blob: a6eb77ab1a6456768338a55290955bb29c69749a [file] [log] [blame]
Pravin B Shelare6445712013-10-03 18:16:47 -07001/*
Andy Zhou971427f32014-09-15 19:37:25 -07002 * Copyright (c) 2007-2014 Nicira, Inc.
Pravin B Shelare6445712013-10-03 18:16:47 -07003 *
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
Joe Perches2235ad12014-02-03 17:18:21 -080019#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
Pravin B Shelare6445712013-10-03 18:16:47 -070021#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>
Jesse Grossf5796682014-10-03 15:35:33 -070045#include <net/geneve.h>
Pravin B Shelare6445712013-10-03 18:16:47 -070046#include <net/ip.h>
47#include <net/ipv6.h>
48#include <net/ndisc.h>
Simon Horman25cd9ba2014-10-06 05:05:13 -070049#include <net/mpls.h>
Thomas Graf614732e2015-07-21 10:44:06 +020050#include <net/vxlan.h>
Pravin B Shelare6445712013-10-03 18:16:47 -070051
52#include "flow_netlink.h"
53
Thomas Graf81bfe3c2015-01-15 03:53:58 +010054struct ovs_len_tbl {
55 int len;
56 const struct ovs_len_tbl *next;
57};
58
59#define OVS_ATTR_NESTED -1
60
Pravin B Shelara85311b2014-10-19 12:03:40 -070061static void update_range(struct sw_flow_match *match,
62 size_t offset, size_t size, bool is_mask)
Pravin B Shelare6445712013-10-03 18:16:47 -070063{
Pravin B Shelara85311b2014-10-19 12:03:40 -070064 struct sw_flow_key_range *range;
Pravin B Shelare6445712013-10-03 18:16:47 -070065 size_t start = rounddown(offset, sizeof(long));
66 size_t end = roundup(offset + size, sizeof(long));
67
68 if (!is_mask)
69 range = &match->range;
Pravin B Shelara85311b2014-10-19 12:03:40 -070070 else
Pravin B Shelare6445712013-10-03 18:16:47 -070071 range = &match->mask->range;
72
Pravin B Shelare6445712013-10-03 18:16:47 -070073 if (range->start == range->end) {
74 range->start = start;
75 range->end = end;
76 return;
77 }
78
79 if (range->start > start)
80 range->start = start;
81
82 if (range->end < end)
83 range->end = end;
84}
85
86#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
87 do { \
Pravin B Shelara85311b2014-10-19 12:03:40 -070088 update_range(match, offsetof(struct sw_flow_key, field), \
89 sizeof((match)->key->field), is_mask); \
90 if (is_mask) \
91 (match)->mask->key.field = value; \
92 else \
Pravin B Shelare6445712013-10-03 18:16:47 -070093 (match)->key->field = value; \
Pravin B Shelare6445712013-10-03 18:16:47 -070094 } while (0)
95
Jesse Grossf5796682014-10-03 15:35:33 -070096#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
97 do { \
Pravin B Shelara85311b2014-10-19 12:03:40 -070098 update_range(match, offset, len, is_mask); \
Jesse Grossf5796682014-10-03 15:35:33 -070099 if (is_mask) \
100 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
Pravin B Shelara85311b2014-10-19 12:03:40 -0700101 len); \
Jesse Grossf5796682014-10-03 15:35:33 -0700102 else \
103 memcpy((u8 *)(match)->key + offset, value_p, len); \
Pravin B Shelare6445712013-10-03 18:16:47 -0700104 } while (0)
105
Jesse Grossf5796682014-10-03 15:35:33 -0700106#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
107 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
108 value_p, len, is_mask)
109
Pravin B Shelara85311b2014-10-19 12:03:40 -0700110#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
111 do { \
112 update_range(match, offsetof(struct sw_flow_key, field), \
113 sizeof((match)->key->field), is_mask); \
114 if (is_mask) \
115 memset((u8 *)&(match)->mask->key.field, value, \
116 sizeof((match)->mask->key.field)); \
117 else \
Pravin B Shelarf47de062014-10-16 21:55:45 -0700118 memset((u8 *)&(match)->key->field, value, \
119 sizeof((match)->key->field)); \
Pravin B Shelarf47de062014-10-16 21:55:45 -0700120 } while (0)
Pravin B Shelare6445712013-10-03 18:16:47 -0700121
122static bool match_validate(const struct sw_flow_match *match,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800123 u64 key_attrs, u64 mask_attrs, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700124{
125 u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
126 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
127
128 /* The following mask attributes allowed only if they
129 * pass the validation tests. */
130 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
131 | (1 << OVS_KEY_ATTR_IPV6)
132 | (1 << OVS_KEY_ATTR_TCP)
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700133 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
Pravin B Shelare6445712013-10-03 18:16:47 -0700134 | (1 << OVS_KEY_ATTR_UDP)
135 | (1 << OVS_KEY_ATTR_SCTP)
136 | (1 << OVS_KEY_ATTR_ICMP)
137 | (1 << OVS_KEY_ATTR_ICMPV6)
138 | (1 << OVS_KEY_ATTR_ARP)
Simon Horman25cd9ba2014-10-06 05:05:13 -0700139 | (1 << OVS_KEY_ATTR_ND)
140 | (1 << OVS_KEY_ATTR_MPLS));
Pravin B Shelare6445712013-10-03 18:16:47 -0700141
142 /* Always allowed mask fields. */
143 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
144 | (1 << OVS_KEY_ATTR_IN_PORT)
145 | (1 << OVS_KEY_ATTR_ETHERTYPE));
146
147 /* Check key attributes. */
148 if (match->key->eth.type == htons(ETH_P_ARP)
149 || match->key->eth.type == htons(ETH_P_RARP)) {
150 key_expected |= 1 << OVS_KEY_ATTR_ARP;
Pravin B Shelarf2a015172014-11-30 23:04:17 -0800151 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
Pravin B Shelare6445712013-10-03 18:16:47 -0700152 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
153 }
154
Simon Horman25cd9ba2014-10-06 05:05:13 -0700155 if (eth_p_mpls(match->key->eth.type)) {
156 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
157 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
158 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
159 }
160
Pravin B Shelare6445712013-10-03 18:16:47 -0700161 if (match->key->eth.type == htons(ETH_P_IP)) {
162 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
163 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
164 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
165
166 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
167 if (match->key->ip.proto == IPPROTO_UDP) {
168 key_expected |= 1 << OVS_KEY_ATTR_UDP;
169 if (match->mask && (match->mask->key.ip.proto == 0xff))
170 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
171 }
172
173 if (match->key->ip.proto == IPPROTO_SCTP) {
174 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
175 if (match->mask && (match->mask->key.ip.proto == 0xff))
176 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
177 }
178
179 if (match->key->ip.proto == IPPROTO_TCP) {
180 key_expected |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700181 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
182 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700183 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700184 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
185 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700186 }
187
188 if (match->key->ip.proto == IPPROTO_ICMP) {
189 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
190 if (match->mask && (match->mask->key.ip.proto == 0xff))
191 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
192 }
193 }
194 }
195
196 if (match->key->eth.type == htons(ETH_P_IPV6)) {
197 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
198 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
199 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
200
201 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
202 if (match->key->ip.proto == IPPROTO_UDP) {
203 key_expected |= 1 << OVS_KEY_ATTR_UDP;
204 if (match->mask && (match->mask->key.ip.proto == 0xff))
205 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
206 }
207
208 if (match->key->ip.proto == IPPROTO_SCTP) {
209 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
210 if (match->mask && (match->mask->key.ip.proto == 0xff))
211 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
212 }
213
214 if (match->key->ip.proto == IPPROTO_TCP) {
215 key_expected |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700216 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
217 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700218 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
220 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700221 }
222
223 if (match->key->ip.proto == IPPROTO_ICMPV6) {
224 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
225 if (match->mask && (match->mask->key.ip.proto == 0xff))
226 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
227
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700228 if (match->key->tp.src ==
Pravin B Shelare6445712013-10-03 18:16:47 -0700229 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700230 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700231 key_expected |= 1 << OVS_KEY_ATTR_ND;
Pravin B Shelarf2a015172014-11-30 23:04:17 -0800232 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
Pravin B Shelare6445712013-10-03 18:16:47 -0700233 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
234 }
235 }
236 }
237 }
238
239 if ((key_attrs & key_expected) != key_expected) {
240 /* Key attributes check failed. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800241 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
242 (unsigned long long)key_attrs,
243 (unsigned long long)key_expected);
Pravin B Shelare6445712013-10-03 18:16:47 -0700244 return false;
245 }
246
247 if ((mask_attrs & mask_allowed) != mask_attrs) {
248 /* Mask attributes check failed. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800249 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
250 (unsigned long long)mask_attrs,
251 (unsigned long long)mask_allowed);
Pravin B Shelare6445712013-10-03 18:16:47 -0700252 return false;
253 }
254
255 return true;
256}
257
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800258size_t ovs_tun_key_attr_size(void)
259{
260 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
261 * updating this function.
262 */
263 return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
264 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
265 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
266 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
267 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
268 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
269 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
270 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
271 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
Thomas Graf1dd144c2015-01-15 03:53:59 +0100272 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
273 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
274 */
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800275 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
276 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
277}
278
Joe Stringer41af73e2014-10-18 16:14:14 -0700279size_t ovs_key_attr_size(void)
280{
281 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
282 * updating this function.
283 */
284 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 22);
285
286 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
287 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800288 + ovs_tun_key_attr_size()
Joe Stringer41af73e2014-10-18 16:14:14 -0700289 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
290 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
291 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
292 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
293 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
294 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
295 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
296 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
297 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
298 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
299 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
300 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
301}
302
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100303static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
304 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
305 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
306 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
307 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
308 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
309 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
310 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
311 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
312 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
313 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
314 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_NESTED },
Thomas Graf1dd144c2015-01-15 03:53:59 +0100315 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED },
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100316};
317
Pravin B Shelare6445712013-10-03 18:16:47 -0700318/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100319static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
320 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
321 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
322 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
323 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
324 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
325 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
326 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
327 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
328 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
329 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
330 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
331 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
332 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
333 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
334 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
335 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
336 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
337 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
338 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
339 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
340 .next = ovs_tunnel_key_lens, },
341 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
Pravin B Shelare6445712013-10-03 18:16:47 -0700342};
343
344static bool is_all_zero(const u8 *fp, size_t size)
345{
346 int i;
347
348 if (!fp)
349 return false;
350
351 for (i = 0; i < size; i++)
352 if (fp[i])
353 return false;
354
355 return true;
356}
357
358static int __parse_flow_nlattrs(const struct nlattr *attr,
359 const struct nlattr *a[],
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800360 u64 *attrsp, bool log, bool nz)
Pravin B Shelare6445712013-10-03 18:16:47 -0700361{
362 const struct nlattr *nla;
363 u64 attrs;
364 int rem;
365
366 attrs = *attrsp;
367 nla_for_each_nested(nla, attr, rem) {
368 u16 type = nla_type(nla);
369 int expected_len;
370
371 if (type > OVS_KEY_ATTR_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800372 OVS_NLERR(log, "Key type %d is out of range max %d",
Pravin B Shelare6445712013-10-03 18:16:47 -0700373 type, OVS_KEY_ATTR_MAX);
374 return -EINVAL;
375 }
376
377 if (attrs & (1 << type)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800378 OVS_NLERR(log, "Duplicate key (type %d).", type);
Pravin B Shelare6445712013-10-03 18:16:47 -0700379 return -EINVAL;
380 }
381
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100382 expected_len = ovs_key_lens[type].len;
383 if (nla_len(nla) != expected_len && expected_len != OVS_ATTR_NESTED) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800384 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
385 type, nla_len(nla), expected_len);
Pravin B Shelare6445712013-10-03 18:16:47 -0700386 return -EINVAL;
387 }
388
389 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
390 attrs |= 1 << type;
391 a[type] = nla;
392 }
393 }
394 if (rem) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800395 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
Pravin B Shelare6445712013-10-03 18:16:47 -0700396 return -EINVAL;
397 }
398
399 *attrsp = attrs;
400 return 0;
401}
402
403static int parse_flow_mask_nlattrs(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800404 const struct nlattr *a[], u64 *attrsp,
405 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700406{
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800407 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
Pravin B Shelare6445712013-10-03 18:16:47 -0700408}
409
410static int parse_flow_nlattrs(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800411 const struct nlattr *a[], u64 *attrsp,
412 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700413{
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800414 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
415}
416
417static int genev_tun_opt_from_nlattr(const struct nlattr *a,
418 struct sw_flow_match *match, bool is_mask,
419 bool log)
420{
421 unsigned long opt_key_offset;
422
423 if (nla_len(a) > sizeof(match->key->tun_opts)) {
424 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
425 nla_len(a), sizeof(match->key->tun_opts));
426 return -EINVAL;
427 }
428
429 if (nla_len(a) % 4 != 0) {
430 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
431 nla_len(a));
432 return -EINVAL;
433 }
434
435 /* We need to record the length of the options passed
436 * down, otherwise packets with the same format but
437 * additional options will be silently matched.
438 */
439 if (!is_mask) {
440 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
441 false);
442 } else {
443 /* This is somewhat unusual because it looks at
444 * both the key and mask while parsing the
445 * attributes (and by extension assumes the key
446 * is parsed first). Normally, we would verify
447 * that each is the correct length and that the
448 * attributes line up in the validate function.
449 * However, that is difficult because this is
450 * variable length and we won't have the
451 * information later.
452 */
453 if (match->key->tun_opts_len != nla_len(a)) {
454 OVS_NLERR(log, "Geneve option len %d != mask len %d",
455 match->key->tun_opts_len, nla_len(a));
456 return -EINVAL;
457 }
458
459 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
460 }
461
Thomas Grafd91641d2015-01-15 03:53:57 +0100462 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800463 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
464 nla_len(a), is_mask);
465 return 0;
Pravin B Shelare6445712013-10-03 18:16:47 -0700466}
467
Thomas Graf1dd144c2015-01-15 03:53:59 +0100468static const struct nla_policy vxlan_opt_policy[OVS_VXLAN_EXT_MAX + 1] = {
469 [OVS_VXLAN_EXT_GBP] = { .type = NLA_U32 },
470};
471
472static int vxlan_tun_opt_from_nlattr(const struct nlattr *a,
473 struct sw_flow_match *match, bool is_mask,
474 bool log)
475{
476 struct nlattr *tb[OVS_VXLAN_EXT_MAX+1];
477 unsigned long opt_key_offset;
Thomas Graf614732e2015-07-21 10:44:06 +0200478 struct vxlan_metadata opts;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100479 int err;
480
481 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
482
483 err = nla_parse_nested(tb, OVS_VXLAN_EXT_MAX, a, vxlan_opt_policy);
484 if (err < 0)
485 return err;
486
487 memset(&opts, 0, sizeof(opts));
488
489 if (tb[OVS_VXLAN_EXT_GBP])
490 opts.gbp = nla_get_u32(tb[OVS_VXLAN_EXT_GBP]);
491
492 if (!is_mask)
493 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
494 else
495 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
496
497 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
498 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
499 is_mask);
500 return 0;
501}
502
Pravin B Shelare6445712013-10-03 18:16:47 -0700503static int ipv4_tun_from_nlattr(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800504 struct sw_flow_match *match, bool is_mask,
505 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700506{
507 struct nlattr *a;
508 int rem;
509 bool ttl = false;
510 __be16 tun_flags = 0;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100511 int opts_type = 0;
Pravin B Shelare6445712013-10-03 18:16:47 -0700512
513 nla_for_each_nested(a, attr, rem) {
514 int type = nla_type(a);
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800515 int err;
516
Pravin B Shelare6445712013-10-03 18:16:47 -0700517 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800518 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
519 type, OVS_TUNNEL_KEY_ATTR_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -0700520 return -EINVAL;
521 }
522
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100523 if (ovs_tunnel_key_lens[type].len != nla_len(a) &&
524 ovs_tunnel_key_lens[type].len != OVS_ATTR_NESTED) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800525 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100526 type, nla_len(a), ovs_tunnel_key_lens[type].len);
Pravin B Shelare6445712013-10-03 18:16:47 -0700527 return -EINVAL;
528 }
529
530 switch (type) {
531 case OVS_TUNNEL_KEY_ATTR_ID:
532 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
533 nla_get_be64(a), is_mask);
534 tun_flags |= TUNNEL_KEY;
535 break;
536 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
537 SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
Jiri Benc67b61f62015-03-29 16:59:26 +0200538 nla_get_in_addr(a), is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700539 break;
540 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
541 SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
Jiri Benc67b61f62015-03-29 16:59:26 +0200542 nla_get_in_addr(a), is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700543 break;
544 case OVS_TUNNEL_KEY_ATTR_TOS:
545 SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
546 nla_get_u8(a), is_mask);
547 break;
548 case OVS_TUNNEL_KEY_ATTR_TTL:
549 SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
550 nla_get_u8(a), is_mask);
551 ttl = true;
552 break;
553 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
554 tun_flags |= TUNNEL_DONT_FRAGMENT;
555 break;
556 case OVS_TUNNEL_KEY_ATTR_CSUM:
557 tun_flags |= TUNNEL_CSUM;
558 break;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800559 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
560 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
561 nla_get_be16(a), is_mask);
562 break;
563 case OVS_TUNNEL_KEY_ATTR_TP_DST:
564 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
565 nla_get_be16(a), is_mask);
566 break;
Jesse Gross67fa0342014-10-03 15:35:30 -0700567 case OVS_TUNNEL_KEY_ATTR_OAM:
568 tun_flags |= TUNNEL_OAM;
569 break;
Jesse Grossf5796682014-10-03 15:35:33 -0700570 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
Thomas Graf1dd144c2015-01-15 03:53:59 +0100571 if (opts_type) {
572 OVS_NLERR(log, "Multiple metadata blocks provided");
573 return -EINVAL;
574 }
575
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800576 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
577 if (err)
578 return err;
579
Thomas Graf1dd144c2015-01-15 03:53:59 +0100580 tun_flags |= TUNNEL_GENEVE_OPT;
581 opts_type = type;
582 break;
583 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
584 if (opts_type) {
585 OVS_NLERR(log, "Multiple metadata blocks provided");
586 return -EINVAL;
587 }
588
589 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
590 if (err)
591 return err;
592
593 tun_flags |= TUNNEL_VXLAN_OPT;
594 opts_type = type;
Jesse Grossf5796682014-10-03 15:35:33 -0700595 break;
Pravin B Shelare6445712013-10-03 18:16:47 -0700596 default:
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800597 OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d",
Jesse Grossf5796682014-10-03 15:35:33 -0700598 type);
Pravin B Shelare6445712013-10-03 18:16:47 -0700599 return -EINVAL;
600 }
601 }
602
603 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
604
605 if (rem > 0) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800606 OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.",
607 rem);
Pravin B Shelare6445712013-10-03 18:16:47 -0700608 return -EINVAL;
609 }
610
611 if (!is_mask) {
612 if (!match->key->tun_key.ipv4_dst) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800613 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
Pravin B Shelare6445712013-10-03 18:16:47 -0700614 return -EINVAL;
615 }
616
617 if (!ttl) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800618 OVS_NLERR(log, "IPv4 tunnel TTL not specified.");
Pravin B Shelare6445712013-10-03 18:16:47 -0700619 return -EINVAL;
620 }
621 }
622
Thomas Graf1dd144c2015-01-15 03:53:59 +0100623 return opts_type;
624}
625
626static int vxlan_opt_to_nlattr(struct sk_buff *skb,
627 const void *tun_opts, int swkey_tun_opts_len)
628{
Thomas Graf614732e2015-07-21 10:44:06 +0200629 const struct vxlan_metadata *opts = tun_opts;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100630 struct nlattr *nla;
631
632 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
633 if (!nla)
634 return -EMSGSIZE;
635
636 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
637 return -EMSGSIZE;
638
639 nla_nest_end(skb, nla);
Pravin B Shelare6445712013-10-03 18:16:47 -0700640 return 0;
641}
642
Jesse Grossf5796682014-10-03 15:35:33 -0700643static int __ipv4_tun_to_nlattr(struct sk_buff *skb,
Thomas Graf1d8fff92015-07-21 10:43:54 +0200644 const struct ip_tunnel_key *output,
Thomas Grafd91641d2015-01-15 03:53:57 +0100645 const void *tun_opts, int swkey_tun_opts_len)
Pravin B Shelare6445712013-10-03 18:16:47 -0700646{
Pravin B Shelare6445712013-10-03 18:16:47 -0700647 if (output->tun_flags & TUNNEL_KEY &&
648 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
649 return -EMSGSIZE;
650 if (output->ipv4_src &&
Jiri Benc930345e2015-03-29 16:59:25 +0200651 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
652 output->ipv4_src))
Pravin B Shelare6445712013-10-03 18:16:47 -0700653 return -EMSGSIZE;
654 if (output->ipv4_dst &&
Jiri Benc930345e2015-03-29 16:59:25 +0200655 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
656 output->ipv4_dst))
Pravin B Shelare6445712013-10-03 18:16:47 -0700657 return -EMSGSIZE;
658 if (output->ipv4_tos &&
Jesse Gross67fa0342014-10-03 15:35:30 -0700659 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
Pravin B Shelare6445712013-10-03 18:16:47 -0700660 return -EMSGSIZE;
661 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
662 return -EMSGSIZE;
663 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
Jesse Gross67fa0342014-10-03 15:35:30 -0700664 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
Pravin B Shelare6445712013-10-03 18:16:47 -0700665 return -EMSGSIZE;
666 if ((output->tun_flags & TUNNEL_CSUM) &&
Jesse Gross67fa0342014-10-03 15:35:30 -0700667 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
668 return -EMSGSIZE;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800669 if (output->tp_src &&
670 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
671 return -EMSGSIZE;
672 if (output->tp_dst &&
673 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
674 return -EMSGSIZE;
Jesse Gross67fa0342014-10-03 15:35:30 -0700675 if ((output->tun_flags & TUNNEL_OAM) &&
676 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
Pravin B Shelare6445712013-10-03 18:16:47 -0700677 return -EMSGSIZE;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100678 if (tun_opts) {
679 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
680 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
681 swkey_tun_opts_len, tun_opts))
682 return -EMSGSIZE;
683 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
684 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
685 return -EMSGSIZE;
686 }
Jesse Grossf5796682014-10-03 15:35:33 -0700687
688 return 0;
689}
690
Jesse Grossf5796682014-10-03 15:35:33 -0700691static int ipv4_tun_to_nlattr(struct sk_buff *skb,
Thomas Graf1d8fff92015-07-21 10:43:54 +0200692 const struct ip_tunnel_key *output,
Thomas Grafd91641d2015-01-15 03:53:57 +0100693 const void *tun_opts, int swkey_tun_opts_len)
Jesse Grossf5796682014-10-03 15:35:33 -0700694{
695 struct nlattr *nla;
696 int err;
697
698 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
699 if (!nla)
700 return -EMSGSIZE;
701
702 err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len);
703 if (err)
704 return err;
Pravin B Shelare6445712013-10-03 18:16:47 -0700705
706 nla_nest_end(skb, nla);
707 return 0;
708}
709
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800710int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb,
Thomas Graf1d8fff92015-07-21 10:43:54 +0200711 const struct ip_tunnel_info *egress_tun_info)
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800712{
Thomas Graf1d8fff92015-07-21 10:43:54 +0200713 return __ipv4_tun_to_nlattr(skb, &egress_tun_info->key,
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800714 egress_tun_info->options,
715 egress_tun_info->options_len);
716}
717
Pravin B Shelare6445712013-10-03 18:16:47 -0700718static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800719 const struct nlattr **a, bool is_mask,
720 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700721{
Andy Zhou971427f32014-09-15 19:37:25 -0700722 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
723 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
724
725 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
726 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
727 }
728
729 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
730 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
731
732 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
733 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
734 }
735
Pravin B Shelare6445712013-10-03 18:16:47 -0700736 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
737 SW_FLOW_KEY_PUT(match, phy.priority,
738 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
739 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
740 }
741
742 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
743 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
744
Jesse Gross426cda52014-10-06 05:08:38 -0700745 if (is_mask) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700746 in_port = 0xffffffff; /* Always exact match in_port. */
Jesse Gross426cda52014-10-06 05:08:38 -0700747 } else if (in_port >= DP_MAX_PORTS) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800748 OVS_NLERR(log, "Port %d exceeds max allowable %d",
Jesse Gross426cda52014-10-06 05:08:38 -0700749 in_port, DP_MAX_PORTS);
Pravin B Shelare6445712013-10-03 18:16:47 -0700750 return -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -0700751 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700752
753 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
754 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
755 } else if (!is_mask) {
756 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
757 }
758
759 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
760 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
761
762 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
763 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
764 }
765 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
766 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
Thomas Graf1dd144c2015-01-15 03:53:59 +0100767 is_mask, log) < 0)
Pravin B Shelare6445712013-10-03 18:16:47 -0700768 return -EINVAL;
769 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
770 }
771 return 0;
772}
773
Jarno Rajahalme23dabf82014-03-27 12:35:23 -0700774static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800775 const struct nlattr **a, bool is_mask,
776 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700777{
778 int err;
Pravin B Shelare6445712013-10-03 18:16:47 -0700779
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800780 err = metadata_from_nlattrs(match, &attrs, a, is_mask, log);
Pravin B Shelare6445712013-10-03 18:16:47 -0700781 if (err)
782 return err;
783
784 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
785 const struct ovs_key_ethernet *eth_key;
786
787 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
788 SW_FLOW_KEY_MEMCPY(match, eth.src,
789 eth_key->eth_src, ETH_ALEN, is_mask);
790 SW_FLOW_KEY_MEMCPY(match, eth.dst,
791 eth_key->eth_dst, ETH_ALEN, is_mask);
792 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
793 }
794
795 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
796 __be16 tci;
797
798 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
799 if (!(tci & htons(VLAN_TAG_PRESENT))) {
800 if (is_mask)
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800801 OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
Pravin B Shelare6445712013-10-03 18:16:47 -0700802 else
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800803 OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
Pravin B Shelare6445712013-10-03 18:16:47 -0700804
805 return -EINVAL;
806 }
807
808 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
809 attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
Pravin B Shelara85311b2014-10-19 12:03:40 -0700810 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700811
812 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
813 __be16 eth_type;
814
815 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
816 if (is_mask) {
817 /* Always exact match EtherType. */
818 eth_type = htons(0xffff);
Alexander Duyck6713fc92015-05-04 14:34:05 -0700819 } else if (!eth_proto_is_802_3(eth_type)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800820 OVS_NLERR(log, "EtherType %x is less than min %x",
821 ntohs(eth_type), ETH_P_802_3_MIN);
Pravin B Shelare6445712013-10-03 18:16:47 -0700822 return -EINVAL;
823 }
824
825 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
826 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
827 } else if (!is_mask) {
828 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
829 }
830
831 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
832 const struct ovs_key_ipv4 *ipv4_key;
833
834 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
835 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800836 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
837 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -0700838 return -EINVAL;
839 }
840 SW_FLOW_KEY_PUT(match, ip.proto,
841 ipv4_key->ipv4_proto, is_mask);
842 SW_FLOW_KEY_PUT(match, ip.tos,
843 ipv4_key->ipv4_tos, is_mask);
844 SW_FLOW_KEY_PUT(match, ip.ttl,
845 ipv4_key->ipv4_ttl, is_mask);
846 SW_FLOW_KEY_PUT(match, ip.frag,
847 ipv4_key->ipv4_frag, is_mask);
848 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
849 ipv4_key->ipv4_src, is_mask);
850 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
851 ipv4_key->ipv4_dst, is_mask);
852 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
853 }
854
855 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
856 const struct ovs_key_ipv6 *ipv6_key;
857
858 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
859 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800860 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
861 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -0700862 return -EINVAL;
863 }
Jarno Rajahalmefecaef82014-11-11 14:36:30 -0800864
Joe Stringerd3052bb2014-11-19 13:54:49 -0800865 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
David S. Miller14591432014-11-21 22:28:24 -0500866 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
Jarno Rajahalmefecaef82014-11-11 14:36:30 -0800867 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
868 return -EINVAL;
869 }
870
Pravin B Shelare6445712013-10-03 18:16:47 -0700871 SW_FLOW_KEY_PUT(match, ipv6.label,
872 ipv6_key->ipv6_label, is_mask);
873 SW_FLOW_KEY_PUT(match, ip.proto,
874 ipv6_key->ipv6_proto, is_mask);
875 SW_FLOW_KEY_PUT(match, ip.tos,
876 ipv6_key->ipv6_tclass, is_mask);
877 SW_FLOW_KEY_PUT(match, ip.ttl,
878 ipv6_key->ipv6_hlimit, is_mask);
879 SW_FLOW_KEY_PUT(match, ip.frag,
880 ipv6_key->ipv6_frag, is_mask);
881 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
882 ipv6_key->ipv6_src,
883 sizeof(match->key->ipv6.addr.src),
884 is_mask);
885 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
886 ipv6_key->ipv6_dst,
887 sizeof(match->key->ipv6.addr.dst),
888 is_mask);
889
890 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
891 }
892
893 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
894 const struct ovs_key_arp *arp_key;
895
896 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
897 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800898 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
Pravin B Shelare6445712013-10-03 18:16:47 -0700899 arp_key->arp_op);
900 return -EINVAL;
901 }
902
903 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
904 arp_key->arp_sip, is_mask);
905 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
906 arp_key->arp_tip, is_mask);
907 SW_FLOW_KEY_PUT(match, ip.proto,
908 ntohs(arp_key->arp_op), is_mask);
909 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
910 arp_key->arp_sha, ETH_ALEN, is_mask);
911 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
912 arp_key->arp_tha, ETH_ALEN, is_mask);
913
914 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
915 }
916
Simon Horman25cd9ba2014-10-06 05:05:13 -0700917 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
918 const struct ovs_key_mpls *mpls_key;
919
920 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
921 SW_FLOW_KEY_PUT(match, mpls.top_lse,
922 mpls_key->mpls_lse, is_mask);
923
924 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
925 }
926
Pravin B Shelare6445712013-10-03 18:16:47 -0700927 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
928 const struct ovs_key_tcp *tcp_key;
929
930 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700931 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
932 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700933 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
934 }
935
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700936 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
Joe Stringer1b760fb2014-09-07 22:11:08 -0700937 SW_FLOW_KEY_PUT(match, tp.flags,
938 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
939 is_mask);
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700940 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
941 }
942
Pravin B Shelare6445712013-10-03 18:16:47 -0700943 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
944 const struct ovs_key_udp *udp_key;
945
946 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700947 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
948 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700949 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
950 }
951
952 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
953 const struct ovs_key_sctp *sctp_key;
954
955 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700956 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
957 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -0700958 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
959 }
960
961 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
962 const struct ovs_key_icmp *icmp_key;
963
964 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700965 SW_FLOW_KEY_PUT(match, tp.src,
Pravin B Shelare6445712013-10-03 18:16:47 -0700966 htons(icmp_key->icmp_type), is_mask);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700967 SW_FLOW_KEY_PUT(match, tp.dst,
Pravin B Shelare6445712013-10-03 18:16:47 -0700968 htons(icmp_key->icmp_code), is_mask);
969 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
970 }
971
972 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
973 const struct ovs_key_icmpv6 *icmpv6_key;
974
975 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700976 SW_FLOW_KEY_PUT(match, tp.src,
Pravin B Shelare6445712013-10-03 18:16:47 -0700977 htons(icmpv6_key->icmpv6_type), is_mask);
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700978 SW_FLOW_KEY_PUT(match, tp.dst,
Pravin B Shelare6445712013-10-03 18:16:47 -0700979 htons(icmpv6_key->icmpv6_code), is_mask);
980 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
981 }
982
983 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
984 const struct ovs_key_nd *nd_key;
985
986 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
987 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
988 nd_key->nd_target,
989 sizeof(match->key->ipv6.nd.target),
990 is_mask);
991 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
992 nd_key->nd_sll, ETH_ALEN, is_mask);
993 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
994 nd_key->nd_tll, ETH_ALEN, is_mask);
995 attrs &= ~(1 << OVS_KEY_ATTR_ND);
996 }
997
Jesse Gross426cda52014-10-06 05:08:38 -0700998 if (attrs != 0) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800999 OVS_NLERR(log, "Unknown key attributes %llx",
Jesse Gross426cda52014-10-06 05:08:38 -07001000 (unsigned long long)attrs);
Pravin B Shelare6445712013-10-03 18:16:47 -07001001 return -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -07001002 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001003
1004 return 0;
1005}
1006
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001007static void nlattr_set(struct nlattr *attr, u8 val,
1008 const struct ovs_len_tbl *tbl)
Pravin B Shelare6445712013-10-03 18:16:47 -07001009{
Pravin B Shelarf47de062014-10-16 21:55:45 -07001010 struct nlattr *nla;
1011 int rem;
Pravin B Shelare6445712013-10-03 18:16:47 -07001012
Pravin B Shelarf47de062014-10-16 21:55:45 -07001013 /* The nlattr stream should already have been validated */
1014 nla_for_each_nested(nla, attr, rem) {
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001015 if (tbl && tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1016 nlattr_set(nla, val, tbl[nla_type(nla)].next);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001017 else
1018 memset(nla_data(nla), val, nla_len(nla));
1019 }
1020}
1021
1022static void mask_set_nlattr(struct nlattr *attr, u8 val)
1023{
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001024 nlattr_set(attr, val, ovs_key_lens);
Pravin B Shelare6445712013-10-03 18:16:47 -07001025}
1026
1027/**
1028 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1029 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1030 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1031 * does not include any don't care bit.
1032 * @match: receives the extracted flow match information.
1033 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1034 * sequence. The fields should of the packet that triggered the creation
1035 * of this flow.
1036 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1037 * attribute specifies the mask field of the wildcarded flow.
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001038 * @log: Boolean to allow kernel error logging. Normally true, but when
1039 * probing for feature compatibility this should be passed in as false to
1040 * suppress unnecessary error logging.
Pravin B Shelare6445712013-10-03 18:16:47 -07001041 */
1042int ovs_nla_get_match(struct sw_flow_match *match,
Pravin B Shelara85311b2014-10-19 12:03:40 -07001043 const struct nlattr *nla_key,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001044 const struct nlattr *nla_mask,
1045 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001046{
1047 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1048 const struct nlattr *encap;
Pravin B Shelarf47de062014-10-16 21:55:45 -07001049 struct nlattr *newmask = NULL;
Pravin B Shelare6445712013-10-03 18:16:47 -07001050 u64 key_attrs = 0;
1051 u64 mask_attrs = 0;
1052 bool encap_valid = false;
1053 int err;
1054
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001055 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001056 if (err)
1057 return err;
1058
1059 if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
1060 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
1061 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
1062 __be16 tci;
1063
1064 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
1065 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001066 OVS_NLERR(log, "Invalid Vlan frame.");
Pravin B Shelare6445712013-10-03 18:16:47 -07001067 return -EINVAL;
1068 }
1069
1070 key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1071 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1072 encap = a[OVS_KEY_ATTR_ENCAP];
1073 key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1074 encap_valid = true;
1075
1076 if (tci & htons(VLAN_TAG_PRESENT)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001077 err = parse_flow_nlattrs(encap, a, &key_attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001078 if (err)
1079 return err;
1080 } else if (!tci) {
1081 /* Corner case for truncated 802.1Q header. */
1082 if (nla_len(encap)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001083 OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
Pravin B Shelare6445712013-10-03 18:16:47 -07001084 return -EINVAL;
1085 }
1086 } else {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001087 OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
Pravin B Shelare6445712013-10-03 18:16:47 -07001088 return -EINVAL;
1089 }
1090 }
1091
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001092 err = ovs_key_from_nlattrs(match, key_attrs, a, false, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001093 if (err)
1094 return err;
1095
Pravin B Shelara85311b2014-10-19 12:03:40 -07001096 if (match->mask) {
1097 if (!nla_mask) {
1098 /* Create an exact match mask. We need to set to 0xff
1099 * all the 'match->mask' fields that have been touched
1100 * in 'match->key'. We cannot simply memset
1101 * 'match->mask', because padding bytes and fields not
1102 * specified in 'match->key' should be left to 0.
1103 * Instead, we use a stream of netlink attributes,
1104 * copied from 'key' and set to 0xff.
1105 * ovs_key_from_nlattrs() will take care of filling
1106 * 'match->mask' appropriately.
1107 */
1108 newmask = kmemdup(nla_key,
1109 nla_total_size(nla_len(nla_key)),
1110 GFP_KERNEL);
1111 if (!newmask)
1112 return -ENOMEM;
Pravin B Shelarf47de062014-10-16 21:55:45 -07001113
Pravin B Shelara85311b2014-10-19 12:03:40 -07001114 mask_set_nlattr(newmask, 0xff);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001115
Pravin B Shelara85311b2014-10-19 12:03:40 -07001116 /* The userspace does not send tunnel attributes that
1117 * are 0, but we should not wildcard them nonetheless.
1118 */
1119 if (match->key->tun_key.ipv4_dst)
1120 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1121 0xff, true);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001122
Pravin B Shelara85311b2014-10-19 12:03:40 -07001123 nla_mask = newmask;
1124 }
Pravin B Shelarf47de062014-10-16 21:55:45 -07001125
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001126 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001127 if (err)
Pravin B Shelarf47de062014-10-16 21:55:45 -07001128 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001129
Pravin B Shelara85311b2014-10-19 12:03:40 -07001130 /* Always match on tci. */
1131 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
1132
Pravin B Shelarf47de062014-10-16 21:55:45 -07001133 if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
Pravin B Shelare6445712013-10-03 18:16:47 -07001134 __be16 eth_type = 0;
1135 __be16 tci = 0;
1136
1137 if (!encap_valid) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001138 OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
Pravin B Shelarf47de062014-10-16 21:55:45 -07001139 err = -EINVAL;
1140 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001141 }
1142
1143 mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1144 if (a[OVS_KEY_ATTR_ETHERTYPE])
1145 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1146
1147 if (eth_type == htons(0xffff)) {
1148 mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1149 encap = a[OVS_KEY_ATTR_ENCAP];
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001150 err = parse_flow_mask_nlattrs(encap, a,
1151 &mask_attrs, log);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001152 if (err)
1153 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001154 } else {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001155 OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
1156 ntohs(eth_type));
Pravin B Shelarf47de062014-10-16 21:55:45 -07001157 err = -EINVAL;
1158 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001159 }
1160
1161 if (a[OVS_KEY_ATTR_VLAN])
1162 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1163
1164 if (!(tci & htons(VLAN_TAG_PRESENT))) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001165 OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
1166 ntohs(tci));
Pravin B Shelarf47de062014-10-16 21:55:45 -07001167 err = -EINVAL;
1168 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001169 }
1170 }
1171
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001172 err = ovs_key_from_nlattrs(match, mask_attrs, a, true, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001173 if (err)
Pravin B Shelarf47de062014-10-16 21:55:45 -07001174 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001175 }
1176
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001177 if (!match_validate(match, key_attrs, mask_attrs, log))
Pravin B Shelarf47de062014-10-16 21:55:45 -07001178 err = -EINVAL;
Pravin B Shelare6445712013-10-03 18:16:47 -07001179
Pravin B Shelarf47de062014-10-16 21:55:45 -07001180free_newmask:
1181 kfree(newmask);
1182 return err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001183}
1184
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001185static size_t get_ufid_len(const struct nlattr *attr, bool log)
1186{
1187 size_t len;
1188
1189 if (!attr)
1190 return 0;
1191
1192 len = nla_len(attr);
1193 if (len < 1 || len > MAX_UFID_LENGTH) {
1194 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1195 nla_len(attr), MAX_UFID_LENGTH);
1196 return 0;
1197 }
1198
1199 return len;
1200}
1201
1202/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1203 * or false otherwise.
1204 */
1205bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1206 bool log)
1207{
1208 sfid->ufid_len = get_ufid_len(attr, log);
1209 if (sfid->ufid_len)
1210 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1211
1212 return sfid->ufid_len;
1213}
1214
1215int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1216 const struct sw_flow_key *key, bool log)
1217{
1218 struct sw_flow_key *new_key;
1219
1220 if (ovs_nla_get_ufid(sfid, ufid, log))
1221 return 0;
1222
1223 /* If UFID was not provided, use unmasked key. */
1224 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1225 if (!new_key)
1226 return -ENOMEM;
1227 memcpy(new_key, key, sizeof(*key));
1228 sfid->unmasked_key = new_key;
1229
1230 return 0;
1231}
1232
1233u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1234{
1235 return attr ? nla_get_u32(attr) : 0;
1236}
1237
Pravin B Shelare6445712013-10-03 18:16:47 -07001238/**
1239 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001240 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
Pravin B Shelare6445712013-10-03 18:16:47 -07001241 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1242 * sequence.
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001243 * @log: Boolean to allow kernel error logging. Normally true, but when
1244 * probing for feature compatibility this should be passed in as false to
1245 * suppress unnecessary error logging.
Pravin B Shelare6445712013-10-03 18:16:47 -07001246 *
1247 * This parses a series of Netlink attributes that form a flow key, which must
1248 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1249 * get the metadata, that is, the parts of the flow key that cannot be
1250 * extracted from the packet itself.
1251 */
1252
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001253int ovs_nla_get_flow_metadata(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001254 struct sw_flow_key *key,
1255 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001256{
Pravin B Shelare6445712013-10-03 18:16:47 -07001257 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001258 struct sw_flow_match match;
Pravin B Shelare6445712013-10-03 18:16:47 -07001259 u64 attrs = 0;
1260 int err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001261
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001262 err = parse_flow_nlattrs(attr, a, &attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001263 if (err)
1264 return -EINVAL;
1265
1266 memset(&match, 0, sizeof(match));
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001267 match.key = key;
Pravin B Shelare6445712013-10-03 18:16:47 -07001268
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001269 key->phy.in_port = DP_MAX_PORTS;
Pravin B Shelare6445712013-10-03 18:16:47 -07001270
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001271 return metadata_from_nlattrs(&match, &attrs, a, false, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001272}
1273
Joe Stringer5b4237b2015-01-21 16:42:48 -08001274static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1275 const struct sw_flow_key *output, bool is_mask,
1276 struct sk_buff *skb)
Pravin B Shelare6445712013-10-03 18:16:47 -07001277{
1278 struct ovs_key_ethernet *eth_key;
1279 struct nlattr *nla, *encap;
Pravin B Shelare6445712013-10-03 18:16:47 -07001280
Andy Zhou971427f32014-09-15 19:37:25 -07001281 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1282 goto nla_put_failure;
1283
1284 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1285 goto nla_put_failure;
1286
Pravin B Shelare6445712013-10-03 18:16:47 -07001287 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1288 goto nla_put_failure;
1289
Jesse Grossf5796682014-10-03 15:35:33 -07001290 if ((swkey->tun_key.ipv4_dst || is_mask)) {
Thomas Grafd91641d2015-01-15 03:53:57 +01001291 const void *opts = NULL;
Jesse Grossf5796682014-10-03 15:35:33 -07001292
1293 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
Thomas Grafd91641d2015-01-15 03:53:57 +01001294 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
Jesse Grossf5796682014-10-03 15:35:33 -07001295
1296 if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts,
1297 swkey->tun_opts_len))
1298 goto nla_put_failure;
1299 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001300
1301 if (swkey->phy.in_port == DP_MAX_PORTS) {
1302 if (is_mask && (output->phy.in_port == 0xffff))
1303 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1304 goto nla_put_failure;
1305 } else {
1306 u16 upper_u16;
1307 upper_u16 = !is_mask ? 0 : 0xffff;
1308
1309 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1310 (upper_u16 << 16) | output->phy.in_port))
1311 goto nla_put_failure;
1312 }
1313
1314 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1315 goto nla_put_failure;
1316
1317 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1318 if (!nla)
1319 goto nla_put_failure;
1320
1321 eth_key = nla_data(nla);
Joe Perches8c63ff02014-02-18 11:15:45 -08001322 ether_addr_copy(eth_key->eth_src, output->eth.src);
1323 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001324
1325 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1326 __be16 eth_type;
1327 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1328 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1329 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1330 goto nla_put_failure;
1331 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1332 if (!swkey->eth.tci)
1333 goto unencap;
1334 } else
1335 encap = NULL;
1336
1337 if (swkey->eth.type == htons(ETH_P_802_2)) {
1338 /*
1339 * Ethertype 802.2 is represented in the netlink with omitted
1340 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1341 * 0xffff in the mask attribute. Ethertype can also
1342 * be wildcarded.
1343 */
1344 if (is_mask && output->eth.type)
1345 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1346 output->eth.type))
1347 goto nla_put_failure;
1348 goto unencap;
1349 }
1350
1351 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1352 goto nla_put_failure;
1353
1354 if (swkey->eth.type == htons(ETH_P_IP)) {
1355 struct ovs_key_ipv4 *ipv4_key;
1356
1357 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1358 if (!nla)
1359 goto nla_put_failure;
1360 ipv4_key = nla_data(nla);
1361 ipv4_key->ipv4_src = output->ipv4.addr.src;
1362 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1363 ipv4_key->ipv4_proto = output->ip.proto;
1364 ipv4_key->ipv4_tos = output->ip.tos;
1365 ipv4_key->ipv4_ttl = output->ip.ttl;
1366 ipv4_key->ipv4_frag = output->ip.frag;
1367 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1368 struct ovs_key_ipv6 *ipv6_key;
1369
1370 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1371 if (!nla)
1372 goto nla_put_failure;
1373 ipv6_key = nla_data(nla);
1374 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1375 sizeof(ipv6_key->ipv6_src));
1376 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1377 sizeof(ipv6_key->ipv6_dst));
1378 ipv6_key->ipv6_label = output->ipv6.label;
1379 ipv6_key->ipv6_proto = output->ip.proto;
1380 ipv6_key->ipv6_tclass = output->ip.tos;
1381 ipv6_key->ipv6_hlimit = output->ip.ttl;
1382 ipv6_key->ipv6_frag = output->ip.frag;
1383 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1384 swkey->eth.type == htons(ETH_P_RARP)) {
1385 struct ovs_key_arp *arp_key;
1386
1387 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1388 if (!nla)
1389 goto nla_put_failure;
1390 arp_key = nla_data(nla);
1391 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1392 arp_key->arp_sip = output->ipv4.addr.src;
1393 arp_key->arp_tip = output->ipv4.addr.dst;
1394 arp_key->arp_op = htons(output->ip.proto);
Joe Perches8c63ff02014-02-18 11:15:45 -08001395 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1396 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
Simon Horman25cd9ba2014-10-06 05:05:13 -07001397 } else if (eth_p_mpls(swkey->eth.type)) {
1398 struct ovs_key_mpls *mpls_key;
1399
1400 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1401 if (!nla)
1402 goto nla_put_failure;
1403 mpls_key = nla_data(nla);
1404 mpls_key->mpls_lse = output->mpls.top_lse;
Pravin B Shelare6445712013-10-03 18:16:47 -07001405 }
1406
1407 if ((swkey->eth.type == htons(ETH_P_IP) ||
1408 swkey->eth.type == htons(ETH_P_IPV6)) &&
1409 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1410
1411 if (swkey->ip.proto == IPPROTO_TCP) {
1412 struct ovs_key_tcp *tcp_key;
1413
1414 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1415 if (!nla)
1416 goto nla_put_failure;
1417 tcp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001418 tcp_key->tcp_src = output->tp.src;
1419 tcp_key->tcp_dst = output->tp.dst;
1420 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1421 output->tp.flags))
1422 goto nla_put_failure;
Pravin B Shelare6445712013-10-03 18:16:47 -07001423 } else if (swkey->ip.proto == IPPROTO_UDP) {
1424 struct ovs_key_udp *udp_key;
1425
1426 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1427 if (!nla)
1428 goto nla_put_failure;
1429 udp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001430 udp_key->udp_src = output->tp.src;
1431 udp_key->udp_dst = output->tp.dst;
Pravin B Shelare6445712013-10-03 18:16:47 -07001432 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1433 struct ovs_key_sctp *sctp_key;
1434
1435 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1436 if (!nla)
1437 goto nla_put_failure;
1438 sctp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001439 sctp_key->sctp_src = output->tp.src;
1440 sctp_key->sctp_dst = output->tp.dst;
Pravin B Shelare6445712013-10-03 18:16:47 -07001441 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1442 swkey->ip.proto == IPPROTO_ICMP) {
1443 struct ovs_key_icmp *icmp_key;
1444
1445 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1446 if (!nla)
1447 goto nla_put_failure;
1448 icmp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001449 icmp_key->icmp_type = ntohs(output->tp.src);
1450 icmp_key->icmp_code = ntohs(output->tp.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001451 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1452 swkey->ip.proto == IPPROTO_ICMPV6) {
1453 struct ovs_key_icmpv6 *icmpv6_key;
1454
1455 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1456 sizeof(*icmpv6_key));
1457 if (!nla)
1458 goto nla_put_failure;
1459 icmpv6_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001460 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1461 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001462
1463 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1464 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1465 struct ovs_key_nd *nd_key;
1466
1467 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1468 if (!nla)
1469 goto nla_put_failure;
1470 nd_key = nla_data(nla);
1471 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1472 sizeof(nd_key->nd_target));
Joe Perches8c63ff02014-02-18 11:15:45 -08001473 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1474 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
Pravin B Shelare6445712013-10-03 18:16:47 -07001475 }
1476 }
1477 }
1478
1479unencap:
1480 if (encap)
1481 nla_nest_end(skb, encap);
1482
1483 return 0;
1484
1485nla_put_failure:
1486 return -EMSGSIZE;
1487}
1488
Joe Stringer5b4237b2015-01-21 16:42:48 -08001489int ovs_nla_put_key(const struct sw_flow_key *swkey,
1490 const struct sw_flow_key *output, int attr, bool is_mask,
1491 struct sk_buff *skb)
1492{
1493 int err;
1494 struct nlattr *nla;
1495
1496 nla = nla_nest_start(skb, attr);
1497 if (!nla)
1498 return -EMSGSIZE;
1499 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1500 if (err)
1501 return err;
1502 nla_nest_end(skb, nla);
1503
1504 return 0;
1505}
1506
1507/* Called with ovs_mutex or RCU read lock. */
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001508int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
Joe Stringer5b4237b2015-01-21 16:42:48 -08001509{
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001510 if (ovs_identifier_is_ufid(&flow->id))
1511 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1512 flow->id.ufid);
1513
1514 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1515 OVS_FLOW_ATTR_KEY, false, skb);
1516}
1517
1518/* Called with ovs_mutex or RCU read lock. */
1519int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1520{
Pravin B Shelar26ad0b82015-02-12 09:58:48 -08001521 return ovs_nla_put_key(&flow->key, &flow->key,
Joe Stringer5b4237b2015-01-21 16:42:48 -08001522 OVS_FLOW_ATTR_KEY, false, skb);
1523}
1524
1525/* Called with ovs_mutex or RCU read lock. */
1526int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1527{
1528 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1529 OVS_FLOW_ATTR_MASK, true, skb);
1530}
1531
Pravin B Shelare6445712013-10-03 18:16:47 -07001532#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1533
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001534static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001535{
1536 struct sw_flow_actions *sfa;
1537
Jesse Gross426cda52014-10-06 05:08:38 -07001538 if (size > MAX_ACTIONS_BUFSIZE) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001539 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
Pravin B Shelare6445712013-10-03 18:16:47 -07001540 return ERR_PTR(-EINVAL);
Jesse Gross426cda52014-10-06 05:08:38 -07001541 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001542
1543 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1544 if (!sfa)
1545 return ERR_PTR(-ENOMEM);
1546
1547 sfa->actions_len = 0;
1548 return sfa;
1549}
1550
Thomas Graf34ae9322015-07-21 10:44:03 +02001551static void ovs_nla_free_set_action(const struct nlattr *a)
1552{
1553 const struct nlattr *ovs_key = nla_data(a);
1554 struct ovs_tunnel_info *ovs_tun;
1555
1556 switch (nla_type(ovs_key)) {
1557 case OVS_KEY_ATTR_TUNNEL_INFO:
1558 ovs_tun = nla_data(ovs_key);
1559 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1560 break;
1561 }
1562}
1563
Pravin B Shelare6445712013-10-03 18:16:47 -07001564void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1565{
Thomas Graf34ae9322015-07-21 10:44:03 +02001566 const struct nlattr *a;
1567 int rem;
1568
1569 if (!sf_acts)
1570 return;
1571
1572 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1573 switch (nla_type(a)) {
1574 case OVS_ACTION_ATTR_SET:
1575 ovs_nla_free_set_action(a);
1576 break;
1577 }
1578 }
1579
1580 kfree(sf_acts);
1581}
1582
1583static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1584{
1585 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1586}
1587
1588/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1589 * The caller must hold rcu_read_lock for this to be sensible. */
1590void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1591{
1592 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
Pravin B Shelare6445712013-10-03 18:16:47 -07001593}
1594
1595static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001596 int attr_len, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001597{
1598
1599 struct sw_flow_actions *acts;
1600 int new_acts_size;
1601 int req_size = NLA_ALIGN(attr_len);
1602 int next_offset = offsetof(struct sw_flow_actions, actions) +
1603 (*sfa)->actions_len;
1604
1605 if (req_size <= (ksize(*sfa) - next_offset))
1606 goto out;
1607
1608 new_acts_size = ksize(*sfa) * 2;
1609
1610 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1611 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1612 return ERR_PTR(-EMSGSIZE);
1613 new_acts_size = MAX_ACTIONS_BUFSIZE;
1614 }
1615
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001616 acts = nla_alloc_flow_actions(new_acts_size, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001617 if (IS_ERR(acts))
1618 return (void *)acts;
1619
1620 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1621 acts->actions_len = (*sfa)->actions_len;
1622 kfree(*sfa);
1623 *sfa = acts;
1624
1625out:
1626 (*sfa)->actions_len += req_size;
1627 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1628}
1629
Jesse Grossf0b128c2014-10-03 15:35:31 -07001630static struct nlattr *__add_action(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001631 int attrtype, void *data, int len, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001632{
1633 struct nlattr *a;
1634
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001635 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001636 if (IS_ERR(a))
Jesse Grossf0b128c2014-10-03 15:35:31 -07001637 return a;
Pravin B Shelare6445712013-10-03 18:16:47 -07001638
1639 a->nla_type = attrtype;
1640 a->nla_len = nla_attr_size(len);
1641
1642 if (data)
1643 memcpy(nla_data(a), data, len);
1644 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1645
Jesse Grossf0b128c2014-10-03 15:35:31 -07001646 return a;
1647}
1648
1649static int add_action(struct sw_flow_actions **sfa, int attrtype,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001650 void *data, int len, bool log)
Jesse Grossf0b128c2014-10-03 15:35:31 -07001651{
1652 struct nlattr *a;
1653
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001654 a = __add_action(sfa, attrtype, data, len, log);
Jesse Grossf0b128c2014-10-03 15:35:31 -07001655
Fabian Frederickf35423c12014-11-14 19:32:58 +01001656 return PTR_ERR_OR_ZERO(a);
Pravin B Shelare6445712013-10-03 18:16:47 -07001657}
1658
1659static inline int add_nested_action_start(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001660 int attrtype, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001661{
1662 int used = (*sfa)->actions_len;
1663 int err;
1664
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001665 err = add_action(sfa, attrtype, NULL, 0, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001666 if (err)
1667 return err;
1668
1669 return used;
1670}
1671
1672static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1673 int st_offset)
1674{
1675 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1676 st_offset);
1677
1678 a->nla_len = sfa->actions_len - st_offset;
1679}
1680
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07001681static int __ovs_nla_copy_actions(const struct nlattr *attr,
Simon Horman25cd9ba2014-10-06 05:05:13 -07001682 const struct sw_flow_key *key,
1683 int depth, struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001684 __be16 eth_type, __be16 vlan_tci, bool log);
Simon Horman25cd9ba2014-10-06 05:05:13 -07001685
Pravin B Shelare6445712013-10-03 18:16:47 -07001686static int validate_and_copy_sample(const struct nlattr *attr,
1687 const struct sw_flow_key *key, int depth,
Simon Horman25cd9ba2014-10-06 05:05:13 -07001688 struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001689 __be16 eth_type, __be16 vlan_tci, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001690{
1691 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1692 const struct nlattr *probability, *actions;
1693 const struct nlattr *a;
1694 int rem, start, err, st_acts;
1695
1696 memset(attrs, 0, sizeof(attrs));
1697 nla_for_each_nested(a, attr, rem) {
1698 int type = nla_type(a);
1699 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1700 return -EINVAL;
1701 attrs[type] = a;
1702 }
1703 if (rem)
1704 return -EINVAL;
1705
1706 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1707 if (!probability || nla_len(probability) != sizeof(u32))
1708 return -EINVAL;
1709
1710 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1711 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1712 return -EINVAL;
1713
1714 /* validation done, copy sample action. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001715 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001716 if (start < 0)
1717 return start;
1718 err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001719 nla_data(probability), sizeof(u32), log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001720 if (err)
1721 return err;
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001722 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001723 if (st_acts < 0)
1724 return st_acts;
1725
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07001726 err = __ovs_nla_copy_actions(actions, key, depth + 1, sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001727 eth_type, vlan_tci, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001728 if (err)
1729 return err;
1730
1731 add_nested_action_end(*sfa, st_acts);
1732 add_nested_action_end(*sfa, start);
1733
1734 return 0;
1735}
1736
Pravin B Shelare6445712013-10-03 18:16:47 -07001737void ovs_match_init(struct sw_flow_match *match,
1738 struct sw_flow_key *key,
1739 struct sw_flow_mask *mask)
1740{
1741 memset(match, 0, sizeof(*match));
1742 match->key = key;
1743 match->mask = mask;
1744
1745 memset(key, 0, sizeof(*key));
1746
1747 if (mask) {
1748 memset(&mask->key, 0, sizeof(mask->key));
1749 mask->range.start = mask->range.end = 0;
1750 }
1751}
1752
Thomas Grafd91641d2015-01-15 03:53:57 +01001753static int validate_geneve_opts(struct sw_flow_key *key)
1754{
1755 struct geneve_opt *option;
1756 int opts_len = key->tun_opts_len;
1757 bool crit_opt = false;
1758
1759 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
1760 while (opts_len > 0) {
1761 int len;
1762
1763 if (opts_len < sizeof(*option))
1764 return -EINVAL;
1765
1766 len = sizeof(*option) + option->length * 4;
1767 if (len > opts_len)
1768 return -EINVAL;
1769
1770 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1771
1772 option = (struct geneve_opt *)((u8 *)option + len);
1773 opts_len -= len;
1774 };
1775
1776 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1777
1778 return 0;
1779}
1780
Pravin B Shelare6445712013-10-03 18:16:47 -07001781static int validate_and_copy_set_tun(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001782 struct sw_flow_actions **sfa, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001783{
1784 struct sw_flow_match match;
1785 struct sw_flow_key key;
Thomas Graf34ae9322015-07-21 10:44:03 +02001786 struct metadata_dst *tun_dst;
Thomas Graf1d8fff92015-07-21 10:43:54 +02001787 struct ip_tunnel_info *tun_info;
Thomas Graf34ae9322015-07-21 10:44:03 +02001788 struct ovs_tunnel_info *ovs_tun;
Jesse Grossf0b128c2014-10-03 15:35:31 -07001789 struct nlattr *a;
Geert Uytterhoeven13101602015-02-11 11:23:38 +01001790 int err = 0, start, opts_type;
Pravin B Shelare6445712013-10-03 18:16:47 -07001791
1792 ovs_match_init(&match, &key, NULL);
Thomas Graf1dd144c2015-01-15 03:53:59 +01001793 opts_type = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log);
1794 if (opts_type < 0)
1795 return opts_type;
Pravin B Shelare6445712013-10-03 18:16:47 -07001796
Jesse Grossf5796682014-10-03 15:35:33 -07001797 if (key.tun_opts_len) {
Thomas Graf1dd144c2015-01-15 03:53:59 +01001798 switch (opts_type) {
1799 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1800 err = validate_geneve_opts(&key);
1801 if (err < 0)
1802 return err;
1803 break;
1804 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
1805 break;
1806 }
Jesse Grossf5796682014-10-03 15:35:33 -07001807 };
1808
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001809 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001810 if (start < 0)
1811 return start;
1812
Thomas Graf34ae9322015-07-21 10:44:03 +02001813 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
1814 if (!tun_dst)
1815 return -ENOMEM;
Jesse Grossf0b128c2014-10-03 15:35:31 -07001816
Thomas Graf34ae9322015-07-21 10:44:03 +02001817 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
1818 sizeof(*ovs_tun), log);
1819 if (IS_ERR(a)) {
1820 dst_release((struct dst_entry *)tun_dst);
1821 return PTR_ERR(a);
1822 }
1823
1824 ovs_tun = nla_data(a);
1825 ovs_tun->tun_dst = tun_dst;
1826
1827 tun_info = &tun_dst->u.tun_info;
1828 tun_info->mode = IP_TUNNEL_INFO_TX;
Thomas Graf1d8fff92015-07-21 10:43:54 +02001829 tun_info->key = key.tun_key;
Jesse Grossf5796682014-10-03 15:35:33 -07001830 tun_info->options_len = key.tun_opts_len;
1831
1832 if (tun_info->options_len) {
1833 /* We need to store the options in the action itself since
1834 * everything else will go away after flow setup. We can append
1835 * it to tun_info and then point there.
1836 */
Thomas Grafd91641d2015-01-15 03:53:57 +01001837 memcpy((tun_info + 1),
1838 TUN_METADATA_OPTS(&key, key.tun_opts_len), key.tun_opts_len);
1839 tun_info->options = (tun_info + 1);
Jesse Grossf5796682014-10-03 15:35:33 -07001840 } else {
1841 tun_info->options = NULL;
1842 }
Jesse Grossf0b128c2014-10-03 15:35:31 -07001843
Pravin B Shelare6445712013-10-03 18:16:47 -07001844 add_nested_action_end(*sfa, start);
1845
1846 return err;
1847}
1848
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001849/* Return false if there are any non-masked bits set.
1850 * Mask follows data immediately, before any netlink padding.
1851 */
1852static bool validate_masked(u8 *data, int len)
1853{
1854 u8 *mask = data + len;
1855
1856 while (len--)
1857 if (*data++ & ~*mask++)
1858 return false;
1859
1860 return true;
1861}
1862
Pravin B Shelare6445712013-10-03 18:16:47 -07001863static int validate_set(const struct nlattr *a,
1864 const struct sw_flow_key *flow_key,
1865 struct sw_flow_actions **sfa,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001866 bool *skip_copy, __be16 eth_type, bool masked, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001867{
1868 const struct nlattr *ovs_key = nla_data(a);
1869 int key_type = nla_type(ovs_key);
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001870 size_t key_len;
Pravin B Shelare6445712013-10-03 18:16:47 -07001871
1872 /* There can be only one key in a action */
1873 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1874 return -EINVAL;
1875
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001876 key_len = nla_len(ovs_key);
1877 if (masked)
1878 key_len /= 2;
1879
Pravin B Shelare6445712013-10-03 18:16:47 -07001880 if (key_type > OVS_KEY_ATTR_MAX ||
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001881 (ovs_key_lens[key_type].len != key_len &&
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001882 ovs_key_lens[key_type].len != OVS_ATTR_NESTED))
Pravin B Shelare6445712013-10-03 18:16:47 -07001883 return -EINVAL;
1884
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001885 if (masked && !validate_masked(nla_data(ovs_key), key_len))
1886 return -EINVAL;
1887
Pravin B Shelare6445712013-10-03 18:16:47 -07001888 switch (key_type) {
1889 const struct ovs_key_ipv4 *ipv4_key;
1890 const struct ovs_key_ipv6 *ipv6_key;
1891 int err;
1892
1893 case OVS_KEY_ATTR_PRIORITY:
1894 case OVS_KEY_ATTR_SKB_MARK:
1895 case OVS_KEY_ATTR_ETHERNET:
1896 break;
1897
1898 case OVS_KEY_ATTR_TUNNEL:
Simon Horman25cd9ba2014-10-06 05:05:13 -07001899 if (eth_p_mpls(eth_type))
1900 return -EINVAL;
1901
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001902 if (masked)
1903 return -EINVAL; /* Masked tunnel set not supported. */
1904
1905 *skip_copy = true;
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001906 err = validate_and_copy_set_tun(a, sfa, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001907 if (err)
1908 return err;
1909 break;
1910
1911 case OVS_KEY_ATTR_IPV4:
Simon Horman25cd9ba2014-10-06 05:05:13 -07001912 if (eth_type != htons(ETH_P_IP))
Pravin B Shelare6445712013-10-03 18:16:47 -07001913 return -EINVAL;
1914
Pravin B Shelare6445712013-10-03 18:16:47 -07001915 ipv4_key = nla_data(ovs_key);
Pravin B Shelare6445712013-10-03 18:16:47 -07001916
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001917 if (masked) {
1918 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
Pravin B Shelare6445712013-10-03 18:16:47 -07001919
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001920 /* Non-writeable fields. */
1921 if (mask->ipv4_proto || mask->ipv4_frag)
1922 return -EINVAL;
1923 } else {
1924 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1925 return -EINVAL;
1926
1927 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1928 return -EINVAL;
1929 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001930 break;
1931
1932 case OVS_KEY_ATTR_IPV6:
Simon Horman25cd9ba2014-10-06 05:05:13 -07001933 if (eth_type != htons(ETH_P_IPV6))
Pravin B Shelare6445712013-10-03 18:16:47 -07001934 return -EINVAL;
1935
Pravin B Shelare6445712013-10-03 18:16:47 -07001936 ipv6_key = nla_data(ovs_key);
Pravin B Shelare6445712013-10-03 18:16:47 -07001937
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001938 if (masked) {
1939 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
Pravin B Shelare6445712013-10-03 18:16:47 -07001940
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001941 /* Non-writeable fields. */
1942 if (mask->ipv6_proto || mask->ipv6_frag)
1943 return -EINVAL;
1944
1945 /* Invalid bits in the flow label mask? */
1946 if (ntohl(mask->ipv6_label) & 0xFFF00000)
1947 return -EINVAL;
1948 } else {
1949 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1950 return -EINVAL;
1951
1952 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1953 return -EINVAL;
1954 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001955 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1956 return -EINVAL;
1957
1958 break;
1959
1960 case OVS_KEY_ATTR_TCP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001961 if ((eth_type != htons(ETH_P_IP) &&
1962 eth_type != htons(ETH_P_IPV6)) ||
1963 flow_key->ip.proto != IPPROTO_TCP)
Pravin B Shelare6445712013-10-03 18:16:47 -07001964 return -EINVAL;
1965
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001966 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07001967
1968 case OVS_KEY_ATTR_UDP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001969 if ((eth_type != htons(ETH_P_IP) &&
1970 eth_type != htons(ETH_P_IPV6)) ||
1971 flow_key->ip.proto != IPPROTO_UDP)
Pravin B Shelare6445712013-10-03 18:16:47 -07001972 return -EINVAL;
1973
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001974 break;
Simon Horman25cd9ba2014-10-06 05:05:13 -07001975
1976 case OVS_KEY_ATTR_MPLS:
1977 if (!eth_p_mpls(eth_type))
1978 return -EINVAL;
1979 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07001980
1981 case OVS_KEY_ATTR_SCTP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001982 if ((eth_type != htons(ETH_P_IP) &&
1983 eth_type != htons(ETH_P_IPV6)) ||
1984 flow_key->ip.proto != IPPROTO_SCTP)
Pravin B Shelare6445712013-10-03 18:16:47 -07001985 return -EINVAL;
1986
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001987 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07001988
1989 default:
1990 return -EINVAL;
1991 }
1992
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08001993 /* Convert non-masked non-tunnel set actions to masked set actions. */
1994 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
1995 int start, len = key_len * 2;
1996 struct nlattr *at;
1997
1998 *skip_copy = true;
1999
2000 start = add_nested_action_start(sfa,
2001 OVS_ACTION_ATTR_SET_TO_MASKED,
2002 log);
2003 if (start < 0)
2004 return start;
2005
2006 at = __add_action(sfa, key_type, NULL, len, log);
2007 if (IS_ERR(at))
2008 return PTR_ERR(at);
2009
2010 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2011 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2012 /* Clear non-writeable bits from otherwise writeable fields. */
2013 if (key_type == OVS_KEY_ATTR_IPV6) {
2014 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2015
2016 mask->ipv6_label &= htonl(0x000FFFFF);
2017 }
2018 add_nested_action_end(*sfa, start);
2019 }
2020
Pravin B Shelare6445712013-10-03 18:16:47 -07002021 return 0;
2022}
2023
2024static int validate_userspace(const struct nlattr *attr)
2025{
2026 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2027 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2028 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
Wenyu Zhang8f0aad62014-11-06 06:51:24 -08002029 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
Pravin B Shelare6445712013-10-03 18:16:47 -07002030 };
2031 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2032 int error;
2033
2034 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2035 attr, userspace_policy);
2036 if (error)
2037 return error;
2038
2039 if (!a[OVS_USERSPACE_ATTR_PID] ||
2040 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2041 return -EINVAL;
2042
2043 return 0;
2044}
2045
2046static int copy_action(const struct nlattr *from,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002047 struct sw_flow_actions **sfa, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002048{
2049 int totlen = NLA_ALIGN(from->nla_len);
2050 struct nlattr *to;
2051
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002052 to = reserve_sfa_size(sfa, from->nla_len, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002053 if (IS_ERR(to))
2054 return PTR_ERR(to);
2055
2056 memcpy(to, from, totlen);
2057 return 0;
2058}
2059
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002060static int __ovs_nla_copy_actions(const struct nlattr *attr,
Simon Horman25cd9ba2014-10-06 05:05:13 -07002061 const struct sw_flow_key *key,
2062 int depth, struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002063 __be16 eth_type, __be16 vlan_tci, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002064{
2065 const struct nlattr *a;
2066 int rem, err;
2067
2068 if (depth >= SAMPLE_ACTION_DEPTH)
2069 return -EOVERFLOW;
2070
2071 nla_for_each_nested(a, attr, rem) {
2072 /* Expected argument lengths, (u32)-1 for variable length. */
2073 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2074 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
Andy Zhou971427f32014-09-15 19:37:25 -07002075 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
Pravin B Shelare6445712013-10-03 18:16:47 -07002076 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
Simon Horman25cd9ba2014-10-06 05:05:13 -07002077 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2078 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
Pravin B Shelare6445712013-10-03 18:16:47 -07002079 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2080 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2081 [OVS_ACTION_ATTR_SET] = (u32)-1,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002082 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
Andy Zhou971427f32014-09-15 19:37:25 -07002083 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2084 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash)
Pravin B Shelare6445712013-10-03 18:16:47 -07002085 };
2086 const struct ovs_action_push_vlan *vlan;
2087 int type = nla_type(a);
2088 bool skip_copy;
2089
2090 if (type > OVS_ACTION_ATTR_MAX ||
2091 (action_lens[type] != nla_len(a) &&
2092 action_lens[type] != (u32)-1))
2093 return -EINVAL;
2094
2095 skip_copy = false;
2096 switch (type) {
2097 case OVS_ACTION_ATTR_UNSPEC:
2098 return -EINVAL;
2099
2100 case OVS_ACTION_ATTR_USERSPACE:
2101 err = validate_userspace(a);
2102 if (err)
2103 return err;
2104 break;
2105
2106 case OVS_ACTION_ATTR_OUTPUT:
2107 if (nla_get_u32(a) >= DP_MAX_PORTS)
2108 return -EINVAL;
2109 break;
2110
Andy Zhou971427f32014-09-15 19:37:25 -07002111 case OVS_ACTION_ATTR_HASH: {
2112 const struct ovs_action_hash *act_hash = nla_data(a);
2113
2114 switch (act_hash->hash_alg) {
2115 case OVS_HASH_ALG_L4:
2116 break;
2117 default:
2118 return -EINVAL;
2119 }
2120
2121 break;
2122 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002123
2124 case OVS_ACTION_ATTR_POP_VLAN:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002125 vlan_tci = htons(0);
Pravin B Shelare6445712013-10-03 18:16:47 -07002126 break;
2127
2128 case OVS_ACTION_ATTR_PUSH_VLAN:
2129 vlan = nla_data(a);
2130 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
2131 return -EINVAL;
2132 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2133 return -EINVAL;
Simon Horman25cd9ba2014-10-06 05:05:13 -07002134 vlan_tci = vlan->vlan_tci;
Pravin B Shelare6445712013-10-03 18:16:47 -07002135 break;
2136
Andy Zhou971427f32014-09-15 19:37:25 -07002137 case OVS_ACTION_ATTR_RECIRC:
2138 break;
2139
Simon Horman25cd9ba2014-10-06 05:05:13 -07002140 case OVS_ACTION_ATTR_PUSH_MPLS: {
2141 const struct ovs_action_push_mpls *mpls = nla_data(a);
2142
Simon Horman25cd9ba2014-10-06 05:05:13 -07002143 if (!eth_p_mpls(mpls->mpls_ethertype))
2144 return -EINVAL;
2145 /* Prohibit push MPLS other than to a white list
2146 * for packets that have a known tag order.
2147 */
2148 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2149 (eth_type != htons(ETH_P_IP) &&
2150 eth_type != htons(ETH_P_IPV6) &&
2151 eth_type != htons(ETH_P_ARP) &&
2152 eth_type != htons(ETH_P_RARP) &&
2153 !eth_p_mpls(eth_type)))
2154 return -EINVAL;
2155 eth_type = mpls->mpls_ethertype;
2156 break;
2157 }
2158
2159 case OVS_ACTION_ATTR_POP_MPLS:
2160 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2161 !eth_p_mpls(eth_type))
2162 return -EINVAL;
2163
2164 /* Disallow subsequent L2.5+ set and mpls_pop actions
2165 * as there is no check here to ensure that the new
2166 * eth_type is valid and thus set actions could
2167 * write off the end of the packet or otherwise
2168 * corrupt it.
2169 *
2170 * Support for these actions is planned using packet
2171 * recirculation.
2172 */
2173 eth_type = htons(0);
2174 break;
2175
Pravin B Shelare6445712013-10-03 18:16:47 -07002176 case OVS_ACTION_ATTR_SET:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002177 err = validate_set(a, key, sfa,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002178 &skip_copy, eth_type, false, log);
2179 if (err)
2180 return err;
2181 break;
2182
2183 case OVS_ACTION_ATTR_SET_MASKED:
2184 err = validate_set(a, key, sfa,
2185 &skip_copy, eth_type, true, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002186 if (err)
2187 return err;
2188 break;
2189
2190 case OVS_ACTION_ATTR_SAMPLE:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002191 err = validate_and_copy_sample(a, key, depth, sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002192 eth_type, vlan_tci, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002193 if (err)
2194 return err;
2195 skip_copy = true;
2196 break;
2197
2198 default:
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002199 OVS_NLERR(log, "Unknown Action type %d", type);
Pravin B Shelare6445712013-10-03 18:16:47 -07002200 return -EINVAL;
2201 }
2202 if (!skip_copy) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002203 err = copy_action(a, sfa, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002204 if (err)
2205 return err;
2206 }
2207 }
2208
2209 if (rem > 0)
2210 return -EINVAL;
2211
2212 return 0;
2213}
2214
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002215/* 'key' must be the masked key. */
Simon Horman25cd9ba2014-10-06 05:05:13 -07002216int ovs_nla_copy_actions(const struct nlattr *attr,
2217 const struct sw_flow_key *key,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002218 struct sw_flow_actions **sfa, bool log)
Simon Horman25cd9ba2014-10-06 05:05:13 -07002219{
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002220 int err;
2221
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002222 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002223 if (IS_ERR(*sfa))
2224 return PTR_ERR(*sfa);
2225
2226 err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002227 key->eth.tci, log);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002228 if (err)
Thomas Graf34ae9322015-07-21 10:44:03 +02002229 ovs_nla_free_flow_actions(*sfa);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002230
2231 return err;
Simon Horman25cd9ba2014-10-06 05:05:13 -07002232}
2233
Pravin B Shelare6445712013-10-03 18:16:47 -07002234static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2235{
2236 const struct nlattr *a;
2237 struct nlattr *start;
2238 int err = 0, rem;
2239
2240 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2241 if (!start)
2242 return -EMSGSIZE;
2243
2244 nla_for_each_nested(a, attr, rem) {
2245 int type = nla_type(a);
2246 struct nlattr *st_sample;
2247
2248 switch (type) {
2249 case OVS_SAMPLE_ATTR_PROBABILITY:
2250 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2251 sizeof(u32), nla_data(a)))
2252 return -EMSGSIZE;
2253 break;
2254 case OVS_SAMPLE_ATTR_ACTIONS:
2255 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2256 if (!st_sample)
2257 return -EMSGSIZE;
2258 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2259 if (err)
2260 return err;
2261 nla_nest_end(skb, st_sample);
2262 break;
2263 }
2264 }
2265
2266 nla_nest_end(skb, start);
2267 return err;
2268}
2269
2270static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2271{
2272 const struct nlattr *ovs_key = nla_data(a);
2273 int key_type = nla_type(ovs_key);
2274 struct nlattr *start;
2275 int err;
2276
2277 switch (key_type) {
Jesse Grossf0b128c2014-10-03 15:35:31 -07002278 case OVS_KEY_ATTR_TUNNEL_INFO: {
Thomas Graf34ae9322015-07-21 10:44:03 +02002279 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2280 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002281
Pravin B Shelare6445712013-10-03 18:16:47 -07002282 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2283 if (!start)
2284 return -EMSGSIZE;
2285
Thomas Graf1d8fff92015-07-21 10:43:54 +02002286 err = ipv4_tun_to_nlattr(skb, &tun_info->key,
Jesse Grossf5796682014-10-03 15:35:33 -07002287 tun_info->options_len ?
2288 tun_info->options : NULL,
2289 tun_info->options_len);
Pravin B Shelare6445712013-10-03 18:16:47 -07002290 if (err)
2291 return err;
2292 nla_nest_end(skb, start);
2293 break;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002294 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002295 default:
2296 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2297 return -EMSGSIZE;
2298 break;
2299 }
2300
2301 return 0;
2302}
2303
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002304static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2305 struct sk_buff *skb)
2306{
2307 const struct nlattr *ovs_key = nla_data(a);
Joe Stringerf4f8e732015-03-02 18:49:56 -08002308 struct nlattr *nla;
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002309 size_t key_len = nla_len(ovs_key) / 2;
2310
2311 /* Revert the conversion we did from a non-masked set action to
2312 * masked set action.
2313 */
Joe Stringerf4f8e732015-03-02 18:49:56 -08002314 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2315 if (!nla)
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002316 return -EMSGSIZE;
2317
Joe Stringerf4f8e732015-03-02 18:49:56 -08002318 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2319 return -EMSGSIZE;
2320
2321 nla_nest_end(skb, nla);
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002322 return 0;
2323}
2324
Pravin B Shelare6445712013-10-03 18:16:47 -07002325int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2326{
2327 const struct nlattr *a;
2328 int rem, err;
2329
2330 nla_for_each_attr(a, attr, len, rem) {
2331 int type = nla_type(a);
2332
2333 switch (type) {
2334 case OVS_ACTION_ATTR_SET:
2335 err = set_action_to_attr(a, skb);
2336 if (err)
2337 return err;
2338 break;
2339
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002340 case OVS_ACTION_ATTR_SET_TO_MASKED:
2341 err = masked_set_action_to_set_action_attr(a, skb);
2342 if (err)
2343 return err;
2344 break;
2345
Pravin B Shelare6445712013-10-03 18:16:47 -07002346 case OVS_ACTION_ATTR_SAMPLE:
2347 err = sample_action_to_attr(a, skb);
2348 if (err)
2349 return err;
2350 break;
2351 default:
2352 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2353 return -EMSGSIZE;
2354 break;
2355 }
2356 }
2357
2358 return 0;
2359}