blob: ae25ded82b3baa779438d3460aa1aa8d5ef964f9 [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
Jesse Gross982b5272015-09-11 18:38:28 -070060#define OVS_ATTR_VARIABLE -2
Thomas Graf81bfe3c2015-01-15 03:53:58 +010061
Pravin B Shelara85311b2014-10-19 12:03:40 -070062static void update_range(struct sw_flow_match *match,
63 size_t offset, size_t size, bool is_mask)
Pravin B Shelare6445712013-10-03 18:16:47 -070064{
Pravin B Shelara85311b2014-10-19 12:03:40 -070065 struct sw_flow_key_range *range;
Pravin B Shelare6445712013-10-03 18:16:47 -070066 size_t start = rounddown(offset, sizeof(long));
67 size_t end = roundup(offset + size, sizeof(long));
68
69 if (!is_mask)
70 range = &match->range;
Pravin B Shelara85311b2014-10-19 12:03:40 -070071 else
Pravin B Shelare6445712013-10-03 18:16:47 -070072 range = &match->mask->range;
73
Pravin B Shelare6445712013-10-03 18:16:47 -070074 if (range->start == range->end) {
75 range->start = start;
76 range->end = end;
77 return;
78 }
79
80 if (range->start > start)
81 range->start = start;
82
83 if (range->end < end)
84 range->end = end;
85}
86
87#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
88 do { \
Pravin B Shelara85311b2014-10-19 12:03:40 -070089 update_range(match, offsetof(struct sw_flow_key, field), \
90 sizeof((match)->key->field), is_mask); \
91 if (is_mask) \
92 (match)->mask->key.field = value; \
93 else \
Pravin B Shelare6445712013-10-03 18:16:47 -070094 (match)->key->field = value; \
Pravin B Shelare6445712013-10-03 18:16:47 -070095 } while (0)
96
Jesse Grossf5796682014-10-03 15:35:33 -070097#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
98 do { \
Pravin B Shelara85311b2014-10-19 12:03:40 -070099 update_range(match, offset, len, is_mask); \
Jesse Grossf5796682014-10-03 15:35:33 -0700100 if (is_mask) \
101 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
Pravin B Shelara85311b2014-10-19 12:03:40 -0700102 len); \
Jesse Grossf5796682014-10-03 15:35:33 -0700103 else \
104 memcpy((u8 *)(match)->key + offset, value_p, len); \
Pravin B Shelare6445712013-10-03 18:16:47 -0700105 } while (0)
106
Jesse Grossf5796682014-10-03 15:35:33 -0700107#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
108 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
109 value_p, len, is_mask)
110
Pravin B Shelara85311b2014-10-19 12:03:40 -0700111#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
112 do { \
113 update_range(match, offsetof(struct sw_flow_key, field), \
114 sizeof((match)->key->field), is_mask); \
115 if (is_mask) \
116 memset((u8 *)&(match)->mask->key.field, value, \
117 sizeof((match)->mask->key.field)); \
118 else \
Pravin B Shelarf47de062014-10-16 21:55:45 -0700119 memset((u8 *)&(match)->key->field, value, \
120 sizeof((match)->key->field)); \
Pravin B Shelarf47de062014-10-16 21:55:45 -0700121 } while (0)
Pravin B Shelare6445712013-10-03 18:16:47 -0700122
123static bool match_validate(const struct sw_flow_match *match,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800124 u64 key_attrs, u64 mask_attrs, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700125{
126 u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
127 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
128
129 /* The following mask attributes allowed only if they
130 * pass the validation tests. */
131 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
132 | (1 << OVS_KEY_ATTR_IPV6)
133 | (1 << OVS_KEY_ATTR_TCP)
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700134 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
Pravin B Shelare6445712013-10-03 18:16:47 -0700135 | (1 << OVS_KEY_ATTR_UDP)
136 | (1 << OVS_KEY_ATTR_SCTP)
137 | (1 << OVS_KEY_ATTR_ICMP)
138 | (1 << OVS_KEY_ATTR_ICMPV6)
139 | (1 << OVS_KEY_ATTR_ARP)
Simon Horman25cd9ba2014-10-06 05:05:13 -0700140 | (1 << OVS_KEY_ATTR_ND)
141 | (1 << OVS_KEY_ATTR_MPLS));
Pravin B Shelare6445712013-10-03 18:16:47 -0700142
143 /* Always allowed mask fields. */
144 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
145 | (1 << OVS_KEY_ATTR_IN_PORT)
146 | (1 << OVS_KEY_ATTR_ETHERTYPE));
147
148 /* Check key attributes. */
149 if (match->key->eth.type == htons(ETH_P_ARP)
150 || match->key->eth.type == htons(ETH_P_RARP)) {
151 key_expected |= 1 << OVS_KEY_ATTR_ARP;
Pravin B Shelarf2a015172014-11-30 23:04:17 -0800152 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
Pravin B Shelare6445712013-10-03 18:16:47 -0700153 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
154 }
155
Simon Horman25cd9ba2014-10-06 05:05:13 -0700156 if (eth_p_mpls(match->key->eth.type)) {
157 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
158 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
159 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
160 }
161
Pravin B Shelare6445712013-10-03 18:16:47 -0700162 if (match->key->eth.type == htons(ETH_P_IP)) {
163 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
164 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
165 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
166
167 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
168 if (match->key->ip.proto == IPPROTO_UDP) {
169 key_expected |= 1 << OVS_KEY_ATTR_UDP;
170 if (match->mask && (match->mask->key.ip.proto == 0xff))
171 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
172 }
173
174 if (match->key->ip.proto == IPPROTO_SCTP) {
175 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
176 if (match->mask && (match->mask->key.ip.proto == 0xff))
177 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
178 }
179
180 if (match->key->ip.proto == IPPROTO_TCP) {
181 key_expected |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700182 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
183 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700184 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700185 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
186 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700187 }
188
189 if (match->key->ip.proto == IPPROTO_ICMP) {
190 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
191 if (match->mask && (match->mask->key.ip.proto == 0xff))
192 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
193 }
194 }
195 }
196
197 if (match->key->eth.type == htons(ETH_P_IPV6)) {
198 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
199 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
200 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
201
202 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
203 if (match->key->ip.proto == IPPROTO_UDP) {
204 key_expected |= 1 << OVS_KEY_ATTR_UDP;
205 if (match->mask && (match->mask->key.ip.proto == 0xff))
206 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
207 }
208
209 if (match->key->ip.proto == IPPROTO_SCTP) {
210 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
211 if (match->mask && (match->mask->key.ip.proto == 0xff))
212 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
213 }
214
215 if (match->key->ip.proto == IPPROTO_TCP) {
216 key_expected |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700217 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
218 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -0700220 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
221 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700222 }
223
224 if (match->key->ip.proto == IPPROTO_ICMPV6) {
225 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
226 if (match->mask && (match->mask->key.ip.proto == 0xff))
227 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
228
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700229 if (match->key->tp.src ==
Pravin B Shelare6445712013-10-03 18:16:47 -0700230 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
Jarno Rajahalme1139e242014-05-05 09:54:49 -0700231 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
Pravin B Shelare6445712013-10-03 18:16:47 -0700232 key_expected |= 1 << OVS_KEY_ATTR_ND;
Pravin B Shelarf2a015172014-11-30 23:04:17 -0800233 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
Pravin B Shelare6445712013-10-03 18:16:47 -0700234 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
235 }
236 }
237 }
238 }
239
240 if ((key_attrs & key_expected) != key_expected) {
241 /* Key attributes check failed. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800242 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
243 (unsigned long long)key_attrs,
244 (unsigned long long)key_expected);
Pravin B Shelare6445712013-10-03 18:16:47 -0700245 return false;
246 }
247
248 if ((mask_attrs & mask_allowed) != mask_attrs) {
249 /* Mask attributes check failed. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800250 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
251 (unsigned long long)mask_attrs,
252 (unsigned long long)mask_allowed);
Pravin B Shelare6445712013-10-03 18:16:47 -0700253 return false;
254 }
255
256 return true;
257}
258
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800259size_t ovs_tun_key_attr_size(void)
260{
261 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
262 * updating this function.
263 */
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200264 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
Jiri Benc6b26ba32015-10-05 13:09:47 +0200265 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
266 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800267 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
268 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
269 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
270 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
271 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
272 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
Thomas Graf1dd144c2015-01-15 03:53:59 +0100273 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
274 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
275 */
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800276 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
277 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
278}
279
Joe Stringer41af73e2014-10-18 16:14:14 -0700280size_t ovs_key_attr_size(void)
281{
282 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
283 * updating this function.
284 */
Joe Stringerc2ac6672015-08-26 11:31:52 -0700285 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26);
Joe Stringer41af73e2014-10-18 16:14:14 -0700286
287 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
288 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800289 + ovs_tun_key_attr_size()
Joe Stringer41af73e2014-10-18 16:14:14 -0700290 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
291 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
292 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
293 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
Joe Stringerfbccce52015-10-06 11:00:00 -0700294 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
Joe Stringer7f8a4362015-08-26 11:31:48 -0700295 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
Joe Stringer182e3042015-08-26 11:31:49 -0700296 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
Joe Stringer33db4122015-10-01 15:00:37 -0700297 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
Joe Stringer41af73e2014-10-18 16:14:14 -0700298 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
299 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
300 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
301 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
302 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
303 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
304 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
305 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
306}
307
Jesse Gross982b5272015-09-11 18:38:28 -0700308static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
309 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
310};
311
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100312static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
313 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
314 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
315 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
316 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
317 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
318 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
319 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
320 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
321 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
322 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
Jesse Gross982b5272015-09-11 18:38:28 -0700323 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
324 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
325 .next = ovs_vxlan_ext_key_lens },
Jiri Benc6b26ba32015-10-05 13:09:47 +0200326 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
327 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100328};
329
Pravin B Shelare6445712013-10-03 18:16:47 -0700330/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100331static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
332 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
333 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
334 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
335 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
336 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
337 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
338 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
339 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
340 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
341 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
342 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
343 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
344 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
345 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
346 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
347 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
348 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
349 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
350 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
351 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
352 .next = ovs_tunnel_key_lens, },
353 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
Joe Stringerfbccce52015-10-06 11:00:00 -0700354 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
Joe Stringer7f8a4362015-08-26 11:31:48 -0700355 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
Joe Stringer182e3042015-08-26 11:31:49 -0700356 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
Joe Stringer33db4122015-10-01 15:00:37 -0700357 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
Pravin B Shelare6445712013-10-03 18:16:47 -0700358};
359
Jesse Gross982b5272015-09-11 18:38:28 -0700360static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
361{
362 return expected_len == attr_len ||
363 expected_len == OVS_ATTR_NESTED ||
364 expected_len == OVS_ATTR_VARIABLE;
365}
366
Pravin B Shelare6445712013-10-03 18:16:47 -0700367static bool is_all_zero(const u8 *fp, size_t size)
368{
369 int i;
370
371 if (!fp)
372 return false;
373
374 for (i = 0; i < size; i++)
375 if (fp[i])
376 return false;
377
378 return true;
379}
380
381static int __parse_flow_nlattrs(const struct nlattr *attr,
382 const struct nlattr *a[],
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800383 u64 *attrsp, bool log, bool nz)
Pravin B Shelare6445712013-10-03 18:16:47 -0700384{
385 const struct nlattr *nla;
386 u64 attrs;
387 int rem;
388
389 attrs = *attrsp;
390 nla_for_each_nested(nla, attr, rem) {
391 u16 type = nla_type(nla);
392 int expected_len;
393
394 if (type > OVS_KEY_ATTR_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800395 OVS_NLERR(log, "Key type %d is out of range max %d",
Pravin B Shelare6445712013-10-03 18:16:47 -0700396 type, OVS_KEY_ATTR_MAX);
397 return -EINVAL;
398 }
399
400 if (attrs & (1 << type)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800401 OVS_NLERR(log, "Duplicate key (type %d).", type);
Pravin B Shelare6445712013-10-03 18:16:47 -0700402 return -EINVAL;
403 }
404
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100405 expected_len = ovs_key_lens[type].len;
Jesse Gross982b5272015-09-11 18:38:28 -0700406 if (!check_attr_len(nla_len(nla), expected_len)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800407 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
408 type, nla_len(nla), expected_len);
Pravin B Shelare6445712013-10-03 18:16:47 -0700409 return -EINVAL;
410 }
411
412 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
413 attrs |= 1 << type;
414 a[type] = nla;
415 }
416 }
417 if (rem) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800418 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
Pravin B Shelare6445712013-10-03 18:16:47 -0700419 return -EINVAL;
420 }
421
422 *attrsp = attrs;
423 return 0;
424}
425
426static int parse_flow_mask_nlattrs(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800427 const struct nlattr *a[], u64 *attrsp,
428 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700429{
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800430 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
Pravin B Shelare6445712013-10-03 18:16:47 -0700431}
432
433static int parse_flow_nlattrs(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800434 const struct nlattr *a[], u64 *attrsp,
435 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700436{
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800437 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
438}
439
440static int genev_tun_opt_from_nlattr(const struct nlattr *a,
441 struct sw_flow_match *match, bool is_mask,
442 bool log)
443{
444 unsigned long opt_key_offset;
445
446 if (nla_len(a) > sizeof(match->key->tun_opts)) {
447 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
448 nla_len(a), sizeof(match->key->tun_opts));
449 return -EINVAL;
450 }
451
452 if (nla_len(a) % 4 != 0) {
453 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
454 nla_len(a));
455 return -EINVAL;
456 }
457
458 /* We need to record the length of the options passed
459 * down, otherwise packets with the same format but
460 * additional options will be silently matched.
461 */
462 if (!is_mask) {
463 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
464 false);
465 } else {
466 /* This is somewhat unusual because it looks at
467 * both the key and mask while parsing the
468 * attributes (and by extension assumes the key
469 * is parsed first). Normally, we would verify
470 * that each is the correct length and that the
471 * attributes line up in the validate function.
472 * However, that is difficult because this is
473 * variable length and we won't have the
474 * information later.
475 */
476 if (match->key->tun_opts_len != nla_len(a)) {
477 OVS_NLERR(log, "Geneve option len %d != mask len %d",
478 match->key->tun_opts_len, nla_len(a));
479 return -EINVAL;
480 }
481
482 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
483 }
484
Thomas Grafd91641d2015-01-15 03:53:57 +0100485 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800486 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
487 nla_len(a), is_mask);
488 return 0;
Pravin B Shelare6445712013-10-03 18:16:47 -0700489}
490
Jesse Gross982b5272015-09-11 18:38:28 -0700491static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
Thomas Graf1dd144c2015-01-15 03:53:59 +0100492 struct sw_flow_match *match, bool is_mask,
493 bool log)
494{
Jesse Gross982b5272015-09-11 18:38:28 -0700495 struct nlattr *a;
496 int rem;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100497 unsigned long opt_key_offset;
Thomas Graf614732e2015-07-21 10:44:06 +0200498 struct vxlan_metadata opts;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100499
500 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
501
Thomas Graf1dd144c2015-01-15 03:53:59 +0100502 memset(&opts, 0, sizeof(opts));
Jesse Gross982b5272015-09-11 18:38:28 -0700503 nla_for_each_nested(a, attr, rem) {
504 int type = nla_type(a);
Thomas Graf1dd144c2015-01-15 03:53:59 +0100505
Jesse Gross982b5272015-09-11 18:38:28 -0700506 if (type > OVS_VXLAN_EXT_MAX) {
507 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
508 type, OVS_VXLAN_EXT_MAX);
509 return -EINVAL;
510 }
511
512 if (!check_attr_len(nla_len(a),
513 ovs_vxlan_ext_key_lens[type].len)) {
514 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
515 type, nla_len(a),
516 ovs_vxlan_ext_key_lens[type].len);
517 return -EINVAL;
518 }
519
520 switch (type) {
521 case OVS_VXLAN_EXT_GBP:
522 opts.gbp = nla_get_u32(a);
523 break;
524 default:
525 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
526 type);
527 return -EINVAL;
528 }
529 }
530 if (rem) {
531 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
532 rem);
533 return -EINVAL;
534 }
Thomas Graf1dd144c2015-01-15 03:53:59 +0100535
536 if (!is_mask)
537 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
538 else
539 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
540
541 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
542 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
543 is_mask);
544 return 0;
545}
546
Jiri Benc6b26ba32015-10-05 13:09:47 +0200547static int ip_tun_from_nlattr(const struct nlattr *attr,
548 struct sw_flow_match *match, bool is_mask,
549 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700550{
Pravin B Shelar99e28f12015-10-20 20:47:46 -0700551 bool ttl = false, ipv4 = false, ipv6 = false;
552 __be16 tun_flags = 0;
553 int opts_type = 0;
Pravin B Shelare6445712013-10-03 18:16:47 -0700554 struct nlattr *a;
555 int rem;
Pravin B Shelare6445712013-10-03 18:16:47 -0700556
557 nla_for_each_nested(a, attr, rem) {
558 int type = nla_type(a);
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800559 int err;
560
Pravin B Shelare6445712013-10-03 18:16:47 -0700561 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800562 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
563 type, OVS_TUNNEL_KEY_ATTR_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -0700564 return -EINVAL;
565 }
566
Jesse Gross982b5272015-09-11 18:38:28 -0700567 if (!check_attr_len(nla_len(a),
568 ovs_tunnel_key_lens[type].len)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800569 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
Thomas Graf81bfe3c2015-01-15 03:53:58 +0100570 type, nla_len(a), ovs_tunnel_key_lens[type].len);
Pravin B Shelare6445712013-10-03 18:16:47 -0700571 return -EINVAL;
572 }
573
574 switch (type) {
575 case OVS_TUNNEL_KEY_ATTR_ID:
576 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
577 nla_get_be64(a), is_mask);
578 tun_flags |= TUNNEL_KEY;
579 break;
580 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
Jiri Bencc1ea5d62015-08-20 13:56:23 +0200581 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
Jiri Benc67b61f62015-03-29 16:59:26 +0200582 nla_get_in_addr(a), is_mask);
Jiri Benc6b26ba32015-10-05 13:09:47 +0200583 ipv4 = true;
Pravin B Shelare6445712013-10-03 18:16:47 -0700584 break;
585 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
Jiri Bencc1ea5d62015-08-20 13:56:23 +0200586 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
Jiri Benc67b61f62015-03-29 16:59:26 +0200587 nla_get_in_addr(a), is_mask);
Jiri Benc6b26ba32015-10-05 13:09:47 +0200588 ipv4 = true;
589 break;
590 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
591 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
592 nla_get_in6_addr(a), is_mask);
593 ipv6 = true;
594 break;
595 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
596 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
597 nla_get_in6_addr(a), is_mask);
598 ipv6 = true;
Pravin B Shelare6445712013-10-03 18:16:47 -0700599 break;
600 case OVS_TUNNEL_KEY_ATTR_TOS:
Jiri Benc7c383fb2015-08-20 13:56:24 +0200601 SW_FLOW_KEY_PUT(match, tun_key.tos,
Pravin B Shelare6445712013-10-03 18:16:47 -0700602 nla_get_u8(a), is_mask);
603 break;
604 case OVS_TUNNEL_KEY_ATTR_TTL:
Jiri Benc7c383fb2015-08-20 13:56:24 +0200605 SW_FLOW_KEY_PUT(match, tun_key.ttl,
Pravin B Shelare6445712013-10-03 18:16:47 -0700606 nla_get_u8(a), is_mask);
607 ttl = true;
608 break;
609 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
610 tun_flags |= TUNNEL_DONT_FRAGMENT;
611 break;
612 case OVS_TUNNEL_KEY_ATTR_CSUM:
613 tun_flags |= TUNNEL_CSUM;
614 break;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800615 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
616 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
617 nla_get_be16(a), is_mask);
618 break;
619 case OVS_TUNNEL_KEY_ATTR_TP_DST:
620 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
621 nla_get_be16(a), is_mask);
622 break;
Jesse Gross67fa0342014-10-03 15:35:30 -0700623 case OVS_TUNNEL_KEY_ATTR_OAM:
624 tun_flags |= TUNNEL_OAM;
625 break;
Jesse Grossf5796682014-10-03 15:35:33 -0700626 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
Thomas Graf1dd144c2015-01-15 03:53:59 +0100627 if (opts_type) {
628 OVS_NLERR(log, "Multiple metadata blocks provided");
629 return -EINVAL;
630 }
631
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800632 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
633 if (err)
634 return err;
635
Thomas Graf1dd144c2015-01-15 03:53:59 +0100636 tun_flags |= TUNNEL_GENEVE_OPT;
637 opts_type = type;
638 break;
639 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
640 if (opts_type) {
641 OVS_NLERR(log, "Multiple metadata blocks provided");
642 return -EINVAL;
643 }
644
645 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
646 if (err)
647 return err;
648
649 tun_flags |= TUNNEL_VXLAN_OPT;
650 opts_type = type;
Jesse Grossf5796682014-10-03 15:35:33 -0700651 break;
Pravin B Shelare6445712013-10-03 18:16:47 -0700652 default:
Jiri Benc6b26ba32015-10-05 13:09:47 +0200653 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
Jesse Grossf5796682014-10-03 15:35:33 -0700654 type);
Pravin B Shelare6445712013-10-03 18:16:47 -0700655 return -EINVAL;
656 }
657 }
658
659 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
Jiri Benc00a93ba2015-10-05 13:09:46 +0200660 if (is_mask)
661 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
662 else
Jiri Benc6b26ba32015-10-05 13:09:47 +0200663 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
664 false);
Pravin B Shelare6445712013-10-03 18:16:47 -0700665
666 if (rem > 0) {
Jiri Benc6b26ba32015-10-05 13:09:47 +0200667 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800668 rem);
Pravin B Shelare6445712013-10-03 18:16:47 -0700669 return -EINVAL;
670 }
671
Jiri Benc6b26ba32015-10-05 13:09:47 +0200672 if (ipv4 && ipv6) {
673 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
674 return -EINVAL;
675 }
676
Pravin B Shelare6445712013-10-03 18:16:47 -0700677 if (!is_mask) {
Jiri Benc6b26ba32015-10-05 13:09:47 +0200678 if (!ipv4 && !ipv6) {
679 OVS_NLERR(log, "IP tunnel dst address not specified");
680 return -EINVAL;
681 }
682 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -0800683 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
Pravin B Shelare6445712013-10-03 18:16:47 -0700684 return -EINVAL;
685 }
Jiri Benc6b26ba32015-10-05 13:09:47 +0200686 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
687 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
688 return -EINVAL;
689 }
Pravin B Shelare6445712013-10-03 18:16:47 -0700690
691 if (!ttl) {
Jiri Benc6b26ba32015-10-05 13:09:47 +0200692 OVS_NLERR(log, "IP tunnel TTL not specified.");
Pravin B Shelare6445712013-10-03 18:16:47 -0700693 return -EINVAL;
694 }
695 }
696
Thomas Graf1dd144c2015-01-15 03:53:59 +0100697 return opts_type;
698}
699
700static int vxlan_opt_to_nlattr(struct sk_buff *skb,
701 const void *tun_opts, int swkey_tun_opts_len)
702{
Thomas Graf614732e2015-07-21 10:44:06 +0200703 const struct vxlan_metadata *opts = tun_opts;
Thomas Graf1dd144c2015-01-15 03:53:59 +0100704 struct nlattr *nla;
705
706 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
707 if (!nla)
708 return -EMSGSIZE;
709
710 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
711 return -EMSGSIZE;
712
713 nla_nest_end(skb, nla);
Pravin B Shelare6445712013-10-03 18:16:47 -0700714 return 0;
715}
716
Jiri Benc6b26ba32015-10-05 13:09:47 +0200717static int __ip_tun_to_nlattr(struct sk_buff *skb,
718 const struct ip_tunnel_key *output,
719 const void *tun_opts, int swkey_tun_opts_len,
720 unsigned short tun_proto)
Pravin B Shelare6445712013-10-03 18:16:47 -0700721{
Pravin B Shelare6445712013-10-03 18:16:47 -0700722 if (output->tun_flags & TUNNEL_KEY &&
Nicolas Dichtelb46f6de2016-04-22 17:31:18 +0200723 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
724 OVS_TUNNEL_KEY_ATTR_PAD))
Pravin B Shelare6445712013-10-03 18:16:47 -0700725 return -EMSGSIZE;
Jiri Benc6b26ba32015-10-05 13:09:47 +0200726 switch (tun_proto) {
727 case AF_INET:
728 if (output->u.ipv4.src &&
729 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
730 output->u.ipv4.src))
731 return -EMSGSIZE;
732 if (output->u.ipv4.dst &&
733 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
734 output->u.ipv4.dst))
735 return -EMSGSIZE;
736 break;
737 case AF_INET6:
738 if (!ipv6_addr_any(&output->u.ipv6.src) &&
739 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
740 &output->u.ipv6.src))
741 return -EMSGSIZE;
742 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
743 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
744 &output->u.ipv6.dst))
745 return -EMSGSIZE;
746 break;
747 }
Jiri Benc7c383fb2015-08-20 13:56:24 +0200748 if (output->tos &&
749 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
Pravin B Shelare6445712013-10-03 18:16:47 -0700750 return -EMSGSIZE;
Jiri Benc7c383fb2015-08-20 13:56:24 +0200751 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
Pravin B Shelare6445712013-10-03 18:16:47 -0700752 return -EMSGSIZE;
753 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
Jesse Gross67fa0342014-10-03 15:35:30 -0700754 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
Pravin B Shelare6445712013-10-03 18:16:47 -0700755 return -EMSGSIZE;
756 if ((output->tun_flags & TUNNEL_CSUM) &&
Jesse Gross67fa0342014-10-03 15:35:30 -0700757 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
758 return -EMSGSIZE;
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800759 if (output->tp_src &&
760 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
761 return -EMSGSIZE;
762 if (output->tp_dst &&
763 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
764 return -EMSGSIZE;
Jesse Gross67fa0342014-10-03 15:35:30 -0700765 if ((output->tun_flags & TUNNEL_OAM) &&
766 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
Pravin B Shelare6445712013-10-03 18:16:47 -0700767 return -EMSGSIZE;
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700768 if (swkey_tun_opts_len) {
Thomas Graf1dd144c2015-01-15 03:53:59 +0100769 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
770 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
771 swkey_tun_opts_len, tun_opts))
772 return -EMSGSIZE;
773 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
774 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
775 return -EMSGSIZE;
776 }
Jesse Grossf5796682014-10-03 15:35:33 -0700777
778 return 0;
779}
780
Jiri Benc6b26ba32015-10-05 13:09:47 +0200781static int ip_tun_to_nlattr(struct sk_buff *skb,
782 const struct ip_tunnel_key *output,
783 const void *tun_opts, int swkey_tun_opts_len,
784 unsigned short tun_proto)
Jesse Grossf5796682014-10-03 15:35:33 -0700785{
786 struct nlattr *nla;
787 int err;
788
789 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
790 if (!nla)
791 return -EMSGSIZE;
792
Jiri Benc6b26ba32015-10-05 13:09:47 +0200793 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
794 tun_proto);
Jesse Grossf5796682014-10-03 15:35:33 -0700795 if (err)
796 return err;
Pravin B Shelare6445712013-10-03 18:16:47 -0700797
798 nla_nest_end(skb, nla);
799 return 0;
800}
801
Pravin B Shelarfc4099f2015-10-22 18:17:16 -0700802int ovs_nla_put_tunnel_info(struct sk_buff *skb,
803 struct ip_tunnel_info *tun_info)
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800804{
David S. Millerba3e2082015-10-24 06:54:12 -0700805 return __ip_tun_to_nlattr(skb, &tun_info->key,
806 ip_tunnel_info_opts(tun_info),
807 tun_info->options_len,
808 ip_tunnel_info_af(tun_info));
Wenyu Zhang8f0aad62014-11-06 06:51:24 -0800809}
810
Eric Garver018c1dd2016-09-07 12:56:59 -0400811static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
812 const struct nlattr *a[],
813 bool is_mask, bool inner)
814{
815 __be16 tci = 0;
816 __be16 tpid = 0;
817
818 if (a[OVS_KEY_ATTR_VLAN])
819 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
820
821 if (a[OVS_KEY_ATTR_ETHERTYPE])
822 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
823
824 if (likely(!inner)) {
825 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
826 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
827 } else {
828 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
829 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
830 }
831 return 0;
832}
833
834static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
835 u64 key_attrs, bool inner,
836 const struct nlattr **a, bool log)
837{
838 __be16 tci = 0;
839
840 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
841 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
842 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
843 /* Not a VLAN. */
844 return 0;
845 }
846
847 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
848 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
849 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
850 return -EINVAL;
851 }
852
853 if (a[OVS_KEY_ATTR_VLAN])
854 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
855
856 if (!(tci & htons(VLAN_TAG_PRESENT))) {
857 if (tci) {
858 OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
859 (inner) ? "C-VLAN" : "VLAN");
860 return -EINVAL;
861 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
862 /* Corner case for truncated VLAN header. */
863 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
864 (inner) ? "C-VLAN" : "VLAN");
865 return -EINVAL;
866 }
867 }
868
869 return 1;
870}
871
872static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
873 u64 key_attrs, bool inner,
874 const struct nlattr **a, bool log)
875{
876 __be16 tci = 0;
877 __be16 tpid = 0;
878 bool encap_valid = !!(match->key->eth.vlan.tci &
879 htons(VLAN_TAG_PRESENT));
880 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
881 htons(VLAN_TAG_PRESENT));
882
883 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
884 /* Not a VLAN. */
885 return 0;
886 }
887
888 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
889 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
890 (inner) ? "C-VLAN" : "VLAN");
891 return -EINVAL;
892 }
893
894 if (a[OVS_KEY_ATTR_VLAN])
895 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
896
897 if (a[OVS_KEY_ATTR_ETHERTYPE])
898 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
899
900 if (tpid != htons(0xffff)) {
901 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
902 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
903 return -EINVAL;
904 }
905 if (!(tci & htons(VLAN_TAG_PRESENT))) {
906 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
907 (inner) ? "C-VLAN" : "VLAN");
908 return -EINVAL;
909 }
910
911 return 1;
912}
913
914static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
915 u64 *key_attrs, bool inner,
916 const struct nlattr **a, bool is_mask,
917 bool log)
918{
919 int err;
920 const struct nlattr *encap;
921
922 if (!is_mask)
923 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
924 a, log);
925 else
926 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
927 a, log);
928 if (err <= 0)
929 return err;
930
931 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
932 if (err)
933 return err;
934
935 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
936 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
937 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
938
939 encap = a[OVS_KEY_ATTR_ENCAP];
940
941 if (!is_mask)
942 err = parse_flow_nlattrs(encap, a, key_attrs, log);
943 else
944 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
945
946 return err;
947}
948
949static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
950 u64 *key_attrs, const struct nlattr **a,
951 bool is_mask, bool log)
952{
953 int err;
954 bool encap_valid = false;
955
956 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
957 is_mask, log);
958 if (err)
959 return err;
960
961 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
962 if (encap_valid) {
963 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
964 is_mask, log);
965 if (err)
966 return err;
967 }
968
969 return 0;
970}
971
Joe Stringerc2ac6672015-08-26 11:31:52 -0700972static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
973 u64 *attrs, const struct nlattr **a,
974 bool is_mask, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -0700975{
Andy Zhou971427f32014-09-15 19:37:25 -0700976 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
977 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
978
979 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
980 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
981 }
982
983 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
984 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
985
986 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
987 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
988 }
989
Pravin B Shelare6445712013-10-03 18:16:47 -0700990 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
991 SW_FLOW_KEY_PUT(match, phy.priority,
992 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
993 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
994 }
995
996 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
997 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
998
Jesse Gross426cda52014-10-06 05:08:38 -0700999 if (is_mask) {
Pravin B Shelare6445712013-10-03 18:16:47 -07001000 in_port = 0xffffffff; /* Always exact match in_port. */
Jesse Gross426cda52014-10-06 05:08:38 -07001001 } else if (in_port >= DP_MAX_PORTS) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001002 OVS_NLERR(log, "Port %d exceeds max allowable %d",
Jesse Gross426cda52014-10-06 05:08:38 -07001003 in_port, DP_MAX_PORTS);
Pravin B Shelare6445712013-10-03 18:16:47 -07001004 return -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -07001005 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001006
1007 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1008 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1009 } else if (!is_mask) {
1010 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1011 }
1012
1013 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1014 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1015
1016 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1017 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1018 }
1019 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
Jiri Benc6b26ba32015-10-05 13:09:47 +02001020 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1021 is_mask, log) < 0)
Pravin B Shelare6445712013-10-03 18:16:47 -07001022 return -EINVAL;
1023 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1024 }
Joe Stringer7f8a4362015-08-26 11:31:48 -07001025
1026 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
Joe Stringerc2ac6672015-08-26 11:31:52 -07001027 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
Joe Stringerfbccce52015-10-06 11:00:00 -07001028 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
Joe Stringer7f8a4362015-08-26 11:31:48 -07001029
Joe Stringer9e384712015-10-19 19:18:57 -07001030 if (ct_state & ~CT_SUPPORTED_MASK) {
Joe Stringerfbccce52015-10-06 11:00:00 -07001031 OVS_NLERR(log, "ct_state flags %08x unsupported",
Joe Stringer6f225952015-10-06 10:59:59 -07001032 ct_state);
1033 return -EINVAL;
1034 }
Joe Stringer7f8a4362015-08-26 11:31:48 -07001035
1036 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
1037 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1038 }
1039 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
Joe Stringerc2ac6672015-08-26 11:31:52 -07001040 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
Joe Stringer7f8a4362015-08-26 11:31:48 -07001041 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1042
1043 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
1044 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1045 }
Joe Stringer182e3042015-08-26 11:31:49 -07001046 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
Joe Stringerc2ac6672015-08-26 11:31:52 -07001047 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
Joe Stringer182e3042015-08-26 11:31:49 -07001048 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1049
1050 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1051 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1052 }
Joe Stringer33db4122015-10-01 15:00:37 -07001053 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1054 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1055 const struct ovs_key_ct_labels *cl;
Joe Stringerc2ac6672015-08-26 11:31:52 -07001056
Joe Stringer33db4122015-10-01 15:00:37 -07001057 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1058 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
Joe Stringerc2ac6672015-08-26 11:31:52 -07001059 sizeof(*cl), is_mask);
Joe Stringer33db4122015-10-01 15:00:37 -07001060 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
Joe Stringerc2ac6672015-08-26 11:31:52 -07001061 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001062 return 0;
1063}
1064
Joe Stringerc2ac6672015-08-26 11:31:52 -07001065static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1066 u64 attrs, const struct nlattr **a,
1067 bool is_mask, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001068{
1069 int err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001070
Joe Stringerc2ac6672015-08-26 11:31:52 -07001071 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001072 if (err)
1073 return err;
1074
1075 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1076 const struct ovs_key_ethernet *eth_key;
1077
1078 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1079 SW_FLOW_KEY_MEMCPY(match, eth.src,
1080 eth_key->eth_src, ETH_ALEN, is_mask);
1081 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1082 eth_key->eth_dst, ETH_ALEN, is_mask);
1083 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1084 }
1085
1086 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
Eric Garver018c1dd2016-09-07 12:56:59 -04001087 /* VLAN attribute is always parsed before getting here since it
1088 * may occur multiple times.
1089 */
1090 OVS_NLERR(log, "VLAN attribute unexpected.");
1091 return -EINVAL;
Pravin B Shelara85311b2014-10-19 12:03:40 -07001092 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001093
1094 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1095 __be16 eth_type;
1096
1097 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1098 if (is_mask) {
1099 /* Always exact match EtherType. */
1100 eth_type = htons(0xffff);
Alexander Duyck6713fc92015-05-04 14:34:05 -07001101 } else if (!eth_proto_is_802_3(eth_type)) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001102 OVS_NLERR(log, "EtherType %x is less than min %x",
1103 ntohs(eth_type), ETH_P_802_3_MIN);
Pravin B Shelare6445712013-10-03 18:16:47 -07001104 return -EINVAL;
1105 }
1106
1107 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1108 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1109 } else if (!is_mask) {
1110 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1111 }
1112
1113 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1114 const struct ovs_key_ipv4 *ipv4_key;
1115
1116 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1117 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001118 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1119 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -07001120 return -EINVAL;
1121 }
1122 SW_FLOW_KEY_PUT(match, ip.proto,
1123 ipv4_key->ipv4_proto, is_mask);
1124 SW_FLOW_KEY_PUT(match, ip.tos,
1125 ipv4_key->ipv4_tos, is_mask);
1126 SW_FLOW_KEY_PUT(match, ip.ttl,
1127 ipv4_key->ipv4_ttl, is_mask);
1128 SW_FLOW_KEY_PUT(match, ip.frag,
1129 ipv4_key->ipv4_frag, is_mask);
1130 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1131 ipv4_key->ipv4_src, is_mask);
1132 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1133 ipv4_key->ipv4_dst, is_mask);
1134 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1135 }
1136
1137 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1138 const struct ovs_key_ipv6 *ipv6_key;
1139
1140 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1141 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001142 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1143 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
Pravin B Shelare6445712013-10-03 18:16:47 -07001144 return -EINVAL;
1145 }
Jarno Rajahalmefecaef82014-11-11 14:36:30 -08001146
Joe Stringerd3052bb2014-11-19 13:54:49 -08001147 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
David S. Miller14591432014-11-21 22:28:24 -05001148 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
Jarno Rajahalmefecaef82014-11-11 14:36:30 -08001149 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1150 return -EINVAL;
1151 }
1152
Pravin B Shelare6445712013-10-03 18:16:47 -07001153 SW_FLOW_KEY_PUT(match, ipv6.label,
1154 ipv6_key->ipv6_label, is_mask);
1155 SW_FLOW_KEY_PUT(match, ip.proto,
1156 ipv6_key->ipv6_proto, is_mask);
1157 SW_FLOW_KEY_PUT(match, ip.tos,
1158 ipv6_key->ipv6_tclass, is_mask);
1159 SW_FLOW_KEY_PUT(match, ip.ttl,
1160 ipv6_key->ipv6_hlimit, is_mask);
1161 SW_FLOW_KEY_PUT(match, ip.frag,
1162 ipv6_key->ipv6_frag, is_mask);
1163 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1164 ipv6_key->ipv6_src,
1165 sizeof(match->key->ipv6.addr.src),
1166 is_mask);
1167 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1168 ipv6_key->ipv6_dst,
1169 sizeof(match->key->ipv6.addr.dst),
1170 is_mask);
1171
1172 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1173 }
1174
1175 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1176 const struct ovs_key_arp *arp_key;
1177
1178 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1179 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001180 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
Pravin B Shelare6445712013-10-03 18:16:47 -07001181 arp_key->arp_op);
1182 return -EINVAL;
1183 }
1184
1185 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1186 arp_key->arp_sip, is_mask);
1187 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1188 arp_key->arp_tip, is_mask);
1189 SW_FLOW_KEY_PUT(match, ip.proto,
1190 ntohs(arp_key->arp_op), is_mask);
1191 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1192 arp_key->arp_sha, ETH_ALEN, is_mask);
1193 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1194 arp_key->arp_tha, ETH_ALEN, is_mask);
1195
1196 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1197 }
1198
Simon Horman25cd9ba2014-10-06 05:05:13 -07001199 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1200 const struct ovs_key_mpls *mpls_key;
1201
1202 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1203 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1204 mpls_key->mpls_lse, is_mask);
1205
1206 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1207 }
1208
Pravin B Shelare6445712013-10-03 18:16:47 -07001209 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1210 const struct ovs_key_tcp *tcp_key;
1211
1212 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001213 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1214 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -07001215 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1216 }
1217
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -07001218 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
Joe Stringer1b760fb2014-09-07 22:11:08 -07001219 SW_FLOW_KEY_PUT(match, tp.flags,
1220 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1221 is_mask);
Jarno Rajahalme5eb26b12013-10-23 01:44:59 -07001222 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1223 }
1224
Pravin B Shelare6445712013-10-03 18:16:47 -07001225 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1226 const struct ovs_key_udp *udp_key;
1227
1228 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001229 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1230 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -07001231 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1232 }
1233
1234 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1235 const struct ovs_key_sctp *sctp_key;
1236
1237 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001238 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1239 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
Pravin B Shelare6445712013-10-03 18:16:47 -07001240 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1241 }
1242
1243 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1244 const struct ovs_key_icmp *icmp_key;
1245
1246 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001247 SW_FLOW_KEY_PUT(match, tp.src,
Pravin B Shelare6445712013-10-03 18:16:47 -07001248 htons(icmp_key->icmp_type), is_mask);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001249 SW_FLOW_KEY_PUT(match, tp.dst,
Pravin B Shelare6445712013-10-03 18:16:47 -07001250 htons(icmp_key->icmp_code), is_mask);
1251 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1252 }
1253
1254 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1255 const struct ovs_key_icmpv6 *icmpv6_key;
1256
1257 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001258 SW_FLOW_KEY_PUT(match, tp.src,
Pravin B Shelare6445712013-10-03 18:16:47 -07001259 htons(icmpv6_key->icmpv6_type), is_mask);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001260 SW_FLOW_KEY_PUT(match, tp.dst,
Pravin B Shelare6445712013-10-03 18:16:47 -07001261 htons(icmpv6_key->icmpv6_code), is_mask);
1262 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1263 }
1264
1265 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1266 const struct ovs_key_nd *nd_key;
1267
1268 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1269 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1270 nd_key->nd_target,
1271 sizeof(match->key->ipv6.nd.target),
1272 is_mask);
1273 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1274 nd_key->nd_sll, ETH_ALEN, is_mask);
1275 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1276 nd_key->nd_tll, ETH_ALEN, is_mask);
1277 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1278 }
1279
Jesse Gross426cda52014-10-06 05:08:38 -07001280 if (attrs != 0) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001281 OVS_NLERR(log, "Unknown key attributes %llx",
Jesse Gross426cda52014-10-06 05:08:38 -07001282 (unsigned long long)attrs);
Pravin B Shelare6445712013-10-03 18:16:47 -07001283 return -EINVAL;
Jesse Gross426cda52014-10-06 05:08:38 -07001284 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001285
1286 return 0;
1287}
1288
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001289static void nlattr_set(struct nlattr *attr, u8 val,
1290 const struct ovs_len_tbl *tbl)
Pravin B Shelare6445712013-10-03 18:16:47 -07001291{
Pravin B Shelarf47de062014-10-16 21:55:45 -07001292 struct nlattr *nla;
1293 int rem;
Pravin B Shelare6445712013-10-03 18:16:47 -07001294
Pravin B Shelarf47de062014-10-16 21:55:45 -07001295 /* The nlattr stream should already have been validated */
1296 nla_for_each_nested(nla, attr, rem) {
Jesse Gross982b5272015-09-11 18:38:28 -07001297 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1298 if (tbl[nla_type(nla)].next)
1299 tbl = tbl[nla_type(nla)].next;
1300 nlattr_set(nla, val, tbl);
1301 } else {
Pravin B Shelarf47de062014-10-16 21:55:45 -07001302 memset(nla_data(nla), val, nla_len(nla));
Jesse Gross982b5272015-09-11 18:38:28 -07001303 }
Joe Stringer9e384712015-10-19 19:18:57 -07001304
1305 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1306 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
Pravin B Shelarf47de062014-10-16 21:55:45 -07001307 }
1308}
1309
1310static void mask_set_nlattr(struct nlattr *attr, u8 val)
1311{
Thomas Graf81bfe3c2015-01-15 03:53:58 +01001312 nlattr_set(attr, val, ovs_key_lens);
Pravin B Shelare6445712013-10-03 18:16:47 -07001313}
1314
1315/**
1316 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1317 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1318 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1319 * does not include any don't care bit.
Joe Stringerc2ac6672015-08-26 11:31:52 -07001320 * @net: Used to determine per-namespace field support.
Pravin B Shelare6445712013-10-03 18:16:47 -07001321 * @match: receives the extracted flow match information.
1322 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1323 * sequence. The fields should of the packet that triggered the creation
1324 * of this flow.
1325 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1326 * attribute specifies the mask field of the wildcarded flow.
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001327 * @log: Boolean to allow kernel error logging. Normally true, but when
1328 * probing for feature compatibility this should be passed in as false to
1329 * suppress unnecessary error logging.
Pravin B Shelare6445712013-10-03 18:16:47 -07001330 */
Joe Stringerc2ac6672015-08-26 11:31:52 -07001331int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
Pravin B Shelara85311b2014-10-19 12:03:40 -07001332 const struct nlattr *nla_key,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001333 const struct nlattr *nla_mask,
1334 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001335{
1336 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
Pravin B Shelarf47de062014-10-16 21:55:45 -07001337 struct nlattr *newmask = NULL;
Pravin B Shelare6445712013-10-03 18:16:47 -07001338 u64 key_attrs = 0;
1339 u64 mask_attrs = 0;
Pravin B Shelare6445712013-10-03 18:16:47 -07001340 int err;
1341
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001342 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001343 if (err)
1344 return err;
1345
Eric Garver018c1dd2016-09-07 12:56:59 -04001346 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1347 if (err)
1348 return err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001349
Joe Stringerc2ac6672015-08-26 11:31:52 -07001350 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001351 if (err)
1352 return err;
1353
Pravin B Shelara85311b2014-10-19 12:03:40 -07001354 if (match->mask) {
1355 if (!nla_mask) {
1356 /* Create an exact match mask. We need to set to 0xff
1357 * all the 'match->mask' fields that have been touched
1358 * in 'match->key'. We cannot simply memset
1359 * 'match->mask', because padding bytes and fields not
1360 * specified in 'match->key' should be left to 0.
1361 * Instead, we use a stream of netlink attributes,
1362 * copied from 'key' and set to 0xff.
1363 * ovs_key_from_nlattrs() will take care of filling
1364 * 'match->mask' appropriately.
1365 */
1366 newmask = kmemdup(nla_key,
1367 nla_total_size(nla_len(nla_key)),
1368 GFP_KERNEL);
1369 if (!newmask)
1370 return -ENOMEM;
Pravin B Shelarf47de062014-10-16 21:55:45 -07001371
Pravin B Shelara85311b2014-10-19 12:03:40 -07001372 mask_set_nlattr(newmask, 0xff);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001373
Pravin B Shelara85311b2014-10-19 12:03:40 -07001374 /* The userspace does not send tunnel attributes that
1375 * are 0, but we should not wildcard them nonetheless.
1376 */
Jiri Benc00a93ba2015-10-05 13:09:46 +02001377 if (match->key->tun_proto)
Pravin B Shelara85311b2014-10-19 12:03:40 -07001378 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1379 0xff, true);
Pravin B Shelarf47de062014-10-16 21:55:45 -07001380
Pravin B Shelara85311b2014-10-19 12:03:40 -07001381 nla_mask = newmask;
1382 }
Pravin B Shelarf47de062014-10-16 21:55:45 -07001383
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001384 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001385 if (err)
Pravin B Shelarf47de062014-10-16 21:55:45 -07001386 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001387
Pravin B Shelara85311b2014-10-19 12:03:40 -07001388 /* Always match on tci. */
Eric Garver018c1dd2016-09-07 12:56:59 -04001389 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1390 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
Pravin B Shelara85311b2014-10-19 12:03:40 -07001391
Eric Garver018c1dd2016-09-07 12:56:59 -04001392 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1393 if (err)
1394 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001395
Joe Stringerc2ac6672015-08-26 11:31:52 -07001396 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1397 log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001398 if (err)
Pravin B Shelarf47de062014-10-16 21:55:45 -07001399 goto free_newmask;
Pravin B Shelare6445712013-10-03 18:16:47 -07001400 }
1401
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001402 if (!match_validate(match, key_attrs, mask_attrs, log))
Pravin B Shelarf47de062014-10-16 21:55:45 -07001403 err = -EINVAL;
Pravin B Shelare6445712013-10-03 18:16:47 -07001404
Pravin B Shelarf47de062014-10-16 21:55:45 -07001405free_newmask:
1406 kfree(newmask);
1407 return err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001408}
1409
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001410static size_t get_ufid_len(const struct nlattr *attr, bool log)
1411{
1412 size_t len;
1413
1414 if (!attr)
1415 return 0;
1416
1417 len = nla_len(attr);
1418 if (len < 1 || len > MAX_UFID_LENGTH) {
1419 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1420 nla_len(attr), MAX_UFID_LENGTH);
1421 return 0;
1422 }
1423
1424 return len;
1425}
1426
1427/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1428 * or false otherwise.
1429 */
1430bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1431 bool log)
1432{
1433 sfid->ufid_len = get_ufid_len(attr, log);
1434 if (sfid->ufid_len)
1435 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1436
1437 return sfid->ufid_len;
1438}
1439
1440int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1441 const struct sw_flow_key *key, bool log)
1442{
1443 struct sw_flow_key *new_key;
1444
1445 if (ovs_nla_get_ufid(sfid, ufid, log))
1446 return 0;
1447
1448 /* If UFID was not provided, use unmasked key. */
1449 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1450 if (!new_key)
1451 return -ENOMEM;
1452 memcpy(new_key, key, sizeof(*key));
1453 sfid->unmasked_key = new_key;
1454
1455 return 0;
1456}
1457
1458u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1459{
1460 return attr ? nla_get_u32(attr) : 0;
1461}
1462
Pravin B Shelare6445712013-10-03 18:16:47 -07001463/**
1464 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001465 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
Pravin B Shelare6445712013-10-03 18:16:47 -07001466 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1467 * sequence.
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001468 * @log: Boolean to allow kernel error logging. Normally true, but when
1469 * probing for feature compatibility this should be passed in as false to
1470 * suppress unnecessary error logging.
Pravin B Shelare6445712013-10-03 18:16:47 -07001471 *
1472 * This parses a series of Netlink attributes that form a flow key, which must
1473 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1474 * get the metadata, that is, the parts of the flow key that cannot be
1475 * extracted from the packet itself.
1476 */
1477
Joe Stringerc2ac6672015-08-26 11:31:52 -07001478int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001479 struct sw_flow_key *key,
1480 bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001481{
Pravin B Shelare6445712013-10-03 18:16:47 -07001482 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001483 struct sw_flow_match match;
Pravin B Shelare6445712013-10-03 18:16:47 -07001484 u64 attrs = 0;
1485 int err;
Pravin B Shelare6445712013-10-03 18:16:47 -07001486
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001487 err = parse_flow_nlattrs(attr, a, &attrs, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001488 if (err)
1489 return -EINVAL;
1490
1491 memset(&match, 0, sizeof(match));
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001492 match.key = key;
Pravin B Shelare6445712013-10-03 18:16:47 -07001493
Joe Stringer7f8a4362015-08-26 11:31:48 -07001494 memset(&key->ct, 0, sizeof(key->ct));
Pravin B Shelar83c8df22014-09-15 19:20:31 -07001495 key->phy.in_port = DP_MAX_PORTS;
Pravin B Shelare6445712013-10-03 18:16:47 -07001496
Joe Stringerc2ac6672015-08-26 11:31:52 -07001497 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001498}
1499
Eric Garver018c1dd2016-09-07 12:56:59 -04001500static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1501 bool is_mask)
1502{
1503 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1504
1505 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1506 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1507 return -EMSGSIZE;
1508 return 0;
1509}
1510
Joe Stringer5b4237b2015-01-21 16:42:48 -08001511static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1512 const struct sw_flow_key *output, bool is_mask,
1513 struct sk_buff *skb)
Pravin B Shelare6445712013-10-03 18:16:47 -07001514{
1515 struct ovs_key_ethernet *eth_key;
Eric Garver018c1dd2016-09-07 12:56:59 -04001516 struct nlattr *nla;
1517 struct nlattr *encap = NULL;
1518 struct nlattr *in_encap = NULL;
Pravin B Shelare6445712013-10-03 18:16:47 -07001519
Andy Zhou971427f32014-09-15 19:37:25 -07001520 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1521 goto nla_put_failure;
1522
1523 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1524 goto nla_put_failure;
1525
Pravin B Shelare6445712013-10-03 18:16:47 -07001526 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1527 goto nla_put_failure;
1528
Jiri Benc00a93ba2015-10-05 13:09:46 +02001529 if ((swkey->tun_proto || is_mask)) {
Thomas Grafd91641d2015-01-15 03:53:57 +01001530 const void *opts = NULL;
Jesse Grossf5796682014-10-03 15:35:33 -07001531
1532 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
Thomas Grafd91641d2015-01-15 03:53:57 +01001533 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
Jesse Grossf5796682014-10-03 15:35:33 -07001534
Jiri Benc6b26ba32015-10-05 13:09:47 +02001535 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1536 swkey->tun_opts_len, swkey->tun_proto))
Jesse Grossf5796682014-10-03 15:35:33 -07001537 goto nla_put_failure;
1538 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001539
1540 if (swkey->phy.in_port == DP_MAX_PORTS) {
1541 if (is_mask && (output->phy.in_port == 0xffff))
1542 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1543 goto nla_put_failure;
1544 } else {
1545 u16 upper_u16;
1546 upper_u16 = !is_mask ? 0 : 0xffff;
1547
1548 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1549 (upper_u16 << 16) | output->phy.in_port))
1550 goto nla_put_failure;
1551 }
1552
1553 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1554 goto nla_put_failure;
1555
Joe Stringer7f8a4362015-08-26 11:31:48 -07001556 if (ovs_ct_put_key(output, skb))
1557 goto nla_put_failure;
1558
Pravin B Shelare6445712013-10-03 18:16:47 -07001559 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1560 if (!nla)
1561 goto nla_put_failure;
1562
1563 eth_key = nla_data(nla);
Joe Perches8c63ff02014-02-18 11:15:45 -08001564 ether_addr_copy(eth_key->eth_src, output->eth.src);
1565 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001566
Eric Garver018c1dd2016-09-07 12:56:59 -04001567 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1568 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
Pravin B Shelare6445712013-10-03 18:16:47 -07001569 goto nla_put_failure;
1570 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
Eric Garver018c1dd2016-09-07 12:56:59 -04001571 if (!swkey->eth.vlan.tci)
Pravin B Shelare6445712013-10-03 18:16:47 -07001572 goto unencap;
Eric Garver018c1dd2016-09-07 12:56:59 -04001573
1574 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1575 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1576 goto nla_put_failure;
1577 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1578 if (!swkey->eth.cvlan.tci)
1579 goto unencap;
1580 }
1581 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001582
1583 if (swkey->eth.type == htons(ETH_P_802_2)) {
1584 /*
1585 * Ethertype 802.2 is represented in the netlink with omitted
1586 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1587 * 0xffff in the mask attribute. Ethertype can also
1588 * be wildcarded.
1589 */
1590 if (is_mask && output->eth.type)
1591 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1592 output->eth.type))
1593 goto nla_put_failure;
1594 goto unencap;
1595 }
1596
1597 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1598 goto nla_put_failure;
1599
Eric Garver018c1dd2016-09-07 12:56:59 -04001600 if (eth_type_vlan(swkey->eth.type)) {
1601 /* There are 3 VLAN tags, we don't know anything about the rest
1602 * of the packet, so truncate here.
1603 */
1604 WARN_ON_ONCE(!(encap && in_encap));
1605 goto unencap;
1606 }
1607
Pravin B Shelare6445712013-10-03 18:16:47 -07001608 if (swkey->eth.type == htons(ETH_P_IP)) {
1609 struct ovs_key_ipv4 *ipv4_key;
1610
1611 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1612 if (!nla)
1613 goto nla_put_failure;
1614 ipv4_key = nla_data(nla);
1615 ipv4_key->ipv4_src = output->ipv4.addr.src;
1616 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1617 ipv4_key->ipv4_proto = output->ip.proto;
1618 ipv4_key->ipv4_tos = output->ip.tos;
1619 ipv4_key->ipv4_ttl = output->ip.ttl;
1620 ipv4_key->ipv4_frag = output->ip.frag;
1621 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1622 struct ovs_key_ipv6 *ipv6_key;
1623
1624 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1625 if (!nla)
1626 goto nla_put_failure;
1627 ipv6_key = nla_data(nla);
1628 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1629 sizeof(ipv6_key->ipv6_src));
1630 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1631 sizeof(ipv6_key->ipv6_dst));
1632 ipv6_key->ipv6_label = output->ipv6.label;
1633 ipv6_key->ipv6_proto = output->ip.proto;
1634 ipv6_key->ipv6_tclass = output->ip.tos;
1635 ipv6_key->ipv6_hlimit = output->ip.ttl;
1636 ipv6_key->ipv6_frag = output->ip.frag;
1637 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1638 swkey->eth.type == htons(ETH_P_RARP)) {
1639 struct ovs_key_arp *arp_key;
1640
1641 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1642 if (!nla)
1643 goto nla_put_failure;
1644 arp_key = nla_data(nla);
1645 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1646 arp_key->arp_sip = output->ipv4.addr.src;
1647 arp_key->arp_tip = output->ipv4.addr.dst;
1648 arp_key->arp_op = htons(output->ip.proto);
Joe Perches8c63ff02014-02-18 11:15:45 -08001649 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1650 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
Simon Horman25cd9ba2014-10-06 05:05:13 -07001651 } else if (eth_p_mpls(swkey->eth.type)) {
1652 struct ovs_key_mpls *mpls_key;
1653
1654 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1655 if (!nla)
1656 goto nla_put_failure;
1657 mpls_key = nla_data(nla);
1658 mpls_key->mpls_lse = output->mpls.top_lse;
Pravin B Shelare6445712013-10-03 18:16:47 -07001659 }
1660
1661 if ((swkey->eth.type == htons(ETH_P_IP) ||
1662 swkey->eth.type == htons(ETH_P_IPV6)) &&
1663 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1664
1665 if (swkey->ip.proto == IPPROTO_TCP) {
1666 struct ovs_key_tcp *tcp_key;
1667
1668 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1669 if (!nla)
1670 goto nla_put_failure;
1671 tcp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001672 tcp_key->tcp_src = output->tp.src;
1673 tcp_key->tcp_dst = output->tp.dst;
1674 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1675 output->tp.flags))
1676 goto nla_put_failure;
Pravin B Shelare6445712013-10-03 18:16:47 -07001677 } else if (swkey->ip.proto == IPPROTO_UDP) {
1678 struct ovs_key_udp *udp_key;
1679
1680 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1681 if (!nla)
1682 goto nla_put_failure;
1683 udp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001684 udp_key->udp_src = output->tp.src;
1685 udp_key->udp_dst = output->tp.dst;
Pravin B Shelare6445712013-10-03 18:16:47 -07001686 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1687 struct ovs_key_sctp *sctp_key;
1688
1689 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1690 if (!nla)
1691 goto nla_put_failure;
1692 sctp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001693 sctp_key->sctp_src = output->tp.src;
1694 sctp_key->sctp_dst = output->tp.dst;
Pravin B Shelare6445712013-10-03 18:16:47 -07001695 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1696 swkey->ip.proto == IPPROTO_ICMP) {
1697 struct ovs_key_icmp *icmp_key;
1698
1699 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1700 if (!nla)
1701 goto nla_put_failure;
1702 icmp_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001703 icmp_key->icmp_type = ntohs(output->tp.src);
1704 icmp_key->icmp_code = ntohs(output->tp.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001705 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1706 swkey->ip.proto == IPPROTO_ICMPV6) {
1707 struct ovs_key_icmpv6 *icmpv6_key;
1708
1709 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1710 sizeof(*icmpv6_key));
1711 if (!nla)
1712 goto nla_put_failure;
1713 icmpv6_key = nla_data(nla);
Jarno Rajahalme1139e242014-05-05 09:54:49 -07001714 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1715 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
Pravin B Shelare6445712013-10-03 18:16:47 -07001716
1717 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1718 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1719 struct ovs_key_nd *nd_key;
1720
1721 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1722 if (!nla)
1723 goto nla_put_failure;
1724 nd_key = nla_data(nla);
1725 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1726 sizeof(nd_key->nd_target));
Joe Perches8c63ff02014-02-18 11:15:45 -08001727 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1728 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
Pravin B Shelare6445712013-10-03 18:16:47 -07001729 }
1730 }
1731 }
1732
1733unencap:
Eric Garver018c1dd2016-09-07 12:56:59 -04001734 if (in_encap)
1735 nla_nest_end(skb, in_encap);
Pravin B Shelare6445712013-10-03 18:16:47 -07001736 if (encap)
1737 nla_nest_end(skb, encap);
1738
1739 return 0;
1740
1741nla_put_failure:
1742 return -EMSGSIZE;
1743}
1744
Joe Stringer5b4237b2015-01-21 16:42:48 -08001745int ovs_nla_put_key(const struct sw_flow_key *swkey,
1746 const struct sw_flow_key *output, int attr, bool is_mask,
1747 struct sk_buff *skb)
1748{
1749 int err;
1750 struct nlattr *nla;
1751
1752 nla = nla_nest_start(skb, attr);
1753 if (!nla)
1754 return -EMSGSIZE;
1755 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1756 if (err)
1757 return err;
1758 nla_nest_end(skb, nla);
1759
1760 return 0;
1761}
1762
1763/* Called with ovs_mutex or RCU read lock. */
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001764int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
Joe Stringer5b4237b2015-01-21 16:42:48 -08001765{
Joe Stringer74ed7ab2015-01-21 16:42:52 -08001766 if (ovs_identifier_is_ufid(&flow->id))
1767 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1768 flow->id.ufid);
1769
1770 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1771 OVS_FLOW_ATTR_KEY, false, skb);
1772}
1773
1774/* Called with ovs_mutex or RCU read lock. */
1775int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1776{
Pravin B Shelar26ad0b82015-02-12 09:58:48 -08001777 return ovs_nla_put_key(&flow->key, &flow->key,
Joe Stringer5b4237b2015-01-21 16:42:48 -08001778 OVS_FLOW_ATTR_KEY, false, skb);
1779}
1780
1781/* Called with ovs_mutex or RCU read lock. */
1782int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1783{
1784 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1785 OVS_FLOW_ATTR_MASK, true, skb);
1786}
1787
Pravin B Shelare6445712013-10-03 18:16:47 -07001788#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1789
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001790static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001791{
1792 struct sw_flow_actions *sfa;
1793
Jesse Gross426cda52014-10-06 05:08:38 -07001794 if (size > MAX_ACTIONS_BUFSIZE) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001795 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
Pravin B Shelare6445712013-10-03 18:16:47 -07001796 return ERR_PTR(-EINVAL);
Jesse Gross426cda52014-10-06 05:08:38 -07001797 }
Pravin B Shelare6445712013-10-03 18:16:47 -07001798
1799 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1800 if (!sfa)
1801 return ERR_PTR(-ENOMEM);
1802
1803 sfa->actions_len = 0;
1804 return sfa;
1805}
1806
Thomas Graf34ae9322015-07-21 10:44:03 +02001807static void ovs_nla_free_set_action(const struct nlattr *a)
1808{
1809 const struct nlattr *ovs_key = nla_data(a);
1810 struct ovs_tunnel_info *ovs_tun;
1811
1812 switch (nla_type(ovs_key)) {
1813 case OVS_KEY_ATTR_TUNNEL_INFO:
1814 ovs_tun = nla_data(ovs_key);
1815 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1816 break;
1817 }
1818}
1819
Pravin B Shelare6445712013-10-03 18:16:47 -07001820void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1821{
Thomas Graf34ae9322015-07-21 10:44:03 +02001822 const struct nlattr *a;
1823 int rem;
1824
1825 if (!sf_acts)
1826 return;
1827
1828 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1829 switch (nla_type(a)) {
1830 case OVS_ACTION_ATTR_SET:
1831 ovs_nla_free_set_action(a);
1832 break;
Joe Stringer7f8a4362015-08-26 11:31:48 -07001833 case OVS_ACTION_ATTR_CT:
1834 ovs_ct_free_action(a);
1835 break;
Thomas Graf34ae9322015-07-21 10:44:03 +02001836 }
1837 }
1838
1839 kfree(sf_acts);
1840}
1841
1842static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1843{
1844 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1845}
1846
1847/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1848 * The caller must hold rcu_read_lock for this to be sensible. */
1849void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1850{
1851 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
Pravin B Shelare6445712013-10-03 18:16:47 -07001852}
1853
1854static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001855 int attr_len, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001856{
1857
1858 struct sw_flow_actions *acts;
1859 int new_acts_size;
1860 int req_size = NLA_ALIGN(attr_len);
1861 int next_offset = offsetof(struct sw_flow_actions, actions) +
1862 (*sfa)->actions_len;
1863
1864 if (req_size <= (ksize(*sfa) - next_offset))
1865 goto out;
1866
1867 new_acts_size = ksize(*sfa) * 2;
1868
1869 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1870 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1871 return ERR_PTR(-EMSGSIZE);
1872 new_acts_size = MAX_ACTIONS_BUFSIZE;
1873 }
1874
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001875 acts = nla_alloc_flow_actions(new_acts_size, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001876 if (IS_ERR(acts))
1877 return (void *)acts;
1878
1879 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1880 acts->actions_len = (*sfa)->actions_len;
Joe Stringer8e2fed12015-08-26 11:31:44 -07001881 acts->orig_len = (*sfa)->orig_len;
Pravin B Shelare6445712013-10-03 18:16:47 -07001882 kfree(*sfa);
1883 *sfa = acts;
1884
1885out:
1886 (*sfa)->actions_len += req_size;
1887 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1888}
1889
Jesse Grossf0b128c2014-10-03 15:35:31 -07001890static struct nlattr *__add_action(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001891 int attrtype, void *data, int len, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001892{
1893 struct nlattr *a;
1894
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001895 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001896 if (IS_ERR(a))
Jesse Grossf0b128c2014-10-03 15:35:31 -07001897 return a;
Pravin B Shelare6445712013-10-03 18:16:47 -07001898
1899 a->nla_type = attrtype;
1900 a->nla_len = nla_attr_size(len);
1901
1902 if (data)
1903 memcpy(nla_data(a), data, len);
1904 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1905
Jesse Grossf0b128c2014-10-03 15:35:31 -07001906 return a;
1907}
1908
Joe Stringer7f8a4362015-08-26 11:31:48 -07001909int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1910 int len, bool log)
Jesse Grossf0b128c2014-10-03 15:35:31 -07001911{
1912 struct nlattr *a;
1913
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001914 a = __add_action(sfa, attrtype, data, len, log);
Jesse Grossf0b128c2014-10-03 15:35:31 -07001915
Fabian Frederickf35423c12014-11-14 19:32:58 +01001916 return PTR_ERR_OR_ZERO(a);
Pravin B Shelare6445712013-10-03 18:16:47 -07001917}
1918
1919static inline int add_nested_action_start(struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001920 int attrtype, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001921{
1922 int used = (*sfa)->actions_len;
1923 int err;
1924
Joe Stringer7f8a4362015-08-26 11:31:48 -07001925 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001926 if (err)
1927 return err;
1928
1929 return used;
1930}
1931
1932static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1933 int st_offset)
1934{
1935 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1936 st_offset);
1937
1938 a->nla_len = sfa->actions_len - st_offset;
1939}
1940
Joe Stringer7f8a4362015-08-26 11:31:48 -07001941static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
Simon Horman25cd9ba2014-10-06 05:05:13 -07001942 const struct sw_flow_key *key,
1943 int depth, struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001944 __be16 eth_type, __be16 vlan_tci, bool log);
Simon Horman25cd9ba2014-10-06 05:05:13 -07001945
Joe Stringer7f8a4362015-08-26 11:31:48 -07001946static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
Pravin B Shelare6445712013-10-03 18:16:47 -07001947 const struct sw_flow_key *key, int depth,
Simon Horman25cd9ba2014-10-06 05:05:13 -07001948 struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001949 __be16 eth_type, __be16 vlan_tci, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07001950{
1951 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1952 const struct nlattr *probability, *actions;
1953 const struct nlattr *a;
1954 int rem, start, err, st_acts;
1955
1956 memset(attrs, 0, sizeof(attrs));
1957 nla_for_each_nested(a, attr, rem) {
1958 int type = nla_type(a);
1959 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1960 return -EINVAL;
1961 attrs[type] = a;
1962 }
1963 if (rem)
1964 return -EINVAL;
1965
1966 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1967 if (!probability || nla_len(probability) != sizeof(u32))
1968 return -EINVAL;
1969
1970 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1971 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1972 return -EINVAL;
1973
1974 /* validation done, copy sample action. */
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001975 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001976 if (start < 0)
1977 return start;
Joe Stringer7f8a4362015-08-26 11:31:48 -07001978 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1979 nla_data(probability), sizeof(u32), log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001980 if (err)
1981 return err;
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001982 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001983 if (st_acts < 0)
1984 return st_acts;
1985
Joe Stringer7f8a4362015-08-26 11:31:48 -07001986 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08001987 eth_type, vlan_tci, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07001988 if (err)
1989 return err;
1990
1991 add_nested_action_end(*sfa, st_acts);
1992 add_nested_action_end(*sfa, start);
1993
1994 return 0;
1995}
1996
Pravin B Shelare6445712013-10-03 18:16:47 -07001997void ovs_match_init(struct sw_flow_match *match,
1998 struct sw_flow_key *key,
pravin shelar22799942016-09-19 13:51:00 -07001999 bool reset_key,
Pravin B Shelare6445712013-10-03 18:16:47 -07002000 struct sw_flow_mask *mask)
2001{
2002 memset(match, 0, sizeof(*match));
2003 match->key = key;
2004 match->mask = mask;
2005
pravin shelar22799942016-09-19 13:51:00 -07002006 if (reset_key)
2007 memset(key, 0, sizeof(*key));
Pravin B Shelare6445712013-10-03 18:16:47 -07002008
2009 if (mask) {
2010 memset(&mask->key, 0, sizeof(mask->key));
2011 mask->range.start = mask->range.end = 0;
2012 }
2013}
2014
Thomas Grafd91641d2015-01-15 03:53:57 +01002015static int validate_geneve_opts(struct sw_flow_key *key)
2016{
2017 struct geneve_opt *option;
2018 int opts_len = key->tun_opts_len;
2019 bool crit_opt = false;
2020
2021 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2022 while (opts_len > 0) {
2023 int len;
2024
2025 if (opts_len < sizeof(*option))
2026 return -EINVAL;
2027
2028 len = sizeof(*option) + option->length * 4;
2029 if (len > opts_len)
2030 return -EINVAL;
2031
2032 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2033
2034 option = (struct geneve_opt *)((u8 *)option + len);
2035 opts_len -= len;
2036 };
2037
2038 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2039
2040 return 0;
2041}
2042
Pravin B Shelare6445712013-10-03 18:16:47 -07002043static int validate_and_copy_set_tun(const struct nlattr *attr,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002044 struct sw_flow_actions **sfa, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002045{
2046 struct sw_flow_match match;
2047 struct sw_flow_key key;
Thomas Graf34ae9322015-07-21 10:44:03 +02002048 struct metadata_dst *tun_dst;
Thomas Graf1d8fff92015-07-21 10:43:54 +02002049 struct ip_tunnel_info *tun_info;
Thomas Graf34ae9322015-07-21 10:44:03 +02002050 struct ovs_tunnel_info *ovs_tun;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002051 struct nlattr *a;
Geert Uytterhoeven13101602015-02-11 11:23:38 +01002052 int err = 0, start, opts_type;
Pravin B Shelare6445712013-10-03 18:16:47 -07002053
pravin shelar22799942016-09-19 13:51:00 -07002054 ovs_match_init(&match, &key, true, NULL);
Jiri Benc6b26ba32015-10-05 13:09:47 +02002055 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
Thomas Graf1dd144c2015-01-15 03:53:59 +01002056 if (opts_type < 0)
2057 return opts_type;
Pravin B Shelare6445712013-10-03 18:16:47 -07002058
Jesse Grossf5796682014-10-03 15:35:33 -07002059 if (key.tun_opts_len) {
Thomas Graf1dd144c2015-01-15 03:53:59 +01002060 switch (opts_type) {
2061 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2062 err = validate_geneve_opts(&key);
2063 if (err < 0)
2064 return err;
2065 break;
2066 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2067 break;
2068 }
Jesse Grossf5796682014-10-03 15:35:33 -07002069 };
2070
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002071 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002072 if (start < 0)
2073 return start;
2074
Thomas Graf34ae9322015-07-21 10:44:03 +02002075 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
2076 if (!tun_dst)
2077 return -ENOMEM;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002078
Paolo Abenid71785f2016-02-12 15:43:57 +01002079 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2080 if (err) {
2081 dst_release((struct dst_entry *)tun_dst);
2082 return err;
2083 }
2084
Thomas Graf34ae9322015-07-21 10:44:03 +02002085 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2086 sizeof(*ovs_tun), log);
2087 if (IS_ERR(a)) {
2088 dst_release((struct dst_entry *)tun_dst);
2089 return PTR_ERR(a);
2090 }
2091
2092 ovs_tun = nla_data(a);
2093 ovs_tun->tun_dst = tun_dst;
2094
2095 tun_info = &tun_dst->u.tun_info;
2096 tun_info->mode = IP_TUNNEL_INFO_TX;
Jiri Benc00a93ba2015-10-05 13:09:46 +02002097 if (key.tun_proto == AF_INET6)
2098 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
Thomas Graf1d8fff92015-07-21 10:43:54 +02002099 tun_info->key = key.tun_key;
Jesse Grossf5796682014-10-03 15:35:33 -07002100
Pravin B Shelar4c222792015-08-30 18:09:38 -07002101 /* We need to store the options in the action itself since
2102 * everything else will go away after flow setup. We can append
2103 * it to tun_info and then point there.
2104 */
2105 ip_tunnel_info_opts_set(tun_info,
2106 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2107 key.tun_opts_len);
Pravin B Shelare6445712013-10-03 18:16:47 -07002108 add_nested_action_end(*sfa, start);
2109
2110 return err;
2111}
2112
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002113/* Return false if there are any non-masked bits set.
2114 * Mask follows data immediately, before any netlink padding.
2115 */
2116static bool validate_masked(u8 *data, int len)
2117{
2118 u8 *mask = data + len;
2119
2120 while (len--)
2121 if (*data++ & ~*mask++)
2122 return false;
2123
2124 return true;
2125}
2126
Pravin B Shelare6445712013-10-03 18:16:47 -07002127static int validate_set(const struct nlattr *a,
2128 const struct sw_flow_key *flow_key,
2129 struct sw_flow_actions **sfa,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002130 bool *skip_copy, __be16 eth_type, bool masked, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002131{
2132 const struct nlattr *ovs_key = nla_data(a);
2133 int key_type = nla_type(ovs_key);
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002134 size_t key_len;
Pravin B Shelare6445712013-10-03 18:16:47 -07002135
2136 /* There can be only one key in a action */
2137 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2138 return -EINVAL;
2139
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002140 key_len = nla_len(ovs_key);
2141 if (masked)
2142 key_len /= 2;
2143
Pravin B Shelare6445712013-10-03 18:16:47 -07002144 if (key_type > OVS_KEY_ATTR_MAX ||
Jesse Gross982b5272015-09-11 18:38:28 -07002145 !check_attr_len(key_len, ovs_key_lens[key_type].len))
Pravin B Shelare6445712013-10-03 18:16:47 -07002146 return -EINVAL;
2147
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002148 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2149 return -EINVAL;
2150
Pravin B Shelare6445712013-10-03 18:16:47 -07002151 switch (key_type) {
2152 const struct ovs_key_ipv4 *ipv4_key;
2153 const struct ovs_key_ipv6 *ipv6_key;
2154 int err;
2155
2156 case OVS_KEY_ATTR_PRIORITY:
2157 case OVS_KEY_ATTR_SKB_MARK:
Joe Stringer182e3042015-08-26 11:31:49 -07002158 case OVS_KEY_ATTR_CT_MARK:
Joe Stringer33db4122015-10-01 15:00:37 -07002159 case OVS_KEY_ATTR_CT_LABELS:
Pravin B Shelare6445712013-10-03 18:16:47 -07002160 case OVS_KEY_ATTR_ETHERNET:
2161 break;
2162
2163 case OVS_KEY_ATTR_TUNNEL:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002164 if (masked)
2165 return -EINVAL; /* Masked tunnel set not supported. */
2166
2167 *skip_copy = true;
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002168 err = validate_and_copy_set_tun(a, sfa, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002169 if (err)
2170 return err;
2171 break;
2172
2173 case OVS_KEY_ATTR_IPV4:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002174 if (eth_type != htons(ETH_P_IP))
Pravin B Shelare6445712013-10-03 18:16:47 -07002175 return -EINVAL;
2176
Pravin B Shelare6445712013-10-03 18:16:47 -07002177 ipv4_key = nla_data(ovs_key);
Pravin B Shelare6445712013-10-03 18:16:47 -07002178
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002179 if (masked) {
2180 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
Pravin B Shelare6445712013-10-03 18:16:47 -07002181
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002182 /* Non-writeable fields. */
2183 if (mask->ipv4_proto || mask->ipv4_frag)
2184 return -EINVAL;
2185 } else {
2186 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2187 return -EINVAL;
2188
2189 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2190 return -EINVAL;
2191 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002192 break;
2193
2194 case OVS_KEY_ATTR_IPV6:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002195 if (eth_type != htons(ETH_P_IPV6))
Pravin B Shelare6445712013-10-03 18:16:47 -07002196 return -EINVAL;
2197
Pravin B Shelare6445712013-10-03 18:16:47 -07002198 ipv6_key = nla_data(ovs_key);
Pravin B Shelare6445712013-10-03 18:16:47 -07002199
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002200 if (masked) {
2201 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
Pravin B Shelare6445712013-10-03 18:16:47 -07002202
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002203 /* Non-writeable fields. */
2204 if (mask->ipv6_proto || mask->ipv6_frag)
2205 return -EINVAL;
2206
2207 /* Invalid bits in the flow label mask? */
2208 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2209 return -EINVAL;
2210 } else {
2211 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2212 return -EINVAL;
2213
2214 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2215 return -EINVAL;
2216 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002217 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2218 return -EINVAL;
2219
2220 break;
2221
2222 case OVS_KEY_ATTR_TCP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002223 if ((eth_type != htons(ETH_P_IP) &&
2224 eth_type != htons(ETH_P_IPV6)) ||
2225 flow_key->ip.proto != IPPROTO_TCP)
Pravin B Shelare6445712013-10-03 18:16:47 -07002226 return -EINVAL;
2227
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002228 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07002229
2230 case OVS_KEY_ATTR_UDP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002231 if ((eth_type != htons(ETH_P_IP) &&
2232 eth_type != htons(ETH_P_IPV6)) ||
2233 flow_key->ip.proto != IPPROTO_UDP)
Pravin B Shelare6445712013-10-03 18:16:47 -07002234 return -EINVAL;
2235
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002236 break;
Simon Horman25cd9ba2014-10-06 05:05:13 -07002237
2238 case OVS_KEY_ATTR_MPLS:
2239 if (!eth_p_mpls(eth_type))
2240 return -EINVAL;
2241 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07002242
2243 case OVS_KEY_ATTR_SCTP:
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002244 if ((eth_type != htons(ETH_P_IP) &&
2245 eth_type != htons(ETH_P_IPV6)) ||
2246 flow_key->ip.proto != IPPROTO_SCTP)
Pravin B Shelare6445712013-10-03 18:16:47 -07002247 return -EINVAL;
2248
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002249 break;
Pravin B Shelare6445712013-10-03 18:16:47 -07002250
2251 default:
2252 return -EINVAL;
2253 }
2254
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002255 /* Convert non-masked non-tunnel set actions to masked set actions. */
2256 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2257 int start, len = key_len * 2;
2258 struct nlattr *at;
2259
2260 *skip_copy = true;
2261
2262 start = add_nested_action_start(sfa,
2263 OVS_ACTION_ATTR_SET_TO_MASKED,
2264 log);
2265 if (start < 0)
2266 return start;
2267
2268 at = __add_action(sfa, key_type, NULL, len, log);
2269 if (IS_ERR(at))
2270 return PTR_ERR(at);
2271
2272 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2273 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2274 /* Clear non-writeable bits from otherwise writeable fields. */
2275 if (key_type == OVS_KEY_ATTR_IPV6) {
2276 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2277
2278 mask->ipv6_label &= htonl(0x000FFFFF);
2279 }
2280 add_nested_action_end(*sfa, start);
2281 }
2282
Pravin B Shelare6445712013-10-03 18:16:47 -07002283 return 0;
2284}
2285
2286static int validate_userspace(const struct nlattr *attr)
2287{
2288 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2289 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2290 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
Wenyu Zhang8f0aad62014-11-06 06:51:24 -08002291 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
Pravin B Shelare6445712013-10-03 18:16:47 -07002292 };
2293 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2294 int error;
2295
2296 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2297 attr, userspace_policy);
2298 if (error)
2299 return error;
2300
2301 if (!a[OVS_USERSPACE_ATTR_PID] ||
2302 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2303 return -EINVAL;
2304
2305 return 0;
2306}
2307
2308static int copy_action(const struct nlattr *from,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002309 struct sw_flow_actions **sfa, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002310{
2311 int totlen = NLA_ALIGN(from->nla_len);
2312 struct nlattr *to;
2313
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002314 to = reserve_sfa_size(sfa, from->nla_len, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002315 if (IS_ERR(to))
2316 return PTR_ERR(to);
2317
2318 memcpy(to, from, totlen);
2319 return 0;
2320}
2321
Joe Stringer7f8a4362015-08-26 11:31:48 -07002322static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
Simon Horman25cd9ba2014-10-06 05:05:13 -07002323 const struct sw_flow_key *key,
2324 int depth, struct sw_flow_actions **sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002325 __be16 eth_type, __be16 vlan_tci, bool log)
Pravin B Shelare6445712013-10-03 18:16:47 -07002326{
2327 const struct nlattr *a;
2328 int rem, err;
2329
2330 if (depth >= SAMPLE_ACTION_DEPTH)
2331 return -EOVERFLOW;
2332
2333 nla_for_each_nested(a, attr, rem) {
2334 /* Expected argument lengths, (u32)-1 for variable length. */
2335 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2336 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
Andy Zhou971427f32014-09-15 19:37:25 -07002337 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
Pravin B Shelare6445712013-10-03 18:16:47 -07002338 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
Simon Horman25cd9ba2014-10-06 05:05:13 -07002339 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2340 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
Pravin B Shelare6445712013-10-03 18:16:47 -07002341 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2342 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2343 [OVS_ACTION_ATTR_SET] = (u32)-1,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002344 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
Andy Zhou971427f32014-09-15 19:37:25 -07002345 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
Joe Stringer7f8a4362015-08-26 11:31:48 -07002346 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2347 [OVS_ACTION_ATTR_CT] = (u32)-1,
William Tuf2a4d082016-06-10 11:49:33 -07002348 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
Pravin B Shelare6445712013-10-03 18:16:47 -07002349 };
2350 const struct ovs_action_push_vlan *vlan;
2351 int type = nla_type(a);
2352 bool skip_copy;
2353
2354 if (type > OVS_ACTION_ATTR_MAX ||
2355 (action_lens[type] != nla_len(a) &&
2356 action_lens[type] != (u32)-1))
2357 return -EINVAL;
2358
2359 skip_copy = false;
2360 switch (type) {
2361 case OVS_ACTION_ATTR_UNSPEC:
2362 return -EINVAL;
2363
2364 case OVS_ACTION_ATTR_USERSPACE:
2365 err = validate_userspace(a);
2366 if (err)
2367 return err;
2368 break;
2369
2370 case OVS_ACTION_ATTR_OUTPUT:
2371 if (nla_get_u32(a) >= DP_MAX_PORTS)
2372 return -EINVAL;
2373 break;
2374
William Tuf2a4d082016-06-10 11:49:33 -07002375 case OVS_ACTION_ATTR_TRUNC: {
2376 const struct ovs_action_trunc *trunc = nla_data(a);
2377
2378 if (trunc->max_len < ETH_HLEN)
2379 return -EINVAL;
2380 break;
2381 }
2382
Andy Zhou971427f32014-09-15 19:37:25 -07002383 case OVS_ACTION_ATTR_HASH: {
2384 const struct ovs_action_hash *act_hash = nla_data(a);
2385
2386 switch (act_hash->hash_alg) {
2387 case OVS_HASH_ALG_L4:
2388 break;
2389 default:
2390 return -EINVAL;
2391 }
2392
2393 break;
2394 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002395
2396 case OVS_ACTION_ATTR_POP_VLAN:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002397 vlan_tci = htons(0);
Pravin B Shelare6445712013-10-03 18:16:47 -07002398 break;
2399
2400 case OVS_ACTION_ATTR_PUSH_VLAN:
2401 vlan = nla_data(a);
Eric Garver018c1dd2016-09-07 12:56:59 -04002402 if (!eth_type_vlan(vlan->vlan_tpid))
Pravin B Shelare6445712013-10-03 18:16:47 -07002403 return -EINVAL;
2404 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2405 return -EINVAL;
Simon Horman25cd9ba2014-10-06 05:05:13 -07002406 vlan_tci = vlan->vlan_tci;
Pravin B Shelare6445712013-10-03 18:16:47 -07002407 break;
2408
Andy Zhou971427f32014-09-15 19:37:25 -07002409 case OVS_ACTION_ATTR_RECIRC:
2410 break;
2411
Simon Horman25cd9ba2014-10-06 05:05:13 -07002412 case OVS_ACTION_ATTR_PUSH_MPLS: {
2413 const struct ovs_action_push_mpls *mpls = nla_data(a);
2414
Simon Horman25cd9ba2014-10-06 05:05:13 -07002415 if (!eth_p_mpls(mpls->mpls_ethertype))
2416 return -EINVAL;
2417 /* Prohibit push MPLS other than to a white list
2418 * for packets that have a known tag order.
2419 */
2420 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2421 (eth_type != htons(ETH_P_IP) &&
2422 eth_type != htons(ETH_P_IPV6) &&
2423 eth_type != htons(ETH_P_ARP) &&
2424 eth_type != htons(ETH_P_RARP) &&
2425 !eth_p_mpls(eth_type)))
2426 return -EINVAL;
2427 eth_type = mpls->mpls_ethertype;
2428 break;
2429 }
2430
2431 case OVS_ACTION_ATTR_POP_MPLS:
2432 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2433 !eth_p_mpls(eth_type))
2434 return -EINVAL;
2435
2436 /* Disallow subsequent L2.5+ set and mpls_pop actions
2437 * as there is no check here to ensure that the new
2438 * eth_type is valid and thus set actions could
2439 * write off the end of the packet or otherwise
2440 * corrupt it.
2441 *
2442 * Support for these actions is planned using packet
2443 * recirculation.
2444 */
2445 eth_type = htons(0);
2446 break;
2447
Pravin B Shelare6445712013-10-03 18:16:47 -07002448 case OVS_ACTION_ATTR_SET:
Simon Horman25cd9ba2014-10-06 05:05:13 -07002449 err = validate_set(a, key, sfa,
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002450 &skip_copy, eth_type, false, log);
2451 if (err)
2452 return err;
2453 break;
2454
2455 case OVS_ACTION_ATTR_SET_MASKED:
2456 err = validate_set(a, key, sfa,
2457 &skip_copy, eth_type, true, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002458 if (err)
2459 return err;
2460 break;
2461
2462 case OVS_ACTION_ATTR_SAMPLE:
Joe Stringer7f8a4362015-08-26 11:31:48 -07002463 err = validate_and_copy_sample(net, a, key, depth, sfa,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002464 eth_type, vlan_tci, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002465 if (err)
2466 return err;
2467 skip_copy = true;
2468 break;
2469
Joe Stringer7f8a4362015-08-26 11:31:48 -07002470 case OVS_ACTION_ATTR_CT:
2471 err = ovs_ct_copy_action(net, a, key, sfa, log);
2472 if (err)
2473 return err;
2474 skip_copy = true;
2475 break;
2476
Pravin B Shelare6445712013-10-03 18:16:47 -07002477 default:
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002478 OVS_NLERR(log, "Unknown Action type %d", type);
Pravin B Shelare6445712013-10-03 18:16:47 -07002479 return -EINVAL;
2480 }
2481 if (!skip_copy) {
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002482 err = copy_action(a, sfa, log);
Pravin B Shelare6445712013-10-03 18:16:47 -07002483 if (err)
2484 return err;
2485 }
2486 }
2487
2488 if (rem > 0)
2489 return -EINVAL;
2490
2491 return 0;
2492}
2493
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002494/* 'key' must be the masked key. */
Joe Stringer7f8a4362015-08-26 11:31:48 -07002495int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
Simon Horman25cd9ba2014-10-06 05:05:13 -07002496 const struct sw_flow_key *key,
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002497 struct sw_flow_actions **sfa, bool log)
Simon Horman25cd9ba2014-10-06 05:05:13 -07002498{
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002499 int err;
2500
Jarno Rajahalme05da5892014-11-06 07:03:05 -08002501 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002502 if (IS_ERR(*sfa))
2503 return PTR_ERR(*sfa);
2504
Joe Stringer8e2fed12015-08-26 11:31:44 -07002505 (*sfa)->orig_len = nla_len(attr);
Joe Stringer7f8a4362015-08-26 11:31:48 -07002506 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
Eric Garver018c1dd2016-09-07 12:56:59 -04002507 key->eth.vlan.tci, log);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002508 if (err)
Thomas Graf34ae9322015-07-21 10:44:03 +02002509 ovs_nla_free_flow_actions(*sfa);
Pravin B Shelar2fdb9572014-10-19 11:19:51 -07002510
2511 return err;
Simon Horman25cd9ba2014-10-06 05:05:13 -07002512}
2513
Pravin B Shelare6445712013-10-03 18:16:47 -07002514static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2515{
2516 const struct nlattr *a;
2517 struct nlattr *start;
2518 int err = 0, rem;
2519
2520 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2521 if (!start)
2522 return -EMSGSIZE;
2523
2524 nla_for_each_nested(a, attr, rem) {
2525 int type = nla_type(a);
2526 struct nlattr *st_sample;
2527
2528 switch (type) {
2529 case OVS_SAMPLE_ATTR_PROBABILITY:
2530 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2531 sizeof(u32), nla_data(a)))
2532 return -EMSGSIZE;
2533 break;
2534 case OVS_SAMPLE_ATTR_ACTIONS:
2535 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2536 if (!st_sample)
2537 return -EMSGSIZE;
2538 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2539 if (err)
2540 return err;
2541 nla_nest_end(skb, st_sample);
2542 break;
2543 }
2544 }
2545
2546 nla_nest_end(skb, start);
2547 return err;
2548}
2549
2550static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2551{
2552 const struct nlattr *ovs_key = nla_data(a);
2553 int key_type = nla_type(ovs_key);
2554 struct nlattr *start;
2555 int err;
2556
2557 switch (key_type) {
Jesse Grossf0b128c2014-10-03 15:35:31 -07002558 case OVS_KEY_ATTR_TUNNEL_INFO: {
Thomas Graf34ae9322015-07-21 10:44:03 +02002559 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2560 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002561
Pravin B Shelare6445712013-10-03 18:16:47 -07002562 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2563 if (!start)
2564 return -EMSGSIZE;
2565
Simon Hormane905eab2015-12-18 19:43:15 +09002566 err = ip_tun_to_nlattr(skb, &tun_info->key,
2567 ip_tunnel_info_opts(tun_info),
2568 tun_info->options_len,
2569 ip_tunnel_info_af(tun_info));
Pravin B Shelare6445712013-10-03 18:16:47 -07002570 if (err)
2571 return err;
2572 nla_nest_end(skb, start);
2573 break;
Jesse Grossf0b128c2014-10-03 15:35:31 -07002574 }
Pravin B Shelare6445712013-10-03 18:16:47 -07002575 default:
2576 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2577 return -EMSGSIZE;
2578 break;
2579 }
2580
2581 return 0;
2582}
2583
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002584static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2585 struct sk_buff *skb)
2586{
2587 const struct nlattr *ovs_key = nla_data(a);
Joe Stringerf4f8e732015-03-02 18:49:56 -08002588 struct nlattr *nla;
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002589 size_t key_len = nla_len(ovs_key) / 2;
2590
2591 /* Revert the conversion we did from a non-masked set action to
2592 * masked set action.
2593 */
Joe Stringerf4f8e732015-03-02 18:49:56 -08002594 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2595 if (!nla)
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002596 return -EMSGSIZE;
2597
Joe Stringerf4f8e732015-03-02 18:49:56 -08002598 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2599 return -EMSGSIZE;
2600
2601 nla_nest_end(skb, nla);
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002602 return 0;
2603}
2604
Pravin B Shelare6445712013-10-03 18:16:47 -07002605int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2606{
2607 const struct nlattr *a;
2608 int rem, err;
2609
2610 nla_for_each_attr(a, attr, len, rem) {
2611 int type = nla_type(a);
2612
2613 switch (type) {
2614 case OVS_ACTION_ATTR_SET:
2615 err = set_action_to_attr(a, skb);
2616 if (err)
2617 return err;
2618 break;
2619
Jarno Rajahalme83d2b9b2015-02-05 13:40:49 -08002620 case OVS_ACTION_ATTR_SET_TO_MASKED:
2621 err = masked_set_action_to_set_action_attr(a, skb);
2622 if (err)
2623 return err;
2624 break;
2625
Pravin B Shelare6445712013-10-03 18:16:47 -07002626 case OVS_ACTION_ATTR_SAMPLE:
2627 err = sample_action_to_attr(a, skb);
2628 if (err)
2629 return err;
2630 break;
Joe Stringer7f8a4362015-08-26 11:31:48 -07002631
2632 case OVS_ACTION_ATTR_CT:
2633 err = ovs_ct_action_to_attr(nla_data(a), skb);
2634 if (err)
2635 return err;
2636 break;
2637
Pravin B Shelare6445712013-10-03 18:16:47 -07002638 default:
2639 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2640 return -EMSGSIZE;
2641 break;
2642 }
2643 }
2644
2645 return 0;
2646}