS_KEY_ATTR_MPLS: | |
2059 | if (!eth_p_mpls(eth_type)) | |
2060 | return -EINVAL; | |
2061 | break; | |
e6445719 PS |
2062 | |
2063 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
2064 | if ((eth_type != htons(ETH_P_IP) && |
2065 | eth_type != htons(ETH_P_IPV6)) || | |
2066 | flow_key->ip.proto != IPPROTO_SCTP) | |
e6445719 PS |
2067 | return -EINVAL; |
2068 | ||
83d2b9ba | 2069 | break; |
e6445719 PS |
2070 | |
2071 | default: | |
2072 | return -EINVAL; | |
2073 | } | |
2074 | ||
83d2b9ba JR |
2075 | /* Convert non-masked non-tunnel set actions to masked set actions. */ |
2076 | if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) { | |
2077 | int start, len = key_len * 2; | |
2078 | struct nlattr *at; | |
2079 | ||
2080 | *skip_copy = true; | |
2081 | ||
2082 | start = add_nested_action_start(sfa, | |
2083 | OVS_ACTION_ATTR_SET_TO_MASKED, | |
2084 | log); | |
2085 | if (start < 0) | |
2086 | return start; | |
2087 | ||
2088 | at = __add_action(sfa, key_type, NULL, len, log); | |
2089 | if (IS_ERR(at)) | |
2090 | return PTR_ERR(at); | |
2091 | ||
2092 | memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */ | |
2093 | memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */ | |
2094 | /* Clear non-writeable bits from otherwise writeable fields. */ | |
2095 | if (key_type == OVS_KEY_ATTR_IPV6) { | |
2096 | struct ovs_key_ipv6 *mask = nla_data(at) + key_len; | |
2097 | ||
2098 | mask->ipv6_label &= htonl(0x000FFFFF); | |
2099 | } | |
2100 | add_nested_action_end(*sfa, start); | |
2101 | } | |
2102 | ||
e6445719 PS |
2103 | return 0; |
2104 | } | |
2105 | ||
2106 | static int validate_userspace(const struct nlattr *attr) | |
2107 | { | |
2108 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { | |
2109 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
2110 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, | |
8f0aad6f | 2111 | [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 }, |
e6445719 PS |
2112 | }; |
2113 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
2114 | int error; | |
2115 | ||
2116 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, | |
2117 | attr, userspace_policy); | |
2118 | if (error) | |
2119 | return error; | |
2120 | ||
2121 | if (!a[OVS_USERSPACE_ATTR_PID] || | |
2122 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
2123 | return -EINVAL; | |
2124 | ||
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | static int copy_action(const struct nlattr *from, | |
05da5898 | 2129 | struct sw_flow_actions **sfa, bool log) |
e6445719 PS |
2130 | { |
2131 | int totlen = NLA_ALIGN(from->nla_len); | |
2132 | struct nlattr *to; | |
2133 | ||
05da5898 | 2134 | to = reserve_sfa_size(sfa, from->nla_len, log); |
e6445719 PS |
2135 | if (IS_ERR(to)) |
2136 | return PTR_ERR(to); | |
2137 | ||
2138 | memcpy(to, from, totlen); | |
2139 | return 0; | |
2140 | } | |
2141 | ||
7f8a436e | 2142 | static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 SH |
2143 | const struct sw_flow_key *key, |
2144 | int depth, struct sw_flow_actions **sfa, | |
05da5898 | 2145 | __be16 eth_type, __be16 vlan_tci, bool log) |
e6445719 PS |
2146 | { |
2147 | const struct nlattr *a; | |
2148 | int rem, err; | |
2149 | ||
2150 | if (depth >= SAMPLE_ACTION_DEPTH) | |
2151 | return -EOVERFLOW; | |
2152 | ||
2153 | nla_for_each_nested(a, attr, rem) { | |
2154 | /* Expected argument lengths, (u32)-1 for variable length. */ | |
2155 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { | |
2156 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), | |
971427f3 | 2157 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
e6445719 | 2158 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
25cd9ba0 SH |
2159 | [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls), |
2160 | [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16), | |
e6445719 PS |
2161 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
2162 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
2163 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
83d2b9ba | 2164 | [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1, |
971427f3 | 2165 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
7f8a436e JS |
2166 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash), |
2167 | [OVS_ACTION_ATTR_CT] = (u32)-1, | |
e6445719 PS |
2168 | }; |
2169 | const struct ovs_action_push_vlan *vlan; | |
2170 | int type = nla_type(a); | |
2171 | bool skip_copy; | |
2172 | ||
2173 | if (type > OVS_ACTION_ATTR_MAX || | |
2174 | (action_lens[type] != nla_len(a) && | |
2175 | action_lens[type] != (u32)-1)) | |
2176 | return -EINVAL; | |
2177 | ||
2178 | skip_copy = false; | |
2179 | switch (type) { | |
2180 | case OVS_ACTION_ATTR_UNSPEC: | |
2181 | return -EINVAL; | |
2182 | ||
2183 | case OVS_ACTION_ATTR_USERSPACE: | |
2184 | err = validate_userspace(a); | |
2185 | if (err) | |
2186 | return err; | |
2187 | break; | |
2188 | ||
2189 | case OVS_ACTION_ATTR_OUTPUT: | |
2190 | if (nla_get_u32(a) >= DP_MAX_PORTS) | |
2191 | return -EINVAL; | |
2192 | break; | |
2193 | ||
971427f3 AZ |
2194 | case OVS_ACTION_ATTR_HASH: { |
2195 | const struct ovs_action_hash *act_hash = nla_data(a); | |
2196 | ||
2197 | switch (act_hash->hash_alg) { | |
2198 | case OVS_HASH_ALG_L4: | |
2199 | break; | |
2200 | default: | |
2201 | return -EINVAL; | |
2202 | } | |
2203 | ||
2204 | break; | |
2205 | } | |
e6445719 PS |
2206 | |
2207 | case OVS_ACTION_ATTR_POP_VLAN: | |
25cd9ba0 | 2208 | vlan_tci = htons(0); |
e6445719 PS |
2209 | break; |
2210 | ||
2211 | case OVS_ACTION_ATTR_PUSH_VLAN: | |
2212 | vlan = nla_data(a); | |
2213 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) | |
2214 | return -EINVAL; | |
2215 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) | |
2216 | return -EINVAL; | |
25cd9ba0 | 2217 | vlan_tci = vlan->vlan_tci; |
e6445719 PS |
2218 | break; |
2219 | ||
971427f3 AZ |
2220 | case OVS_ACTION_ATTR_RECIRC: |
2221 | break; | |
2222 | ||
25cd9ba0 SH |
2223 | case OVS_ACTION_ATTR_PUSH_MPLS: { |
2224 | const struct ovs_action_push_mpls *mpls = nla_data(a); | |
2225 | ||
25cd9ba0 SH |
2226 | if (!eth_p_mpls(mpls->mpls_ethertype)) |
2227 | return -EINVAL; | |
2228 | /* Prohibit push MPLS other than to a white list | |
2229 | * for packets that have a known tag order. | |
2230 | */ | |
2231 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2232 | (eth_type != htons(ETH_P_IP) && | |
2233 | eth_type != htons(ETH_P_IPV6) && | |
2234 | eth_type != htons(ETH_P_ARP) && | |
2235 | eth_type != htons(ETH_P_RARP) && | |
2236 | !eth_p_mpls(eth_type))) | |
2237 | return -EINVAL; | |
2238 | eth_type = mpls->mpls_ethertype; | |
2239 | break; | |
2240 | } | |
2241 | ||
2242 | case OVS_ACTION_ATTR_POP_MPLS: | |
2243 | if (vlan_tci & htons(VLAN_TAG_PRESENT) || | |
2244 | !eth_p_mpls(eth_type)) | |
2245 | return -EINVAL; | |
2246 | ||
2247 | /* Disallow subsequent L2.5+ set and mpls_pop actions | |
2248 | * as there is no check here to ensure that the new | |
2249 | * eth_type is valid and thus set actions could | |
2250 | * write off the end of the packet or otherwise | |
2251 | * corrupt it. | |
2252 | * | |
2253 | * Support for these actions is planned using packet | |
2254 | * recirculation. | |
2255 | */ | |
2256 | eth_type = htons(0); | |
2257 | break; | |
2258 | ||
e6445719 | 2259 | case OVS_ACTION_ATTR_SET: |
25cd9ba0 | 2260 | err = validate_set(a, key, sfa, |
83d2b9ba JR |
2261 | &skip_copy, eth_type, false, log); |
2262 | if (err) | |
2263 | return err; | |
2264 | break; | |
2265 | ||
2266 | case OVS_ACTION_ATTR_SET_MASKED: | |
2267 | err = validate_set(a, key, sfa, | |
2268 | &skip_copy, eth_type, true, log); | |
e6445719 PS |
2269 | if (err) |
2270 | return err; | |
2271 | break; | |
2272 | ||
2273 | case OVS_ACTION_ATTR_SAMPLE: | |
7f8a436e | 2274 | err = validate_and_copy_sample(net, a, key, depth, sfa, |
05da5898 | 2275 | eth_type, vlan_tci, log); |
e6445719 PS |
2276 | if (err) |
2277 | return err; | |
2278 | skip_copy = true; | |
2279 | break; | |
2280 | ||
7f8a436e JS |
2281 | case OVS_ACTION_ATTR_CT: |
2282 | err = ovs_ct_copy_action(net, a, key, sfa, log); | |
2283 | if (err) | |
2284 | return err; | |
2285 | skip_copy = true; | |
2286 | break; | |
2287 | ||
e6445719 | 2288 | default: |
05da5898 | 2289 | OVS_NLERR(log, "Unknown Action type %d", type); |
e6445719 PS |
2290 | return -EINVAL; |
2291 | } | |
2292 | if (!skip_copy) { | |
05da5898 | 2293 | err = copy_action(a, sfa, log); |
e6445719 PS |
2294 | if (err) |
2295 | return err; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | if (rem > 0) | |
2300 | return -EINVAL; | |
2301 | ||
2302 | return 0; | |
2303 | } | |
2304 | ||
83d2b9ba | 2305 | /* 'key' must be the masked key. */ |
7f8a436e | 2306 | int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr, |
25cd9ba0 | 2307 | const struct sw_flow_key *key, |
05da5898 | 2308 | struct sw_flow_actions **sfa, bool log) |
25cd9ba0 | 2309 | { |
2fdb957d PS |
2310 | int err; |
2311 | ||
05da5898 | 2312 | *sfa = nla_alloc_flow_actions(nla_len(attr), log); |
2fdb957d PS |
2313 | if (IS_ERR(*sfa)) |
2314 | return PTR_ERR(*sfa); | |
2315 | ||
8e2fed1c | 2316 | (*sfa)->orig_len = nla_len(attr); |
7f8a436e | 2317 | err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type, |
05da5898 | 2318 | key->eth.tci, log); |
2fdb957d | 2319 | if (err) |
34ae932a | 2320 | ovs_nla_free_flow_actions(*sfa); |
2fdb957d PS |
2321 | |
2322 | return err; | |
25cd9ba0 SH |
2323 | } |
2324 | ||
e6445719 PS |
2325 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
2326 | { | |
2327 | const struct nlattr *a; | |
2328 | struct nlattr *start; | |
2329 | int err = 0, rem; | |
2330 | ||
2331 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); | |
2332 | if (!start) | |
2333 | return -EMSGSIZE; | |
2334 | ||
2335 | nla_for_each_nested(a, attr, rem) { | |
2336 | int type = nla_type(a); | |
2337 | struct nlattr *st_sample; | |
2338 | ||
2339 | switch (type) { | |
2340 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
2341 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, | |
2342 | sizeof(u32), nla_data(a))) | |
2343 | return -EMSGSIZE; | |
2344 | break; | |
2345 | case OVS_SAMPLE_ATTR_ACTIONS: | |
2346 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); | |
2347 | if (!st_sample) | |
2348 | return -EMSGSIZE; | |
2349 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); | |
2350 | if (err) | |
2351 | return err; | |
2352 | nla_nest_end(skb, st_sample); | |
2353 | break; | |
2354 | } | |
2355 | } | |
2356 | ||
2357 | nla_nest_end(skb, start); | |
2358 | return err; | |
2359 | } | |
2360 | ||
2361 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) | |
2362 | { | |
2363 | const struct nlattr *ovs_key = nla_data(a); | |
2364 | int key_type = nla_type(ovs_key); | |
2365 | struct nlattr *start; | |
2366 | int err; | |
2367 | ||
2368 | switch (key_type) { | |
f0b128c1 | 2369 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
34ae932a TG |
2370 | struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key); |
2371 | struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info; | |
f0b128c1 | 2372 | |
e6445719 PS |
2373 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2374 | if (!start) | |
2375 | return -EMSGSIZE; | |
2376 | ||
1d8fff90 | 2377 | err = ipv4_tun_to_nlattr(skb, &tun_info->key, |
f5796684 | 2378 | tun_info->options_len ? |
4c222798 | 2379 | ip_tunnel_info_opts(tun_info) : NULL, |
f5796684 | 2380 | tun_info->options_len); |
e6445719 PS |
2381 | if (err) |
2382 | return err; | |
2383 | nla_nest_end(skb, start); | |
2384 | break; | |
f0b128c1 | 2385 | } |
e6445719 PS |
2386 | default: |
2387 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) | |
2388 | return -EMSGSIZE; | |
2389 | break; | |
2390 | } | |
2391 | ||
2392 | return 0; | |
2393 | } | |
2394 | ||
83d2b9ba JR |
2395 | static int masked_set_action_to_set_action_attr(const struct nlattr *a, |
2396 | struct sk_buff *skb) | |
2397 | { | |
2398 | const struct nlattr *ovs_key = nla_data(a); | |
f4f8e738 | 2399 | struct nlattr *nla; |
83d2b9ba JR |
2400 | size_t key_len = nla_len(ovs_key) / 2; |
2401 | ||
2402 | /* Revert the conversion we did from a non-masked set action to | |
2403 | * masked set action. | |
2404 | */ | |
f4f8e738 JS |
2405 | nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
2406 | if (!nla) | |
83d2b9ba JR |
2407 | return -EMSGSIZE; |
2408 | ||
f4f8e738 JS |
2409 | if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key))) |
2410 | return -EMSGSIZE; | |
2411 | ||
2412 | nla_nest_end(skb, nla); | |
83d2b9ba JR |
2413 | return 0; |
2414 | } | |
2415 | ||
e6445719 PS |
2416 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
2417 | { | |
2418 | const struct nlattr *a; | |
2419 | int rem, err; | |
2420 | ||
2421 | nla_for_each_attr(a, attr, len, rem) { | |
2422 | int type = nla_type(a); | |
2423 | ||
2424 | switch (type) { | |
2425 | case OVS_ACTION_ATTR_SET: | |
2426 | err = set_action_to_attr(a, skb); | |
2427 | if (err) | |
2428 | return err; | |
2429 | break; | |
2430 | ||
83d2b9ba JR |
2431 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
2432 | err = masked_set_action_to_set_action_attr(a, skb); | |
2433 | if (err) | |
2434 | return err; | |
2435 | break; | |
2436 | ||
e6445719 PS |
2437 | case OVS_ACTION_ATTR_SAMPLE: |
2438 | err = sample_action_to_attr(a, skb); | |
2439 | if (err) | |
2440 | return err; | |
2441 | break; | |
7f8a436e JS |
2442 | |
2443 | case OVS_ACTION_ATTR_CT: | |
2444 | err = ovs_ct_action_to_attr(nla_data(a), skb); | |
2445 | if (err) | |
2446 | return err; | |
2447 | break; | |
2448 | ||
e6445719 PS |
2449 | default: |
2450 | if (nla_put(skb, type, nla_len(a), nla_data(a))) | |
2451 | return -EMSGSIZE; | |
2452 | break; | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | return 0; | |
2457 | } |