Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1 | /* |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301, USA |
| 17 | */ |
| 18 | |
Joe Perches | 2235ad1 | 2014-02-03 17:18:21 -0800 | [diff] [blame] | 19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 20 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 21 | #include "flow.h" |
| 22 | #include "datapath.h" |
| 23 | #include <linux/uaccess.h> |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/etherdevice.h> |
| 26 | #include <linux/if_ether.h> |
| 27 | #include <linux/if_vlan.h> |
| 28 | #include <net/llc_pdu.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/jhash.h> |
| 31 | #include <linux/jiffies.h> |
| 32 | #include <linux/llc.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/in.h> |
| 35 | #include <linux/rcupdate.h> |
| 36 | #include <linux/if_arp.h> |
| 37 | #include <linux/ip.h> |
| 38 | #include <linux/ipv6.h> |
| 39 | #include <linux/sctp.h> |
| 40 | #include <linux/tcp.h> |
| 41 | #include <linux/udp.h> |
| 42 | #include <linux/icmp.h> |
| 43 | #include <linux/icmpv6.h> |
| 44 | #include <linux/rculist.h> |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 45 | #include <net/geneve.h> |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 46 | #include <net/ip.h> |
| 47 | #include <net/ipv6.h> |
| 48 | #include <net/ndisc.h> |
| 49 | |
| 50 | #include "flow_netlink.h" |
| 51 | |
| 52 | static void update_range__(struct sw_flow_match *match, |
| 53 | size_t offset, size_t size, bool is_mask) |
| 54 | { |
| 55 | struct sw_flow_key_range *range = NULL; |
| 56 | size_t start = rounddown(offset, sizeof(long)); |
| 57 | size_t end = roundup(offset + size, sizeof(long)); |
| 58 | |
| 59 | if (!is_mask) |
| 60 | range = &match->range; |
| 61 | else if (match->mask) |
| 62 | range = &match->mask->range; |
| 63 | |
| 64 | if (!range) |
| 65 | return; |
| 66 | |
| 67 | if (range->start == range->end) { |
| 68 | range->start = start; |
| 69 | range->end = end; |
| 70 | return; |
| 71 | } |
| 72 | |
| 73 | if (range->start > start) |
| 74 | range->start = start; |
| 75 | |
| 76 | if (range->end < end) |
| 77 | range->end = end; |
| 78 | } |
| 79 | |
| 80 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ |
| 81 | do { \ |
| 82 | update_range__(match, offsetof(struct sw_flow_key, field), \ |
| 83 | sizeof((match)->key->field), is_mask); \ |
| 84 | if (is_mask) { \ |
| 85 | if ((match)->mask) \ |
| 86 | (match)->mask->key.field = value; \ |
| 87 | } else { \ |
| 88 | (match)->key->field = value; \ |
| 89 | } \ |
| 90 | } while (0) |
| 91 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 92 | #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \ |
| 93 | do { \ |
| 94 | update_range__(match, offset, len, is_mask); \ |
| 95 | if (is_mask) \ |
| 96 | memcpy((u8 *)&(match)->mask->key + offset, value_p, \ |
| 97 | len); \ |
| 98 | else \ |
| 99 | memcpy((u8 *)(match)->key + offset, value_p, len); \ |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 100 | } while (0) |
| 101 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 102 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ |
| 103 | SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \ |
| 104 | value_p, len, is_mask) |
| 105 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 106 | static u16 range_n_bytes(const struct sw_flow_key_range *range) |
| 107 | { |
| 108 | return range->end - range->start; |
| 109 | } |
| 110 | |
| 111 | static bool match_validate(const struct sw_flow_match *match, |
| 112 | u64 key_attrs, u64 mask_attrs) |
| 113 | { |
| 114 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; |
| 115 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ |
| 116 | |
| 117 | /* The following mask attributes allowed only if they |
| 118 | * pass the validation tests. */ |
| 119 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) |
| 120 | | (1 << OVS_KEY_ATTR_IPV6) |
| 121 | | (1 << OVS_KEY_ATTR_TCP) |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 122 | | (1 << OVS_KEY_ATTR_TCP_FLAGS) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 123 | | (1 << OVS_KEY_ATTR_UDP) |
| 124 | | (1 << OVS_KEY_ATTR_SCTP) |
| 125 | | (1 << OVS_KEY_ATTR_ICMP) |
| 126 | | (1 << OVS_KEY_ATTR_ICMPV6) |
| 127 | | (1 << OVS_KEY_ATTR_ARP) |
| 128 | | (1 << OVS_KEY_ATTR_ND)); |
| 129 | |
| 130 | /* Always allowed mask fields. */ |
| 131 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) |
| 132 | | (1 << OVS_KEY_ATTR_IN_PORT) |
| 133 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); |
| 134 | |
| 135 | /* Check key attributes. */ |
| 136 | if (match->key->eth.type == htons(ETH_P_ARP) |
| 137 | || match->key->eth.type == htons(ETH_P_RARP)) { |
| 138 | key_expected |= 1 << OVS_KEY_ATTR_ARP; |
| 139 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
| 140 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; |
| 141 | } |
| 142 | |
| 143 | if (match->key->eth.type == htons(ETH_P_IP)) { |
| 144 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; |
| 145 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
| 146 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; |
| 147 | |
| 148 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { |
| 149 | if (match->key->ip.proto == IPPROTO_UDP) { |
| 150 | key_expected |= 1 << OVS_KEY_ATTR_UDP; |
| 151 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 152 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; |
| 153 | } |
| 154 | |
| 155 | if (match->key->ip.proto == IPPROTO_SCTP) { |
| 156 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; |
| 157 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 158 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; |
| 159 | } |
| 160 | |
| 161 | if (match->key->ip.proto == IPPROTO_TCP) { |
| 162 | key_expected |= 1 << OVS_KEY_ATTR_TCP; |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 163 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
| 164 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 165 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 166 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
| 167 | } |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | if (match->key->ip.proto == IPPROTO_ICMP) { |
| 171 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; |
| 172 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 173 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | if (match->key->eth.type == htons(ETH_P_IPV6)) { |
| 179 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; |
| 180 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) |
| 181 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; |
| 182 | |
| 183 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { |
| 184 | if (match->key->ip.proto == IPPROTO_UDP) { |
| 185 | key_expected |= 1 << OVS_KEY_ATTR_UDP; |
| 186 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 187 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; |
| 188 | } |
| 189 | |
| 190 | if (match->key->ip.proto == IPPROTO_SCTP) { |
| 191 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; |
| 192 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 193 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; |
| 194 | } |
| 195 | |
| 196 | if (match->key->ip.proto == IPPROTO_TCP) { |
| 197 | key_expected |= 1 << OVS_KEY_ATTR_TCP; |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 198 | key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
| 199 | if (match->mask && (match->mask->key.ip.proto == 0xff)) { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 200 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 201 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS; |
| 202 | } |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | if (match->key->ip.proto == IPPROTO_ICMPV6) { |
| 206 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; |
| 207 | if (match->mask && (match->mask->key.ip.proto == 0xff)) |
| 208 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; |
| 209 | |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 210 | if (match->key->tp.src == |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 211 | htons(NDISC_NEIGHBOUR_SOLICITATION) || |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 212 | match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 213 | key_expected |= 1 << OVS_KEY_ATTR_ND; |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 214 | if (match->mask && (match->mask->key.tp.src == htons(0xffff))) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 215 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | if ((key_attrs & key_expected) != key_expected) { |
| 222 | /* Key attributes check failed. */ |
| 223 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", |
Daniele Di Proietto | cc23ebf | 2014-02-03 14:09:01 -0800 | [diff] [blame] | 224 | (unsigned long long)key_attrs, (unsigned long long)key_expected); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 225 | return false; |
| 226 | } |
| 227 | |
| 228 | if ((mask_attrs & mask_allowed) != mask_attrs) { |
| 229 | /* Mask attributes check failed. */ |
| 230 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", |
Daniele Di Proietto | cc23ebf | 2014-02-03 14:09:01 -0800 | [diff] [blame] | 231 | (unsigned long long)mask_attrs, (unsigned long long)mask_allowed); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 232 | return false; |
| 233 | } |
| 234 | |
| 235 | return true; |
| 236 | } |
| 237 | |
| 238 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
| 239 | static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
| 240 | [OVS_KEY_ATTR_ENCAP] = -1, |
| 241 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), |
| 242 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), |
| 243 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
| 244 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
| 245 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), |
| 246 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), |
| 247 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), |
| 248 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), |
| 249 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 250 | [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16), |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 251 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), |
| 252 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), |
| 253 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), |
| 254 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), |
| 255 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), |
| 256 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 257 | [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32), |
| 258 | [OVS_KEY_ATTR_DP_HASH] = sizeof(u32), |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 259 | [OVS_KEY_ATTR_TUNNEL] = -1, |
| 260 | }; |
| 261 | |
| 262 | static bool is_all_zero(const u8 *fp, size_t size) |
| 263 | { |
| 264 | int i; |
| 265 | |
| 266 | if (!fp) |
| 267 | return false; |
| 268 | |
| 269 | for (i = 0; i < size; i++) |
| 270 | if (fp[i]) |
| 271 | return false; |
| 272 | |
| 273 | return true; |
| 274 | } |
| 275 | |
| 276 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
| 277 | const struct nlattr *a[], |
| 278 | u64 *attrsp, bool nz) |
| 279 | { |
| 280 | const struct nlattr *nla; |
| 281 | u64 attrs; |
| 282 | int rem; |
| 283 | |
| 284 | attrs = *attrsp; |
| 285 | nla_for_each_nested(nla, attr, rem) { |
| 286 | u16 type = nla_type(nla); |
| 287 | int expected_len; |
| 288 | |
| 289 | if (type > OVS_KEY_ATTR_MAX) { |
| 290 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", |
| 291 | type, OVS_KEY_ATTR_MAX); |
| 292 | return -EINVAL; |
| 293 | } |
| 294 | |
| 295 | if (attrs & (1 << type)) { |
| 296 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); |
| 297 | return -EINVAL; |
| 298 | } |
| 299 | |
| 300 | expected_len = ovs_key_lens[type]; |
| 301 | if (nla_len(nla) != expected_len && expected_len != -1) { |
| 302 | OVS_NLERR("Key attribute has unexpected length (type=%d" |
| 303 | ", length=%d, expected=%d).\n", type, |
| 304 | nla_len(nla), expected_len); |
| 305 | return -EINVAL; |
| 306 | } |
| 307 | |
| 308 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { |
| 309 | attrs |= 1 << type; |
| 310 | a[type] = nla; |
| 311 | } |
| 312 | } |
| 313 | if (rem) { |
| 314 | OVS_NLERR("Message has %d unknown bytes.\n", rem); |
| 315 | return -EINVAL; |
| 316 | } |
| 317 | |
| 318 | *attrsp = attrs; |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
| 323 | const struct nlattr *a[], u64 *attrsp) |
| 324 | { |
| 325 | return __parse_flow_nlattrs(attr, a, attrsp, true); |
| 326 | } |
| 327 | |
| 328 | static int parse_flow_nlattrs(const struct nlattr *attr, |
| 329 | const struct nlattr *a[], u64 *attrsp) |
| 330 | { |
| 331 | return __parse_flow_nlattrs(attr, a, attrsp, false); |
| 332 | } |
| 333 | |
| 334 | static int ipv4_tun_from_nlattr(const struct nlattr *attr, |
| 335 | struct sw_flow_match *match, bool is_mask) |
| 336 | { |
| 337 | struct nlattr *a; |
| 338 | int rem; |
| 339 | bool ttl = false; |
| 340 | __be16 tun_flags = 0; |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 341 | unsigned long opt_key_offset; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 342 | |
| 343 | nla_for_each_nested(a, attr, rem) { |
| 344 | int type = nla_type(a); |
| 345 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { |
| 346 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), |
| 347 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), |
| 348 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), |
| 349 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, |
| 350 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, |
| 351 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, |
| 352 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 353 | [OVS_TUNNEL_KEY_ATTR_OAM] = 0, |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 354 | [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1, |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 355 | }; |
| 356 | |
| 357 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
| 358 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", |
| 359 | type, OVS_TUNNEL_KEY_ATTR_MAX); |
| 360 | return -EINVAL; |
| 361 | } |
| 362 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 363 | if (ovs_tunnel_key_lens[type] != nla_len(a) && |
| 364 | ovs_tunnel_key_lens[type] != -1) { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 365 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " |
| 366 | " length (type=%d, length=%d, expected=%d).\n", |
| 367 | type, nla_len(a), ovs_tunnel_key_lens[type]); |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | |
| 371 | switch (type) { |
| 372 | case OVS_TUNNEL_KEY_ATTR_ID: |
| 373 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
| 374 | nla_get_be64(a), is_mask); |
| 375 | tun_flags |= TUNNEL_KEY; |
| 376 | break; |
| 377 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: |
| 378 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
| 379 | nla_get_be32(a), is_mask); |
| 380 | break; |
| 381 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: |
| 382 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
| 383 | nla_get_be32(a), is_mask); |
| 384 | break; |
| 385 | case OVS_TUNNEL_KEY_ATTR_TOS: |
| 386 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
| 387 | nla_get_u8(a), is_mask); |
| 388 | break; |
| 389 | case OVS_TUNNEL_KEY_ATTR_TTL: |
| 390 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
| 391 | nla_get_u8(a), is_mask); |
| 392 | ttl = true; |
| 393 | break; |
| 394 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: |
| 395 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
| 396 | break; |
| 397 | case OVS_TUNNEL_KEY_ATTR_CSUM: |
| 398 | tun_flags |= TUNNEL_CSUM; |
| 399 | break; |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 400 | case OVS_TUNNEL_KEY_ATTR_OAM: |
| 401 | tun_flags |= TUNNEL_OAM; |
| 402 | break; |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 403 | case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS: |
| 404 | tun_flags |= TUNNEL_OPTIONS_PRESENT; |
| 405 | if (nla_len(a) > sizeof(match->key->tun_opts)) { |
| 406 | OVS_NLERR("Geneve option length exceeds maximum size (len %d, max %zu).\n", |
| 407 | nla_len(a), |
| 408 | sizeof(match->key->tun_opts)); |
| 409 | return -EINVAL; |
| 410 | } |
| 411 | |
| 412 | if (nla_len(a) % 4 != 0) { |
| 413 | OVS_NLERR("Geneve option length is not a multiple of 4 (len %d).\n", |
| 414 | nla_len(a)); |
| 415 | return -EINVAL; |
| 416 | } |
| 417 | |
| 418 | /* We need to record the length of the options passed |
| 419 | * down, otherwise packets with the same format but |
| 420 | * additional options will be silently matched. |
| 421 | */ |
| 422 | if (!is_mask) { |
| 423 | SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a), |
| 424 | false); |
| 425 | } else { |
| 426 | /* This is somewhat unusual because it looks at |
| 427 | * both the key and mask while parsing the |
| 428 | * attributes (and by extension assumes the key |
| 429 | * is parsed first). Normally, we would verify |
| 430 | * that each is the correct length and that the |
| 431 | * attributes line up in the validate function. |
| 432 | * However, that is difficult because this is |
| 433 | * variable length and we won't have the |
| 434 | * information later. |
| 435 | */ |
| 436 | if (match->key->tun_opts_len != nla_len(a)) { |
| 437 | OVS_NLERR("Geneve option key length (%d) is different from mask length (%d).", |
| 438 | match->key->tun_opts_len, |
| 439 | nla_len(a)); |
| 440 | return -EINVAL; |
| 441 | } |
| 442 | |
| 443 | SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, |
| 444 | true); |
| 445 | } |
| 446 | |
| 447 | opt_key_offset = (unsigned long)GENEVE_OPTS( |
| 448 | (struct sw_flow_key *)0, |
| 449 | nla_len(a)); |
| 450 | SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, |
| 451 | nla_data(a), nla_len(a), |
| 452 | is_mask); |
| 453 | break; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 454 | default: |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 455 | OVS_NLERR("Unknown IPv4 tunnel attribute (%d).\n", |
| 456 | type); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 457 | return -EINVAL; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); |
| 462 | |
| 463 | if (rem > 0) { |
| 464 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); |
| 465 | return -EINVAL; |
| 466 | } |
| 467 | |
| 468 | if (!is_mask) { |
| 469 | if (!match->key->tun_key.ipv4_dst) { |
| 470 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); |
| 471 | return -EINVAL; |
| 472 | } |
| 473 | |
| 474 | if (!ttl) { |
| 475 | OVS_NLERR("IPv4 tunnel TTL not specified.\n"); |
| 476 | return -EINVAL; |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 483 | static int __ipv4_tun_to_nlattr(struct sk_buff *skb, |
| 484 | const struct ovs_key_ipv4_tunnel *output, |
| 485 | const struct geneve_opt *tun_opts, |
| 486 | int swkey_tun_opts_len) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 487 | { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 488 | if (output->tun_flags & TUNNEL_KEY && |
| 489 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) |
| 490 | return -EMSGSIZE; |
| 491 | if (output->ipv4_src && |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 492 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 493 | return -EMSGSIZE; |
| 494 | if (output->ipv4_dst && |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 495 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 496 | return -EMSGSIZE; |
| 497 | if (output->ipv4_tos && |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 498 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 499 | return -EMSGSIZE; |
| 500 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
| 501 | return -EMSGSIZE; |
| 502 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 503 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 504 | return -EMSGSIZE; |
| 505 | if ((output->tun_flags & TUNNEL_CSUM) && |
Jesse Gross | 67fa034 | 2014-10-03 15:35:30 -0700 | [diff] [blame] | 506 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
| 507 | return -EMSGSIZE; |
| 508 | if ((output->tun_flags & TUNNEL_OAM) && |
| 509 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM)) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 510 | return -EMSGSIZE; |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 511 | if (tun_opts && |
| 512 | nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, |
| 513 | swkey_tun_opts_len, tun_opts)) |
| 514 | return -EMSGSIZE; |
| 515 | |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | |
| 520 | static int ipv4_tun_to_nlattr(struct sk_buff *skb, |
| 521 | const struct ovs_key_ipv4_tunnel *output, |
| 522 | const struct geneve_opt *tun_opts, |
| 523 | int swkey_tun_opts_len) |
| 524 | { |
| 525 | struct nlattr *nla; |
| 526 | int err; |
| 527 | |
| 528 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); |
| 529 | if (!nla) |
| 530 | return -EMSGSIZE; |
| 531 | |
| 532 | err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len); |
| 533 | if (err) |
| 534 | return err; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 535 | |
| 536 | nla_nest_end(skb, nla); |
| 537 | return 0; |
| 538 | } |
| 539 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 540 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
| 541 | const struct nlattr **a, bool is_mask) |
| 542 | { |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 543 | if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) { |
| 544 | u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]); |
| 545 | |
| 546 | SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask); |
| 547 | *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH); |
| 548 | } |
| 549 | |
| 550 | if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) { |
| 551 | u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]); |
| 552 | |
| 553 | SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask); |
| 554 | *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID); |
| 555 | } |
| 556 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 557 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
| 558 | SW_FLOW_KEY_PUT(match, phy.priority, |
| 559 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); |
| 560 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); |
| 561 | } |
| 562 | |
| 563 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { |
| 564 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); |
| 565 | |
| 566 | if (is_mask) |
| 567 | in_port = 0xffffffff; /* Always exact match in_port. */ |
| 568 | else if (in_port >= DP_MAX_PORTS) |
| 569 | return -EINVAL; |
| 570 | |
| 571 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
| 572 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); |
| 573 | } else if (!is_mask) { |
| 574 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); |
| 575 | } |
| 576 | |
| 577 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { |
| 578 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); |
| 579 | |
| 580 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); |
| 581 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); |
| 582 | } |
| 583 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { |
| 584 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, |
| 585 | is_mask)) |
| 586 | return -EINVAL; |
| 587 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); |
| 588 | } |
| 589 | return 0; |
| 590 | } |
| 591 | |
Jarno Rajahalme | 23dabf8 | 2014-03-27 12:35:23 -0700 | [diff] [blame] | 592 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
| 593 | const struct nlattr **a, bool is_mask) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 594 | { |
| 595 | int err; |
| 596 | u64 orig_attrs = attrs; |
| 597 | |
| 598 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
| 599 | if (err) |
| 600 | return err; |
| 601 | |
| 602 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { |
| 603 | const struct ovs_key_ethernet *eth_key; |
| 604 | |
| 605 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
| 606 | SW_FLOW_KEY_MEMCPY(match, eth.src, |
| 607 | eth_key->eth_src, ETH_ALEN, is_mask); |
| 608 | SW_FLOW_KEY_MEMCPY(match, eth.dst, |
| 609 | eth_key->eth_dst, ETH_ALEN, is_mask); |
| 610 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); |
| 611 | } |
| 612 | |
| 613 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { |
| 614 | __be16 tci; |
| 615 | |
| 616 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
| 617 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
| 618 | if (is_mask) |
| 619 | OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); |
| 620 | else |
| 621 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); |
| 622 | |
| 623 | return -EINVAL; |
| 624 | } |
| 625 | |
| 626 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); |
| 627 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); |
| 628 | } else if (!is_mask) |
| 629 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); |
| 630 | |
| 631 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { |
| 632 | __be16 eth_type; |
| 633 | |
| 634 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
| 635 | if (is_mask) { |
| 636 | /* Always exact match EtherType. */ |
| 637 | eth_type = htons(0xffff); |
| 638 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { |
| 639 | OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", |
| 640 | ntohs(eth_type), ETH_P_802_3_MIN); |
| 641 | return -EINVAL; |
| 642 | } |
| 643 | |
| 644 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); |
| 645 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); |
| 646 | } else if (!is_mask) { |
| 647 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); |
| 648 | } |
| 649 | |
| 650 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { |
| 651 | const struct ovs_key_ipv4 *ipv4_key; |
| 652 | |
| 653 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); |
| 654 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { |
| 655 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", |
| 656 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); |
| 657 | return -EINVAL; |
| 658 | } |
| 659 | SW_FLOW_KEY_PUT(match, ip.proto, |
| 660 | ipv4_key->ipv4_proto, is_mask); |
| 661 | SW_FLOW_KEY_PUT(match, ip.tos, |
| 662 | ipv4_key->ipv4_tos, is_mask); |
| 663 | SW_FLOW_KEY_PUT(match, ip.ttl, |
| 664 | ipv4_key->ipv4_ttl, is_mask); |
| 665 | SW_FLOW_KEY_PUT(match, ip.frag, |
| 666 | ipv4_key->ipv4_frag, is_mask); |
| 667 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, |
| 668 | ipv4_key->ipv4_src, is_mask); |
| 669 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, |
| 670 | ipv4_key->ipv4_dst, is_mask); |
| 671 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); |
| 672 | } |
| 673 | |
| 674 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { |
| 675 | const struct ovs_key_ipv6 *ipv6_key; |
| 676 | |
| 677 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
| 678 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { |
| 679 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", |
| 680 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); |
| 681 | return -EINVAL; |
| 682 | } |
| 683 | SW_FLOW_KEY_PUT(match, ipv6.label, |
| 684 | ipv6_key->ipv6_label, is_mask); |
| 685 | SW_FLOW_KEY_PUT(match, ip.proto, |
| 686 | ipv6_key->ipv6_proto, is_mask); |
| 687 | SW_FLOW_KEY_PUT(match, ip.tos, |
| 688 | ipv6_key->ipv6_tclass, is_mask); |
| 689 | SW_FLOW_KEY_PUT(match, ip.ttl, |
| 690 | ipv6_key->ipv6_hlimit, is_mask); |
| 691 | SW_FLOW_KEY_PUT(match, ip.frag, |
| 692 | ipv6_key->ipv6_frag, is_mask); |
| 693 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, |
| 694 | ipv6_key->ipv6_src, |
| 695 | sizeof(match->key->ipv6.addr.src), |
| 696 | is_mask); |
| 697 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, |
| 698 | ipv6_key->ipv6_dst, |
| 699 | sizeof(match->key->ipv6.addr.dst), |
| 700 | is_mask); |
| 701 | |
| 702 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); |
| 703 | } |
| 704 | |
| 705 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { |
| 706 | const struct ovs_key_arp *arp_key; |
| 707 | |
| 708 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); |
| 709 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { |
| 710 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", |
| 711 | arp_key->arp_op); |
| 712 | return -EINVAL; |
| 713 | } |
| 714 | |
| 715 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, |
| 716 | arp_key->arp_sip, is_mask); |
| 717 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, |
| 718 | arp_key->arp_tip, is_mask); |
| 719 | SW_FLOW_KEY_PUT(match, ip.proto, |
| 720 | ntohs(arp_key->arp_op), is_mask); |
| 721 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, |
| 722 | arp_key->arp_sha, ETH_ALEN, is_mask); |
| 723 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, |
| 724 | arp_key->arp_tha, ETH_ALEN, is_mask); |
| 725 | |
| 726 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); |
| 727 | } |
| 728 | |
| 729 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
| 730 | const struct ovs_key_tcp *tcp_key; |
| 731 | |
| 732 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 733 | SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask); |
| 734 | SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 735 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); |
| 736 | } |
| 737 | |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 738 | if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) { |
| 739 | if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 740 | SW_FLOW_KEY_PUT(match, tp.flags, |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 741 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), |
| 742 | is_mask); |
| 743 | } else { |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 744 | SW_FLOW_KEY_PUT(match, tp.flags, |
Jarno Rajahalme | 5eb26b1 | 2013-10-23 01:44:59 -0700 | [diff] [blame] | 745 | nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]), |
| 746 | is_mask); |
| 747 | } |
| 748 | attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS); |
| 749 | } |
| 750 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 751 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { |
| 752 | const struct ovs_key_udp *udp_key; |
| 753 | |
| 754 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 755 | SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask); |
| 756 | SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 757 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); |
| 758 | } |
| 759 | |
| 760 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { |
| 761 | const struct ovs_key_sctp *sctp_key; |
| 762 | |
| 763 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 764 | SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask); |
| 765 | SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 766 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); |
| 767 | } |
| 768 | |
| 769 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { |
| 770 | const struct ovs_key_icmp *icmp_key; |
| 771 | |
| 772 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 773 | SW_FLOW_KEY_PUT(match, tp.src, |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 774 | htons(icmp_key->icmp_type), is_mask); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 775 | SW_FLOW_KEY_PUT(match, tp.dst, |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 776 | htons(icmp_key->icmp_code), is_mask); |
| 777 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); |
| 778 | } |
| 779 | |
| 780 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { |
| 781 | const struct ovs_key_icmpv6 *icmpv6_key; |
| 782 | |
| 783 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 784 | SW_FLOW_KEY_PUT(match, tp.src, |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 785 | htons(icmpv6_key->icmpv6_type), is_mask); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 786 | SW_FLOW_KEY_PUT(match, tp.dst, |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 787 | htons(icmpv6_key->icmpv6_code), is_mask); |
| 788 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); |
| 789 | } |
| 790 | |
| 791 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { |
| 792 | const struct ovs_key_nd *nd_key; |
| 793 | |
| 794 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); |
| 795 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, |
| 796 | nd_key->nd_target, |
| 797 | sizeof(match->key->ipv6.nd.target), |
| 798 | is_mask); |
| 799 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, |
| 800 | nd_key->nd_sll, ETH_ALEN, is_mask); |
| 801 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, |
| 802 | nd_key->nd_tll, ETH_ALEN, is_mask); |
| 803 | attrs &= ~(1 << OVS_KEY_ATTR_ND); |
| 804 | } |
| 805 | |
| 806 | if (attrs != 0) |
| 807 | return -EINVAL; |
| 808 | |
| 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | static void sw_flow_mask_set(struct sw_flow_mask *mask, |
| 813 | struct sw_flow_key_range *range, u8 val) |
| 814 | { |
| 815 | u8 *m = (u8 *)&mask->key + range->start; |
| 816 | |
| 817 | mask->range = *range; |
| 818 | memset(m, val, range_n_bytes(range)); |
| 819 | } |
| 820 | |
| 821 | /** |
| 822 | * ovs_nla_get_match - parses Netlink attributes into a flow key and |
| 823 | * mask. In case the 'mask' is NULL, the flow is treated as exact match |
| 824 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask |
| 825 | * does not include any don't care bit. |
| 826 | * @match: receives the extracted flow match information. |
| 827 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
| 828 | * sequence. The fields should of the packet that triggered the creation |
| 829 | * of this flow. |
| 830 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink |
| 831 | * attribute specifies the mask field of the wildcarded flow. |
| 832 | */ |
| 833 | int ovs_nla_get_match(struct sw_flow_match *match, |
| 834 | const struct nlattr *key, |
| 835 | const struct nlattr *mask) |
| 836 | { |
| 837 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
| 838 | const struct nlattr *encap; |
| 839 | u64 key_attrs = 0; |
| 840 | u64 mask_attrs = 0; |
| 841 | bool encap_valid = false; |
| 842 | int err; |
| 843 | |
| 844 | err = parse_flow_nlattrs(key, a, &key_attrs); |
| 845 | if (err) |
| 846 | return err; |
| 847 | |
| 848 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && |
| 849 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && |
| 850 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { |
| 851 | __be16 tci; |
| 852 | |
| 853 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && |
| 854 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { |
| 855 | OVS_NLERR("Invalid Vlan frame.\n"); |
| 856 | return -EINVAL; |
| 857 | } |
| 858 | |
| 859 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); |
| 860 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
| 861 | encap = a[OVS_KEY_ATTR_ENCAP]; |
| 862 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); |
| 863 | encap_valid = true; |
| 864 | |
| 865 | if (tci & htons(VLAN_TAG_PRESENT)) { |
| 866 | err = parse_flow_nlattrs(encap, a, &key_attrs); |
| 867 | if (err) |
| 868 | return err; |
| 869 | } else if (!tci) { |
| 870 | /* Corner case for truncated 802.1Q header. */ |
| 871 | if (nla_len(encap)) { |
| 872 | OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n"); |
| 873 | return -EINVAL; |
| 874 | } |
| 875 | } else { |
| 876 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); |
| 877 | return -EINVAL; |
| 878 | } |
| 879 | } |
| 880 | |
Jarno Rajahalme | 23dabf8 | 2014-03-27 12:35:23 -0700 | [diff] [blame] | 881 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 882 | if (err) |
| 883 | return err; |
| 884 | |
| 885 | if (mask) { |
| 886 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); |
| 887 | if (err) |
| 888 | return err; |
| 889 | |
| 890 | if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) { |
| 891 | __be16 eth_type = 0; |
| 892 | __be16 tci = 0; |
| 893 | |
| 894 | if (!encap_valid) { |
| 895 | OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n"); |
| 896 | return -EINVAL; |
| 897 | } |
| 898 | |
| 899 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); |
| 900 | if (a[OVS_KEY_ATTR_ETHERTYPE]) |
| 901 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
| 902 | |
| 903 | if (eth_type == htons(0xffff)) { |
| 904 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); |
| 905 | encap = a[OVS_KEY_ATTR_ENCAP]; |
| 906 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); |
| 907 | } else { |
| 908 | OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n", |
| 909 | ntohs(eth_type)); |
| 910 | return -EINVAL; |
| 911 | } |
| 912 | |
| 913 | if (a[OVS_KEY_ATTR_VLAN]) |
| 914 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
| 915 | |
| 916 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
| 917 | OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci)); |
| 918 | return -EINVAL; |
| 919 | } |
| 920 | } |
| 921 | |
Jarno Rajahalme | 23dabf8 | 2014-03-27 12:35:23 -0700 | [diff] [blame] | 922 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 923 | if (err) |
| 924 | return err; |
| 925 | } else { |
| 926 | /* Populate exact match flow's key mask. */ |
| 927 | if (match->mask) |
| 928 | sw_flow_mask_set(match->mask, &match->range, 0xff); |
| 929 | } |
| 930 | |
| 931 | if (!match_validate(match, key_attrs, mask_attrs)) |
| 932 | return -EINVAL; |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | /** |
| 938 | * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key. |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 939 | * @key: Receives extracted in_port, priority, tun_key and skb_mark. |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 940 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
| 941 | * sequence. |
| 942 | * |
| 943 | * This parses a series of Netlink attributes that form a flow key, which must |
| 944 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to |
| 945 | * get the metadata, that is, the parts of the flow key that cannot be |
| 946 | * extracted from the packet itself. |
| 947 | */ |
| 948 | |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 949 | int ovs_nla_get_flow_metadata(const struct nlattr *attr, |
| 950 | struct sw_flow_key *key) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 951 | { |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 952 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 953 | struct sw_flow_match match; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 954 | u64 attrs = 0; |
| 955 | int err; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 956 | |
| 957 | err = parse_flow_nlattrs(attr, a, &attrs); |
| 958 | if (err) |
| 959 | return -EINVAL; |
| 960 | |
| 961 | memset(&match, 0, sizeof(match)); |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 962 | match.key = key; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 963 | |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 964 | key->phy.in_port = DP_MAX_PORTS; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 965 | |
Pravin B Shelar | 83c8df2 | 2014-09-15 19:20:31 -0700 | [diff] [blame] | 966 | return metadata_from_nlattrs(&match, &attrs, a, false); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | int ovs_nla_put_flow(const struct sw_flow_key *swkey, |
| 970 | const struct sw_flow_key *output, struct sk_buff *skb) |
| 971 | { |
| 972 | struct ovs_key_ethernet *eth_key; |
| 973 | struct nlattr *nla, *encap; |
| 974 | bool is_mask = (swkey != output); |
| 975 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 976 | if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id)) |
| 977 | goto nla_put_failure; |
| 978 | |
| 979 | if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash)) |
| 980 | goto nla_put_failure; |
| 981 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 982 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
| 983 | goto nla_put_failure; |
| 984 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 985 | if ((swkey->tun_key.ipv4_dst || is_mask)) { |
| 986 | const struct geneve_opt *opts = NULL; |
| 987 | |
| 988 | if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT) |
| 989 | opts = GENEVE_OPTS(output, swkey->tun_opts_len); |
| 990 | |
| 991 | if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts, |
| 992 | swkey->tun_opts_len)) |
| 993 | goto nla_put_failure; |
| 994 | } |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 995 | |
| 996 | if (swkey->phy.in_port == DP_MAX_PORTS) { |
| 997 | if (is_mask && (output->phy.in_port == 0xffff)) |
| 998 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) |
| 999 | goto nla_put_failure; |
| 1000 | } else { |
| 1001 | u16 upper_u16; |
| 1002 | upper_u16 = !is_mask ? 0 : 0xffff; |
| 1003 | |
| 1004 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, |
| 1005 | (upper_u16 << 16) | output->phy.in_port)) |
| 1006 | goto nla_put_failure; |
| 1007 | } |
| 1008 | |
| 1009 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) |
| 1010 | goto nla_put_failure; |
| 1011 | |
| 1012 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
| 1013 | if (!nla) |
| 1014 | goto nla_put_failure; |
| 1015 | |
| 1016 | eth_key = nla_data(nla); |
Joe Perches | 8c63ff0 | 2014-02-18 11:15:45 -0800 | [diff] [blame] | 1017 | ether_addr_copy(eth_key->eth_src, output->eth.src); |
| 1018 | ether_addr_copy(eth_key->eth_dst, output->eth.dst); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1019 | |
| 1020 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { |
| 1021 | __be16 eth_type; |
| 1022 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); |
| 1023 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || |
| 1024 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) |
| 1025 | goto nla_put_failure; |
| 1026 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
| 1027 | if (!swkey->eth.tci) |
| 1028 | goto unencap; |
| 1029 | } else |
| 1030 | encap = NULL; |
| 1031 | |
| 1032 | if (swkey->eth.type == htons(ETH_P_802_2)) { |
| 1033 | /* |
| 1034 | * Ethertype 802.2 is represented in the netlink with omitted |
| 1035 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and |
| 1036 | * 0xffff in the mask attribute. Ethertype can also |
| 1037 | * be wildcarded. |
| 1038 | */ |
| 1039 | if (is_mask && output->eth.type) |
| 1040 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, |
| 1041 | output->eth.type)) |
| 1042 | goto nla_put_failure; |
| 1043 | goto unencap; |
| 1044 | } |
| 1045 | |
| 1046 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) |
| 1047 | goto nla_put_failure; |
| 1048 | |
| 1049 | if (swkey->eth.type == htons(ETH_P_IP)) { |
| 1050 | struct ovs_key_ipv4 *ipv4_key; |
| 1051 | |
| 1052 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
| 1053 | if (!nla) |
| 1054 | goto nla_put_failure; |
| 1055 | ipv4_key = nla_data(nla); |
| 1056 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
| 1057 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; |
| 1058 | ipv4_key->ipv4_proto = output->ip.proto; |
| 1059 | ipv4_key->ipv4_tos = output->ip.tos; |
| 1060 | ipv4_key->ipv4_ttl = output->ip.ttl; |
| 1061 | ipv4_key->ipv4_frag = output->ip.frag; |
| 1062 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
| 1063 | struct ovs_key_ipv6 *ipv6_key; |
| 1064 | |
| 1065 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
| 1066 | if (!nla) |
| 1067 | goto nla_put_failure; |
| 1068 | ipv6_key = nla_data(nla); |
| 1069 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
| 1070 | sizeof(ipv6_key->ipv6_src)); |
| 1071 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
| 1072 | sizeof(ipv6_key->ipv6_dst)); |
| 1073 | ipv6_key->ipv6_label = output->ipv6.label; |
| 1074 | ipv6_key->ipv6_proto = output->ip.proto; |
| 1075 | ipv6_key->ipv6_tclass = output->ip.tos; |
| 1076 | ipv6_key->ipv6_hlimit = output->ip.ttl; |
| 1077 | ipv6_key->ipv6_frag = output->ip.frag; |
| 1078 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
| 1079 | swkey->eth.type == htons(ETH_P_RARP)) { |
| 1080 | struct ovs_key_arp *arp_key; |
| 1081 | |
| 1082 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
| 1083 | if (!nla) |
| 1084 | goto nla_put_failure; |
| 1085 | arp_key = nla_data(nla); |
| 1086 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
| 1087 | arp_key->arp_sip = output->ipv4.addr.src; |
| 1088 | arp_key->arp_tip = output->ipv4.addr.dst; |
| 1089 | arp_key->arp_op = htons(output->ip.proto); |
Joe Perches | 8c63ff0 | 2014-02-18 11:15:45 -0800 | [diff] [blame] | 1090 | ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha); |
| 1091 | ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
| 1094 | if ((swkey->eth.type == htons(ETH_P_IP) || |
| 1095 | swkey->eth.type == htons(ETH_P_IPV6)) && |
| 1096 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { |
| 1097 | |
| 1098 | if (swkey->ip.proto == IPPROTO_TCP) { |
| 1099 | struct ovs_key_tcp *tcp_key; |
| 1100 | |
| 1101 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
| 1102 | if (!nla) |
| 1103 | goto nla_put_failure; |
| 1104 | tcp_key = nla_data(nla); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1105 | tcp_key->tcp_src = output->tp.src; |
| 1106 | tcp_key->tcp_dst = output->tp.dst; |
| 1107 | if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS, |
| 1108 | output->tp.flags)) |
| 1109 | goto nla_put_failure; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1110 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
| 1111 | struct ovs_key_udp *udp_key; |
| 1112 | |
| 1113 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
| 1114 | if (!nla) |
| 1115 | goto nla_put_failure; |
| 1116 | udp_key = nla_data(nla); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1117 | udp_key->udp_src = output->tp.src; |
| 1118 | udp_key->udp_dst = output->tp.dst; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1119 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
| 1120 | struct ovs_key_sctp *sctp_key; |
| 1121 | |
| 1122 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); |
| 1123 | if (!nla) |
| 1124 | goto nla_put_failure; |
| 1125 | sctp_key = nla_data(nla); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1126 | sctp_key->sctp_src = output->tp.src; |
| 1127 | sctp_key->sctp_dst = output->tp.dst; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1128 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
| 1129 | swkey->ip.proto == IPPROTO_ICMP) { |
| 1130 | struct ovs_key_icmp *icmp_key; |
| 1131 | |
| 1132 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
| 1133 | if (!nla) |
| 1134 | goto nla_put_failure; |
| 1135 | icmp_key = nla_data(nla); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1136 | icmp_key->icmp_type = ntohs(output->tp.src); |
| 1137 | icmp_key->icmp_code = ntohs(output->tp.dst); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1138 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
| 1139 | swkey->ip.proto == IPPROTO_ICMPV6) { |
| 1140 | struct ovs_key_icmpv6 *icmpv6_key; |
| 1141 | |
| 1142 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
| 1143 | sizeof(*icmpv6_key)); |
| 1144 | if (!nla) |
| 1145 | goto nla_put_failure; |
| 1146 | icmpv6_key = nla_data(nla); |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1147 | icmpv6_key->icmpv6_type = ntohs(output->tp.src); |
| 1148 | icmpv6_key->icmpv6_code = ntohs(output->tp.dst); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1149 | |
| 1150 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
| 1151 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { |
| 1152 | struct ovs_key_nd *nd_key; |
| 1153 | |
| 1154 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
| 1155 | if (!nla) |
| 1156 | goto nla_put_failure; |
| 1157 | nd_key = nla_data(nla); |
| 1158 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
| 1159 | sizeof(nd_key->nd_target)); |
Joe Perches | 8c63ff0 | 2014-02-18 11:15:45 -0800 | [diff] [blame] | 1160 | ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll); |
| 1161 | ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1162 | } |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | unencap: |
| 1167 | if (encap) |
| 1168 | nla_nest_end(skb, encap); |
| 1169 | |
| 1170 | return 0; |
| 1171 | |
| 1172 | nla_put_failure: |
| 1173 | return -EMSGSIZE; |
| 1174 | } |
| 1175 | |
| 1176 | #define MAX_ACTIONS_BUFSIZE (32 * 1024) |
| 1177 | |
| 1178 | struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size) |
| 1179 | { |
| 1180 | struct sw_flow_actions *sfa; |
| 1181 | |
| 1182 | if (size > MAX_ACTIONS_BUFSIZE) |
| 1183 | return ERR_PTR(-EINVAL); |
| 1184 | |
| 1185 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
| 1186 | if (!sfa) |
| 1187 | return ERR_PTR(-ENOMEM); |
| 1188 | |
| 1189 | sfa->actions_len = 0; |
| 1190 | return sfa; |
| 1191 | } |
| 1192 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1193 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
| 1194 | * The caller must hold rcu_read_lock for this to be sensible. */ |
| 1195 | void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts) |
| 1196 | { |
Daniel Borkmann | 11d6c461 | 2013-12-10 12:02:03 +0100 | [diff] [blame] | 1197 | kfree_rcu(sf_acts, rcu); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
| 1200 | static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, |
| 1201 | int attr_len) |
| 1202 | { |
| 1203 | |
| 1204 | struct sw_flow_actions *acts; |
| 1205 | int new_acts_size; |
| 1206 | int req_size = NLA_ALIGN(attr_len); |
| 1207 | int next_offset = offsetof(struct sw_flow_actions, actions) + |
| 1208 | (*sfa)->actions_len; |
| 1209 | |
| 1210 | if (req_size <= (ksize(*sfa) - next_offset)) |
| 1211 | goto out; |
| 1212 | |
| 1213 | new_acts_size = ksize(*sfa) * 2; |
| 1214 | |
| 1215 | if (new_acts_size > MAX_ACTIONS_BUFSIZE) { |
| 1216 | if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) |
| 1217 | return ERR_PTR(-EMSGSIZE); |
| 1218 | new_acts_size = MAX_ACTIONS_BUFSIZE; |
| 1219 | } |
| 1220 | |
| 1221 | acts = ovs_nla_alloc_flow_actions(new_acts_size); |
| 1222 | if (IS_ERR(acts)) |
| 1223 | return (void *)acts; |
| 1224 | |
| 1225 | memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); |
| 1226 | acts->actions_len = (*sfa)->actions_len; |
| 1227 | kfree(*sfa); |
| 1228 | *sfa = acts; |
| 1229 | |
| 1230 | out: |
| 1231 | (*sfa)->actions_len += req_size; |
| 1232 | return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset); |
| 1233 | } |
| 1234 | |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1235 | static struct nlattr *__add_action(struct sw_flow_actions **sfa, |
| 1236 | int attrtype, void *data, int len) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1237 | { |
| 1238 | struct nlattr *a; |
| 1239 | |
| 1240 | a = reserve_sfa_size(sfa, nla_attr_size(len)); |
| 1241 | if (IS_ERR(a)) |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1242 | return a; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1243 | |
| 1244 | a->nla_type = attrtype; |
| 1245 | a->nla_len = nla_attr_size(len); |
| 1246 | |
| 1247 | if (data) |
| 1248 | memcpy(nla_data(a), data, len); |
| 1249 | memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len)); |
| 1250 | |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1251 | return a; |
| 1252 | } |
| 1253 | |
| 1254 | static int add_action(struct sw_flow_actions **sfa, int attrtype, |
| 1255 | void *data, int len) |
| 1256 | { |
| 1257 | struct nlattr *a; |
| 1258 | |
| 1259 | a = __add_action(sfa, attrtype, data, len); |
| 1260 | if (IS_ERR(a)) |
| 1261 | return PTR_ERR(a); |
| 1262 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1263 | return 0; |
| 1264 | } |
| 1265 | |
| 1266 | static inline int add_nested_action_start(struct sw_flow_actions **sfa, |
| 1267 | int attrtype) |
| 1268 | { |
| 1269 | int used = (*sfa)->actions_len; |
| 1270 | int err; |
| 1271 | |
| 1272 | err = add_action(sfa, attrtype, NULL, 0); |
| 1273 | if (err) |
| 1274 | return err; |
| 1275 | |
| 1276 | return used; |
| 1277 | } |
| 1278 | |
| 1279 | static inline void add_nested_action_end(struct sw_flow_actions *sfa, |
| 1280 | int st_offset) |
| 1281 | { |
| 1282 | struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + |
| 1283 | st_offset); |
| 1284 | |
| 1285 | a->nla_len = sfa->actions_len - st_offset; |
| 1286 | } |
| 1287 | |
| 1288 | static int validate_and_copy_sample(const struct nlattr *attr, |
| 1289 | const struct sw_flow_key *key, int depth, |
| 1290 | struct sw_flow_actions **sfa) |
| 1291 | { |
| 1292 | const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1]; |
| 1293 | const struct nlattr *probability, *actions; |
| 1294 | const struct nlattr *a; |
| 1295 | int rem, start, err, st_acts; |
| 1296 | |
| 1297 | memset(attrs, 0, sizeof(attrs)); |
| 1298 | nla_for_each_nested(a, attr, rem) { |
| 1299 | int type = nla_type(a); |
| 1300 | if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type]) |
| 1301 | return -EINVAL; |
| 1302 | attrs[type] = a; |
| 1303 | } |
| 1304 | if (rem) |
| 1305 | return -EINVAL; |
| 1306 | |
| 1307 | probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY]; |
| 1308 | if (!probability || nla_len(probability) != sizeof(u32)) |
| 1309 | return -EINVAL; |
| 1310 | |
| 1311 | actions = attrs[OVS_SAMPLE_ATTR_ACTIONS]; |
| 1312 | if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) |
| 1313 | return -EINVAL; |
| 1314 | |
| 1315 | /* validation done, copy sample action. */ |
| 1316 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE); |
| 1317 | if (start < 0) |
| 1318 | return start; |
| 1319 | err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, |
| 1320 | nla_data(probability), sizeof(u32)); |
| 1321 | if (err) |
| 1322 | return err; |
| 1323 | st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS); |
| 1324 | if (st_acts < 0) |
| 1325 | return st_acts; |
| 1326 | |
| 1327 | err = ovs_nla_copy_actions(actions, key, depth + 1, sfa); |
| 1328 | if (err) |
| 1329 | return err; |
| 1330 | |
| 1331 | add_nested_action_end(*sfa, st_acts); |
| 1332 | add_nested_action_end(*sfa, start); |
| 1333 | |
| 1334 | return 0; |
| 1335 | } |
| 1336 | |
| 1337 | static int validate_tp_port(const struct sw_flow_key *flow_key) |
| 1338 | { |
Jarno Rajahalme | 1139e24 | 2014-05-05 09:54:49 -0700 | [diff] [blame] | 1339 | if ((flow_key->eth.type == htons(ETH_P_IP) || |
| 1340 | flow_key->eth.type == htons(ETH_P_IPV6)) && |
| 1341 | (flow_key->tp.src || flow_key->tp.dst)) |
| 1342 | return 0; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1343 | |
| 1344 | return -EINVAL; |
| 1345 | } |
| 1346 | |
| 1347 | void ovs_match_init(struct sw_flow_match *match, |
| 1348 | struct sw_flow_key *key, |
| 1349 | struct sw_flow_mask *mask) |
| 1350 | { |
| 1351 | memset(match, 0, sizeof(*match)); |
| 1352 | match->key = key; |
| 1353 | match->mask = mask; |
| 1354 | |
| 1355 | memset(key, 0, sizeof(*key)); |
| 1356 | |
| 1357 | if (mask) { |
| 1358 | memset(&mask->key, 0, sizeof(mask->key)); |
| 1359 | mask->range.start = mask->range.end = 0; |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | static int validate_and_copy_set_tun(const struct nlattr *attr, |
| 1364 | struct sw_flow_actions **sfa) |
| 1365 | { |
| 1366 | struct sw_flow_match match; |
| 1367 | struct sw_flow_key key; |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1368 | struct ovs_tunnel_info *tun_info; |
| 1369 | struct nlattr *a; |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1370 | int err, start; |
| 1371 | |
| 1372 | ovs_match_init(&match, &key, NULL); |
| 1373 | err = ipv4_tun_from_nlattr(nla_data(attr), &match, false); |
| 1374 | if (err) |
| 1375 | return err; |
| 1376 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 1377 | if (key.tun_opts_len) { |
| 1378 | struct geneve_opt *option = GENEVE_OPTS(&key, |
| 1379 | key.tun_opts_len); |
| 1380 | int opts_len = key.tun_opts_len; |
| 1381 | bool crit_opt = false; |
| 1382 | |
| 1383 | while (opts_len > 0) { |
| 1384 | int len; |
| 1385 | |
| 1386 | if (opts_len < sizeof(*option)) |
| 1387 | return -EINVAL; |
| 1388 | |
| 1389 | len = sizeof(*option) + option->length * 4; |
| 1390 | if (len > opts_len) |
| 1391 | return -EINVAL; |
| 1392 | |
| 1393 | crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE); |
| 1394 | |
| 1395 | option = (struct geneve_opt *)((u8 *)option + len); |
| 1396 | opts_len -= len; |
| 1397 | }; |
| 1398 | |
| 1399 | key.tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0; |
| 1400 | }; |
| 1401 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1402 | start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET); |
| 1403 | if (start < 0) |
| 1404 | return start; |
| 1405 | |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1406 | a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL, |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 1407 | sizeof(*tun_info) + key.tun_opts_len); |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1408 | if (IS_ERR(a)) |
| 1409 | return PTR_ERR(a); |
| 1410 | |
| 1411 | tun_info = nla_data(a); |
| 1412 | tun_info->tunnel = key.tun_key; |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 1413 | tun_info->options_len = key.tun_opts_len; |
| 1414 | |
| 1415 | if (tun_info->options_len) { |
| 1416 | /* We need to store the options in the action itself since |
| 1417 | * everything else will go away after flow setup. We can append |
| 1418 | * it to tun_info and then point there. |
| 1419 | */ |
| 1420 | memcpy((tun_info + 1), GENEVE_OPTS(&key, key.tun_opts_len), |
| 1421 | key.tun_opts_len); |
| 1422 | tun_info->options = (struct geneve_opt *)(tun_info + 1); |
| 1423 | } else { |
| 1424 | tun_info->options = NULL; |
| 1425 | } |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1426 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1427 | add_nested_action_end(*sfa, start); |
| 1428 | |
| 1429 | return err; |
| 1430 | } |
| 1431 | |
| 1432 | static int validate_set(const struct nlattr *a, |
| 1433 | const struct sw_flow_key *flow_key, |
| 1434 | struct sw_flow_actions **sfa, |
| 1435 | bool *set_tun) |
| 1436 | { |
| 1437 | const struct nlattr *ovs_key = nla_data(a); |
| 1438 | int key_type = nla_type(ovs_key); |
| 1439 | |
| 1440 | /* There can be only one key in a action */ |
| 1441 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) |
| 1442 | return -EINVAL; |
| 1443 | |
| 1444 | if (key_type > OVS_KEY_ATTR_MAX || |
| 1445 | (ovs_key_lens[key_type] != nla_len(ovs_key) && |
| 1446 | ovs_key_lens[key_type] != -1)) |
| 1447 | return -EINVAL; |
| 1448 | |
| 1449 | switch (key_type) { |
| 1450 | const struct ovs_key_ipv4 *ipv4_key; |
| 1451 | const struct ovs_key_ipv6 *ipv6_key; |
| 1452 | int err; |
| 1453 | |
| 1454 | case OVS_KEY_ATTR_PRIORITY: |
| 1455 | case OVS_KEY_ATTR_SKB_MARK: |
| 1456 | case OVS_KEY_ATTR_ETHERNET: |
| 1457 | break; |
| 1458 | |
| 1459 | case OVS_KEY_ATTR_TUNNEL: |
| 1460 | *set_tun = true; |
| 1461 | err = validate_and_copy_set_tun(a, sfa); |
| 1462 | if (err) |
| 1463 | return err; |
| 1464 | break; |
| 1465 | |
| 1466 | case OVS_KEY_ATTR_IPV4: |
| 1467 | if (flow_key->eth.type != htons(ETH_P_IP)) |
| 1468 | return -EINVAL; |
| 1469 | |
| 1470 | if (!flow_key->ip.proto) |
| 1471 | return -EINVAL; |
| 1472 | |
| 1473 | ipv4_key = nla_data(ovs_key); |
| 1474 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) |
| 1475 | return -EINVAL; |
| 1476 | |
| 1477 | if (ipv4_key->ipv4_frag != flow_key->ip.frag) |
| 1478 | return -EINVAL; |
| 1479 | |
| 1480 | break; |
| 1481 | |
| 1482 | case OVS_KEY_ATTR_IPV6: |
| 1483 | if (flow_key->eth.type != htons(ETH_P_IPV6)) |
| 1484 | return -EINVAL; |
| 1485 | |
| 1486 | if (!flow_key->ip.proto) |
| 1487 | return -EINVAL; |
| 1488 | |
| 1489 | ipv6_key = nla_data(ovs_key); |
| 1490 | if (ipv6_key->ipv6_proto != flow_key->ip.proto) |
| 1491 | return -EINVAL; |
| 1492 | |
| 1493 | if (ipv6_key->ipv6_frag != flow_key->ip.frag) |
| 1494 | return -EINVAL; |
| 1495 | |
| 1496 | if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000) |
| 1497 | return -EINVAL; |
| 1498 | |
| 1499 | break; |
| 1500 | |
| 1501 | case OVS_KEY_ATTR_TCP: |
| 1502 | if (flow_key->ip.proto != IPPROTO_TCP) |
| 1503 | return -EINVAL; |
| 1504 | |
| 1505 | return validate_tp_port(flow_key); |
| 1506 | |
| 1507 | case OVS_KEY_ATTR_UDP: |
| 1508 | if (flow_key->ip.proto != IPPROTO_UDP) |
| 1509 | return -EINVAL; |
| 1510 | |
| 1511 | return validate_tp_port(flow_key); |
| 1512 | |
| 1513 | case OVS_KEY_ATTR_SCTP: |
| 1514 | if (flow_key->ip.proto != IPPROTO_SCTP) |
| 1515 | return -EINVAL; |
| 1516 | |
| 1517 | return validate_tp_port(flow_key); |
| 1518 | |
| 1519 | default: |
| 1520 | return -EINVAL; |
| 1521 | } |
| 1522 | |
| 1523 | return 0; |
| 1524 | } |
| 1525 | |
| 1526 | static int validate_userspace(const struct nlattr *attr) |
| 1527 | { |
| 1528 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = { |
| 1529 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, |
| 1530 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC }, |
| 1531 | }; |
| 1532 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; |
| 1533 | int error; |
| 1534 | |
| 1535 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, |
| 1536 | attr, userspace_policy); |
| 1537 | if (error) |
| 1538 | return error; |
| 1539 | |
| 1540 | if (!a[OVS_USERSPACE_ATTR_PID] || |
| 1541 | !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) |
| 1542 | return -EINVAL; |
| 1543 | |
| 1544 | return 0; |
| 1545 | } |
| 1546 | |
| 1547 | static int copy_action(const struct nlattr *from, |
| 1548 | struct sw_flow_actions **sfa) |
| 1549 | { |
| 1550 | int totlen = NLA_ALIGN(from->nla_len); |
| 1551 | struct nlattr *to; |
| 1552 | |
| 1553 | to = reserve_sfa_size(sfa, from->nla_len); |
| 1554 | if (IS_ERR(to)) |
| 1555 | return PTR_ERR(to); |
| 1556 | |
| 1557 | memcpy(to, from, totlen); |
| 1558 | return 0; |
| 1559 | } |
| 1560 | |
| 1561 | int ovs_nla_copy_actions(const struct nlattr *attr, |
| 1562 | const struct sw_flow_key *key, |
| 1563 | int depth, |
| 1564 | struct sw_flow_actions **sfa) |
| 1565 | { |
| 1566 | const struct nlattr *a; |
| 1567 | int rem, err; |
| 1568 | |
| 1569 | if (depth >= SAMPLE_ACTION_DEPTH) |
| 1570 | return -EOVERFLOW; |
| 1571 | |
| 1572 | nla_for_each_nested(a, attr, rem) { |
| 1573 | /* Expected argument lengths, (u32)-1 for variable length. */ |
| 1574 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
| 1575 | [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32), |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1576 | [OVS_ACTION_ATTR_RECIRC] = sizeof(u32), |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1577 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
| 1578 | [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan), |
| 1579 | [OVS_ACTION_ATTR_POP_VLAN] = 0, |
| 1580 | [OVS_ACTION_ATTR_SET] = (u32)-1, |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1581 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1, |
| 1582 | [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash) |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1583 | }; |
| 1584 | const struct ovs_action_push_vlan *vlan; |
| 1585 | int type = nla_type(a); |
| 1586 | bool skip_copy; |
| 1587 | |
| 1588 | if (type > OVS_ACTION_ATTR_MAX || |
| 1589 | (action_lens[type] != nla_len(a) && |
| 1590 | action_lens[type] != (u32)-1)) |
| 1591 | return -EINVAL; |
| 1592 | |
| 1593 | skip_copy = false; |
| 1594 | switch (type) { |
| 1595 | case OVS_ACTION_ATTR_UNSPEC: |
| 1596 | return -EINVAL; |
| 1597 | |
| 1598 | case OVS_ACTION_ATTR_USERSPACE: |
| 1599 | err = validate_userspace(a); |
| 1600 | if (err) |
| 1601 | return err; |
| 1602 | break; |
| 1603 | |
| 1604 | case OVS_ACTION_ATTR_OUTPUT: |
| 1605 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
| 1606 | return -EINVAL; |
| 1607 | break; |
| 1608 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1609 | case OVS_ACTION_ATTR_HASH: { |
| 1610 | const struct ovs_action_hash *act_hash = nla_data(a); |
| 1611 | |
| 1612 | switch (act_hash->hash_alg) { |
| 1613 | case OVS_HASH_ALG_L4: |
| 1614 | break; |
| 1615 | default: |
| 1616 | return -EINVAL; |
| 1617 | } |
| 1618 | |
| 1619 | break; |
| 1620 | } |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1621 | |
| 1622 | case OVS_ACTION_ATTR_POP_VLAN: |
| 1623 | break; |
| 1624 | |
| 1625 | case OVS_ACTION_ATTR_PUSH_VLAN: |
| 1626 | vlan = nla_data(a); |
| 1627 | if (vlan->vlan_tpid != htons(ETH_P_8021Q)) |
| 1628 | return -EINVAL; |
| 1629 | if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT))) |
| 1630 | return -EINVAL; |
| 1631 | break; |
| 1632 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1633 | case OVS_ACTION_ATTR_RECIRC: |
| 1634 | break; |
| 1635 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1636 | case OVS_ACTION_ATTR_SET: |
| 1637 | err = validate_set(a, key, sfa, &skip_copy); |
| 1638 | if (err) |
| 1639 | return err; |
| 1640 | break; |
| 1641 | |
| 1642 | case OVS_ACTION_ATTR_SAMPLE: |
| 1643 | err = validate_and_copy_sample(a, key, depth, sfa); |
| 1644 | if (err) |
| 1645 | return err; |
| 1646 | skip_copy = true; |
| 1647 | break; |
| 1648 | |
| 1649 | default: |
| 1650 | return -EINVAL; |
| 1651 | } |
| 1652 | if (!skip_copy) { |
| 1653 | err = copy_action(a, sfa); |
| 1654 | if (err) |
| 1655 | return err; |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | if (rem > 0) |
| 1660 | return -EINVAL; |
| 1661 | |
| 1662 | return 0; |
| 1663 | } |
| 1664 | |
| 1665 | static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb) |
| 1666 | { |
| 1667 | const struct nlattr *a; |
| 1668 | struct nlattr *start; |
| 1669 | int err = 0, rem; |
| 1670 | |
| 1671 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE); |
| 1672 | if (!start) |
| 1673 | return -EMSGSIZE; |
| 1674 | |
| 1675 | nla_for_each_nested(a, attr, rem) { |
| 1676 | int type = nla_type(a); |
| 1677 | struct nlattr *st_sample; |
| 1678 | |
| 1679 | switch (type) { |
| 1680 | case OVS_SAMPLE_ATTR_PROBABILITY: |
| 1681 | if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, |
| 1682 | sizeof(u32), nla_data(a))) |
| 1683 | return -EMSGSIZE; |
| 1684 | break; |
| 1685 | case OVS_SAMPLE_ATTR_ACTIONS: |
| 1686 | st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS); |
| 1687 | if (!st_sample) |
| 1688 | return -EMSGSIZE; |
| 1689 | err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb); |
| 1690 | if (err) |
| 1691 | return err; |
| 1692 | nla_nest_end(skb, st_sample); |
| 1693 | break; |
| 1694 | } |
| 1695 | } |
| 1696 | |
| 1697 | nla_nest_end(skb, start); |
| 1698 | return err; |
| 1699 | } |
| 1700 | |
| 1701 | static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb) |
| 1702 | { |
| 1703 | const struct nlattr *ovs_key = nla_data(a); |
| 1704 | int key_type = nla_type(ovs_key); |
| 1705 | struct nlattr *start; |
| 1706 | int err; |
| 1707 | |
| 1708 | switch (key_type) { |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1709 | case OVS_KEY_ATTR_TUNNEL_INFO: { |
| 1710 | struct ovs_tunnel_info *tun_info = nla_data(ovs_key); |
| 1711 | |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1712 | start = nla_nest_start(skb, OVS_ACTION_ATTR_SET); |
| 1713 | if (!start) |
| 1714 | return -EMSGSIZE; |
| 1715 | |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1716 | err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel, |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame^] | 1717 | tun_info->options_len ? |
| 1718 | tun_info->options : NULL, |
| 1719 | tun_info->options_len); |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1720 | if (err) |
| 1721 | return err; |
| 1722 | nla_nest_end(skb, start); |
| 1723 | break; |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 1724 | } |
Pravin B Shelar | e644571 | 2013-10-03 18:16:47 -0700 | [diff] [blame] | 1725 | default: |
| 1726 | if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key)) |
| 1727 | return -EMSGSIZE; |
| 1728 | break; |
| 1729 | } |
| 1730 | |
| 1731 | return 0; |
| 1732 | } |
| 1733 | |
| 1734 | int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb) |
| 1735 | { |
| 1736 | const struct nlattr *a; |
| 1737 | int rem, err; |
| 1738 | |
| 1739 | nla_for_each_attr(a, attr, len, rem) { |
| 1740 | int type = nla_type(a); |
| 1741 | |
| 1742 | switch (type) { |
| 1743 | case OVS_ACTION_ATTR_SET: |
| 1744 | err = set_action_to_attr(a, skb); |
| 1745 | if (err) |
| 1746 | return err; |
| 1747 | break; |
| 1748 | |
| 1749 | case OVS_ACTION_ATTR_SAMPLE: |
| 1750 | err = sample_action_to_attr(a, skb); |
| 1751 | if (err) |
| 1752 | return err; |
| 1753 | break; |
| 1754 | default: |
| 1755 | if (nla_put(skb, type, nla_len(a), nla_data(a))) |
| 1756 | return -EMSGSIZE; |
| 1757 | break; |
| 1758 | } |
| 1759 | } |
| 1760 | |
| 1761 | return 0; |
| 1762 | } |