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064af421 | 1 | /* |
b02475c5 | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 BP |
15 | */ |
16 | #ifndef FLOW_H | |
17 | #define FLOW_H 1 | |
18 | ||
7f3adc00 | 19 | #include <sys/types.h> |
064af421 BP |
20 | #include <netinet/in.h> |
21 | #include <stdbool.h> | |
22 | #include <stdint.h> | |
23 | #include <string.h> | |
c906cedf | 24 | #include "byte-order.h" |
659586ef | 25 | #include "openflow/nicira-ext.h" |
064af421 BP |
26 | #include "openflow/openflow.h" |
27 | #include "hash.h" | |
064af421 BP |
28 | #include "util.h" |
29 | ||
c97fb132 | 30 | struct dpif_flow_stats; |
064af421 | 31 | struct ds; |
b63f2ea7 | 32 | struct flow_wildcards; |
5cb7a798 | 33 | struct minimask; |
064af421 BP |
34 | struct ofpbuf; |
35 | ||
a877206f EJ |
36 | /* This sequence number should be incremented whenever anything involving flows |
37 | * or the wildcarding of flows changes. This will cause build assertion | |
38 | * failures in places which likely need to be updated. */ | |
476f36e8 | 39 | #define FLOW_WC_SEQ 23 |
a877206f | 40 | |
e9358af6 | 41 | #define FLOW_N_REGS 8 |
b6c9e612 BP |
42 | BUILD_ASSERT_DECL(FLOW_N_REGS <= NXM_NX_MAX_REGS); |
43 | ||
36956a7d BP |
44 | /* Used for struct flow's dl_type member for frames that have no Ethernet |
45 | * type, that is, pure 802.2 frames. */ | |
46 | #define FLOW_DL_TYPE_NONE 0x5ff | |
47 | ||
7257b535 | 48 | /* Fragment bits, used for IPv4 and IPv6, always zero for non-IP flows. */ |
eadef313 JP |
49 | #define FLOW_NW_FRAG_ANY (1 << 0) /* Set for any IP frag. */ |
50 | #define FLOW_NW_FRAG_LATER (1 << 1) /* Set for IP frag with nonzero offset. */ | |
51 | #define FLOW_NW_FRAG_MASK (FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER) | |
7257b535 | 52 | |
eadef313 JP |
53 | BUILD_ASSERT_DECL(FLOW_NW_FRAG_ANY == NX_IP_FRAG_ANY); |
54 | BUILD_ASSERT_DECL(FLOW_NW_FRAG_LATER == NX_IP_FRAG_LATER); | |
7257b535 | 55 | |
296e07ac JG |
56 | #define FLOW_TNL_F_DONT_FRAGMENT (1 << 0) |
57 | #define FLOW_TNL_F_CSUM (1 << 1) | |
58 | #define FLOW_TNL_F_KEY (1 << 2) | |
4fe3445a PS |
59 | |
60 | const char *flow_tun_flag_to_string(uint32_t flags); | |
61 | ||
296e07ac JG |
62 | struct flow_tnl { |
63 | ovs_be64 tun_id; | |
64 | ovs_be32 ip_src; | |
65 | ovs_be32 ip_dst; | |
66 | uint16_t flags; | |
67 | uint8_t ip_tos; | |
68 | uint8_t ip_ttl; | |
69 | }; | |
70 | ||
4e022ec0 AW |
71 | /* Unfortunately, a "struct flow" sometimes has to handle OpenFlow port |
72 | * numbers and other times datapath (dpif) port numbers. This union allows | |
73 | * access to both. */ | |
74 | union flow_in_port { | |
75 | ofp_port_t ofp_port; | |
76 | odp_port_t odp_port; | |
77 | }; | |
78 | ||
ddbfda84 | 79 | /* |
94639963 JR |
80 | * A flow in the network. |
81 | * | |
82 | * Must be initialized to all zeros to make any compiler-induced padding | |
83 | * zeroed. Helps also in keeping unused fields (such as mutually exclusive | |
84 | * IPv4 and IPv6 addresses) zeroed out. | |
85 | * | |
86 | * The meaning of 'in_port' is context-dependent. In most cases, it is a | |
87 | * 16-bit OpenFlow 1.0 port number. In the software datapath interface (dpif) | |
88 | * layer and its implementations (e.g. dpif-linux, dpif-netdev), it is instead | |
89 | * a 32-bit datapath port number. | |
476f36e8 JR |
90 | * |
91 | * The fields are organized in four segments to facilitate staged lookup, where | |
92 | * lower layer fields are first used to determine if the later fields need to | |
93 | * be looked at. This enables better wildcarding for datapath flows. | |
94639963 | 94 | */ |
14608a15 | 95 | struct flow { |
476f36e8 | 96 | /* L1 */ |
296e07ac | 97 | struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */ |
969fc56c | 98 | ovs_be64 metadata; /* OpenFlow Metadata. */ |
476f36e8 JR |
99 | uint32_t regs[FLOW_N_REGS]; /* Registers. */ |
100 | uint32_t skb_priority; /* Packet priority for QoS. */ | |
101 | uint32_t pkt_mark; /* Packet mark. */ | |
102 | union flow_in_port in_port; /* Input port.*/ | |
103 | ||
104 | /* L2 */ | |
105 | uint8_t dl_src[6]; /* Ethernet source address. */ | |
106 | uint8_t dl_dst[6]; /* Ethernet destination address. */ | |
107 | ovs_be16 dl_type; /* Ethernet frame type. */ | |
108 | ovs_be16 vlan_tci; /* If 802.1Q, TCI | VLAN_CFI; otherwise 0. */ | |
109 | ||
110 | /* L3 */ | |
111 | ovs_be32 mpls_lse; /* MPLS label stack entry. */ | |
5145475f JP |
112 | struct in6_addr ipv6_src; /* IPv6 source address. */ |
113 | struct in6_addr ipv6_dst; /* IPv6 destination address. */ | |
114 | struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */ | |
476f36e8 | 115 | ovs_be32 ipv6_label; /* IPv6 flow label. */ |
d31f1109 JP |
116 | ovs_be32 nw_src; /* IPv4 source address. */ |
117 | ovs_be32 nw_dst; /* IPv4 destination address. */ | |
476f36e8 | 118 | uint8_t nw_frag; /* FLOW_FRAG_* flags. */ |
eadef313 | 119 | uint8_t nw_tos; /* IP ToS (including DSCP and ECN). */ |
476f36e8 JR |
120 | uint8_t nw_ttl; /* IP TTL/Hop Limit. */ |
121 | uint8_t nw_proto; /* IP protocol or low 8 bits of ARP opcode. */ | |
685a51a5 JP |
122 | uint8_t arp_sha[6]; /* ARP/ND source hardware address. */ |
123 | uint8_t arp_tha[6]; /* ARP/ND target hardware address. */ | |
476f36e8 JR |
124 | ovs_be16 tcp_flags; /* TCP flags. With L3 to avoid matching L4. */ |
125 | ovs_be16 pad; /* Padding. */ | |
126 | /* L4 */ | |
127 | ovs_be16 tp_src; /* TCP/UDP/SCTP source port. */ | |
128 | ovs_be16 tp_dst; /* TCP/UDP/SCTP destination port. | |
129 | * Keep last for the BUILD_ASSERT_DECL below */ | |
14608a15 | 130 | }; |
296e07ac | 131 | BUILD_ASSERT_DECL(sizeof(struct flow) % 4 == 0); |
16c6d0c3 | 132 | |
659c2346 BP |
133 | #define FLOW_U32S (sizeof(struct flow) / 4) |
134 | ||
16c6d0c3 | 135 | /* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */ |
476f36e8 JR |
136 | BUILD_ASSERT_DECL(offsetof(struct flow, tp_dst) + 2 |
137 | == sizeof(struct flow_tnl) + 156 | |
138 | && FLOW_WC_SEQ == 23); | |
139 | ||
140 | /* Incremental points at which flow classification may be performed in | |
141 | * segments. | |
142 | * This is located here since this is dependent on the structure of the | |
143 | * struct flow defined above: | |
144 | * Each offset must be on a distint, successive U32 boundary srtictly | |
145 | * within the struct flow. */ | |
146 | enum { | |
147 | FLOW_SEGMENT_1_ENDS_AT = offsetof(struct flow, dl_src), | |
148 | FLOW_SEGMENT_2_ENDS_AT = offsetof(struct flow, mpls_lse), | |
149 | FLOW_SEGMENT_3_ENDS_AT = offsetof(struct flow, tp_src), | |
150 | }; | |
151 | BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT % 4 == 0); | |
152 | BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT % 4 == 0); | |
153 | BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT % 4 == 0); | |
154 | BUILD_ASSERT_DECL( 0 < FLOW_SEGMENT_1_ENDS_AT); | |
155 | BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT < FLOW_SEGMENT_2_ENDS_AT); | |
156 | BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT < FLOW_SEGMENT_3_ENDS_AT); | |
157 | BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT < sizeof(struct flow)); | |
158 | ||
159 | extern const uint8_t flow_segment_u32s[]; | |
14608a15 | 160 | |
42edbe39 | 161 | /* Represents the metadata fields of struct flow. */ |
5d6c3af0 EJ |
162 | struct flow_metadata { |
163 | ovs_be64 tun_id; /* Encapsulating tunnel ID. */ | |
0ad90c84 JR |
164 | ovs_be32 tun_src; /* Tunnel outer IPv4 src addr */ |
165 | ovs_be32 tun_dst; /* Tunnel outer IPv4 dst addr */ | |
42edbe39 | 166 | ovs_be64 metadata; /* OpenFlow 1.1+ metadata field. */ |
5d6c3af0 | 167 | uint32_t regs[FLOW_N_REGS]; /* Registers. */ |
ac923e91 | 168 | uint32_t pkt_mark; /* Packet mark. */ |
4e022ec0 | 169 | ofp_port_t in_port; /* OpenFlow port or zero. */ |
5d6c3af0 EJ |
170 | }; |
171 | ||
72e8bf28 | 172 | void flow_extract(struct ofpbuf *, uint32_t priority, uint32_t mark, |
4e022ec0 AW |
173 | const struct flow_tnl *, const union flow_in_port *in_port, |
174 | struct flow *); | |
b02475c5 | 175 | |
993410fb | 176 | void flow_zero_wildcards(struct flow *, const struct flow_wildcards *); |
d8d9c698 | 177 | void flow_unwildcard_tp_ports(const struct flow *, struct flow_wildcards *); |
5d6c3af0 | 178 | void flow_get_metadata(const struct flow *, struct flow_metadata *); |
993410fb | 179 | |
ae412e7d | 180 | char *flow_to_string(const struct flow *); |
4fe3445a PS |
181 | void format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t), |
182 | uint32_t flags, char del); | |
61bf6666 JR |
183 | void format_flags_masked(struct ds *ds, const char *name, |
184 | const char *(*bit_to_string)(uint32_t), | |
185 | uint32_t flags, uint32_t mask); | |
4fe3445a | 186 | |
ae412e7d BP |
187 | void flow_format(struct ds *, const struct flow *); |
188 | void flow_print(FILE *, const struct flow *); | |
79049a24 | 189 | static inline int flow_compare_3way(const struct flow *, const struct flow *); |
ae412e7d BP |
190 | static inline bool flow_equal(const struct flow *, const struct flow *); |
191 | static inline size_t flow_hash(const struct flow *, uint32_t basis); | |
064af421 | 192 | |
fb0451d9 | 193 | void flow_set_dl_vlan(struct flow *, ovs_be16 vid); |
cc34bc8c | 194 | void flow_set_vlan_vid(struct flow *, ovs_be16 vid); |
3719455c BP |
195 | void flow_set_vlan_pcp(struct flow *, uint8_t pcp); |
196 | ||
b02475c5 SH |
197 | void flow_set_mpls_label(struct flow *flow, ovs_be32 label); |
198 | void flow_set_mpls_ttl(struct flow *flow, uint8_t ttl); | |
199 | void flow_set_mpls_tc(struct flow *flow, uint8_t tc); | |
200 | void flow_set_mpls_bos(struct flow *flow, uint8_t stack); | |
201 | ||
8b3b8dd1 BP |
202 | void flow_compose(struct ofpbuf *, const struct flow *); |
203 | ||
064af421 | 204 | static inline int |
79049a24 | 205 | flow_compare_3way(const struct flow *a, const struct flow *b) |
064af421 | 206 | { |
16c6d0c3 | 207 | return memcmp(a, b, sizeof *a); |
064af421 BP |
208 | } |
209 | ||
210 | static inline bool | |
ae412e7d | 211 | flow_equal(const struct flow *a, const struct flow *b) |
064af421 | 212 | { |
79049a24 | 213 | return !flow_compare_3way(a, b); |
064af421 BP |
214 | } |
215 | ||
216 | static inline size_t | |
ae412e7d | 217 | flow_hash(const struct flow *flow, uint32_t basis) |
064af421 | 218 | { |
16c6d0c3 | 219 | return hash_words((const uint32_t *) flow, sizeof *flow / 4, basis); |
064af421 | 220 | } |
5cb7a798 | 221 | |
4e022ec0 AW |
222 | static inline uint16_t |
223 | ofp_to_u16(ofp_port_t ofp_port) | |
224 | { | |
225 | return (OVS_FORCE uint16_t) ofp_port; | |
226 | } | |
227 | ||
228 | static inline uint32_t | |
229 | odp_to_u32(odp_port_t odp_port) | |
230 | { | |
231 | return (OVS_FORCE uint32_t) odp_port; | |
232 | } | |
233 | ||
234 | static inline uint32_t | |
235 | ofp11_to_u32(ofp11_port_t ofp11_port) | |
236 | { | |
237 | return (OVS_FORCE uint32_t) ofp11_port; | |
238 | } | |
239 | ||
240 | static inline ofp_port_t | |
241 | u16_to_ofp(uint16_t port) | |
242 | { | |
243 | return OFP_PORT_C(port); | |
244 | } | |
245 | ||
246 | static inline odp_port_t | |
247 | u32_to_odp(uint32_t port) | |
248 | { | |
249 | return ODP_PORT_C(port); | |
250 | } | |
251 | ||
252 | static inline ofp11_port_t | |
253 | u32_to_ofp11(uint32_t port) | |
254 | { | |
255 | return OFP11_PORT_C(port); | |
256 | } | |
257 | ||
f9c0c3ec EJ |
258 | static inline uint32_t |
259 | hash_ofp_port(ofp_port_t ofp_port) | |
260 | { | |
261 | return hash_int(ofp_to_u16(ofp_port), 0); | |
262 | } | |
263 | ||
264 | static inline uint32_t | |
265 | hash_odp_port(odp_port_t odp_port) | |
266 | { | |
267 | return hash_int(odp_to_u32(odp_port), 0); | |
268 | } | |
269 | ||
5cb7a798 BP |
270 | uint32_t flow_hash_in_minimask(const struct flow *, const struct minimask *, |
271 | uint32_t basis); | |
476f36e8 JR |
272 | uint32_t flow_hash_in_minimask_range(const struct flow *, |
273 | const struct minimask *, | |
274 | uint8_t start, uint8_t end, | |
275 | uint32_t *basis); | |
659c2346 | 276 | \f |
26720e24 BP |
277 | /* Wildcards for a flow. |
278 | * | |
279 | * A 1-bit in each bit in 'masks' indicates that the corresponding bit of | |
280 | * the flow is significant (must match). A 0-bit indicates that the | |
281 | * corresponding bit of the flow is wildcarded (need not match). */ | |
064af421 | 282 | struct flow_wildcards { |
26720e24 | 283 | struct flow masks; |
064af421 | 284 | }; |
a877206f | 285 | |
d8ae4d67 | 286 | void flow_wildcards_init_catchall(struct flow_wildcards *); |
494e43a5 | 287 | |
c11c6faa AZ |
288 | void flow_wildcards_clear_non_packet_fields(struct flow_wildcards *); |
289 | ||
ecf1e7ac | 290 | bool flow_wildcards_is_catchall(const struct flow_wildcards *); |
00561f41 | 291 | |
b6c9e612 BP |
292 | void flow_wildcards_set_reg_mask(struct flow_wildcards *, |
293 | int idx, uint32_t mask); | |
064af421 | 294 | |
368eefac EJ |
295 | void flow_wildcards_and(struct flow_wildcards *dst, |
296 | const struct flow_wildcards *src1, | |
297 | const struct flow_wildcards *src2); | |
298 | void flow_wildcards_or(struct flow_wildcards *dst, | |
299 | const struct flow_wildcards *src1, | |
300 | const struct flow_wildcards *src2); | |
b5d97350 BP |
301 | bool flow_wildcards_has_extra(const struct flow_wildcards *, |
302 | const struct flow_wildcards *); | |
303 | ||
ad77e3c5 EJ |
304 | void flow_wildcards_fold_minimask(struct flow_wildcards *, |
305 | const struct minimask *); | |
476f36e8 JR |
306 | void flow_wildcards_fold_minimask_range(struct flow_wildcards *, |
307 | const struct minimask *, | |
308 | uint8_t start, uint8_t end); | |
ad77e3c5 | 309 | |
1006cda6 | 310 | uint32_t flow_wildcards_hash(const struct flow_wildcards *, uint32_t basis); |
b5d97350 BP |
311 | bool flow_wildcards_equal(const struct flow_wildcards *, |
312 | const struct flow_wildcards *); | |
ff55ea1f | 313 | uint32_t flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis); |
b5d97350 | 314 | |
94639963 JR |
315 | /* Initialize a flow with random fields that matter for nx_hash_fields. */ |
316 | void flow_random_hash_fields(struct flow *); | |
6cdd5145 JP |
317 | void flow_mask_hash_fields(const struct flow *, struct flow_wildcards *, |
318 | enum nx_hash_fields); | |
520e9a2a EJ |
319 | uint32_t flow_hash_fields(const struct flow *, enum nx_hash_fields, |
320 | uint16_t basis); | |
321 | const char *flow_hash_fields_to_str(enum nx_hash_fields); | |
322 | bool flow_hash_fields_valid(enum nx_hash_fields); | |
db7f8281 | 323 | |
368eefac EJ |
324 | uint32_t flow_hash_in_wildcards(const struct flow *, |
325 | const struct flow_wildcards *, | |
326 | uint32_t basis); | |
327 | ||
659c2346 BP |
328 | bool flow_equal_except(const struct flow *a, const struct flow *b, |
329 | const struct flow_wildcards *); | |
5cb7a798 BP |
330 | \f |
331 | /* Compressed flow. */ | |
332 | ||
333 | #define MINI_N_INLINE (sizeof(void *) == 4 ? 7 : 8) | |
080e28d0 | 334 | BUILD_ASSERT_DECL(FLOW_U32S <= 64); |
5cb7a798 BP |
335 | |
336 | /* A sparse representation of a "struct flow". | |
337 | * | |
338 | * A "struct flow" is fairly large and tends to be mostly zeros. Sparse | |
339 | * representation has two advantages. First, it saves memory. Second, it | |
340 | * saves time when the goal is to iterate over only the nonzero parts of the | |
341 | * struct. | |
342 | * | |
343 | * The 'map' member holds one bit for each uint32_t in a "struct flow". Each | |
344 | * 0-bit indicates that the corresponding uint32_t is zero, each 1-bit that it | |
df40c152 | 345 | * *may* be nonzero. |
5cb7a798 BP |
346 | * |
347 | * 'values' points to the start of an array that has one element for each 1-bit | |
348 | * in 'map'. The least-numbered 1-bit is in values[0], the next 1-bit is in | |
349 | * values[1], and so on. | |
350 | * | |
351 | * 'values' may point to a few different locations: | |
352 | * | |
353 | * - If 'map' has MINI_N_INLINE or fewer 1-bits, it may point to | |
354 | * 'inline_values'. One hopes that this is the common case. | |
355 | * | |
356 | * - If 'map' has more than MINI_N_INLINE 1-bits, it may point to memory | |
357 | * allocated with malloc(). | |
358 | * | |
359 | * - The caller could provide storage on the stack for situations where | |
360 | * that makes sense. So far that's only proved useful for | |
361 | * minimask_combine(), but the principle works elsewhere. | |
362 | * | |
df40c152 BP |
363 | * Elements in 'values' are allowed to be zero. This is useful for "struct |
364 | * minimatch", for which ensuring that the miniflow and minimask members have | |
365 | * same 'map' allows optimization . | |
5cb7a798 BP |
366 | */ |
367 | struct miniflow { | |
080e28d0 | 368 | uint64_t map; |
5cb7a798 BP |
369 | uint32_t *values; |
370 | uint32_t inline_values[MINI_N_INLINE]; | |
5cb7a798 BP |
371 | }; |
372 | ||
373 | void miniflow_init(struct miniflow *, const struct flow *); | |
df40c152 BP |
374 | void miniflow_init_with_minimask(struct miniflow *, const struct flow *, |
375 | const struct minimask *); | |
5cb7a798 | 376 | void miniflow_clone(struct miniflow *, const struct miniflow *); |
b2c1f00b | 377 | void miniflow_move(struct miniflow *dst, struct miniflow *); |
5cb7a798 BP |
378 | void miniflow_destroy(struct miniflow *); |
379 | ||
380 | void miniflow_expand(const struct miniflow *, struct flow *); | |
381 | ||
382 | uint32_t miniflow_get(const struct miniflow *, unsigned int u32_ofs); | |
383 | uint16_t miniflow_get_vid(const struct miniflow *); | |
c906cedf | 384 | static inline ovs_be64 miniflow_get_metadata(const struct miniflow *); |
5cb7a798 BP |
385 | |
386 | bool miniflow_equal(const struct miniflow *a, const struct miniflow *b); | |
387 | bool miniflow_equal_in_minimask(const struct miniflow *a, | |
388 | const struct miniflow *b, | |
389 | const struct minimask *); | |
390 | bool miniflow_equal_flow_in_minimask(const struct miniflow *a, | |
391 | const struct flow *b, | |
392 | const struct minimask *); | |
393 | uint32_t miniflow_hash(const struct miniflow *, uint32_t basis); | |
394 | uint32_t miniflow_hash_in_minimask(const struct miniflow *, | |
395 | const struct minimask *, uint32_t basis); | |
476f36e8 JR |
396 | uint64_t miniflow_get_map_in_range(const struct miniflow *, uint8_t start, |
397 | uint8_t end, const uint32_t **data); | |
5cb7a798 BP |
398 | \f |
399 | /* Compressed flow wildcards. */ | |
400 | ||
401 | /* A sparse representation of a "struct flow_wildcards". | |
402 | * | |
403 | * See the large comment on struct miniflow for details. */ | |
404 | struct minimask { | |
405 | struct miniflow masks; | |
406 | }; | |
407 | ||
408 | void minimask_init(struct minimask *, const struct flow_wildcards *); | |
409 | void minimask_clone(struct minimask *, const struct minimask *); | |
b2c1f00b | 410 | void minimask_move(struct minimask *dst, struct minimask *src); |
5cb7a798 BP |
411 | void minimask_combine(struct minimask *dst, |
412 | const struct minimask *a, const struct minimask *b, | |
413 | uint32_t storage[FLOW_U32S]); | |
414 | void minimask_destroy(struct minimask *); | |
415 | ||
416 | void minimask_expand(const struct minimask *, struct flow_wildcards *); | |
417 | ||
418 | uint32_t minimask_get(const struct minimask *, unsigned int u32_ofs); | |
419 | uint16_t minimask_get_vid_mask(const struct minimask *); | |
c906cedf | 420 | static inline ovs_be64 minimask_get_metadata_mask(const struct minimask *); |
5cb7a798 BP |
421 | |
422 | bool minimask_equal(const struct minimask *a, const struct minimask *b); | |
423 | uint32_t minimask_hash(const struct minimask *, uint32_t basis); | |
424 | ||
425 | bool minimask_has_extra(const struct minimask *, const struct minimask *); | |
426 | bool minimask_is_catchall(const struct minimask *); | |
c906cedf BP |
427 | \f |
428 | /* Returns the value of the OpenFlow 1.1+ "metadata" field in 'flow'. */ | |
429 | static inline ovs_be64 | |
430 | miniflow_get_metadata(const struct miniflow *flow) | |
431 | { | |
432 | enum { MD_OFS = offsetof(struct flow, metadata) }; | |
433 | BUILD_ASSERT_DECL(MD_OFS % sizeof(uint32_t) == 0); | |
434 | ovs_be32 hi = (OVS_FORCE ovs_be32) miniflow_get(flow, MD_OFS / 4); | |
435 | ovs_be32 lo = (OVS_FORCE ovs_be32) miniflow_get(flow, MD_OFS / 4 + 1); | |
436 | ||
437 | return htonll(((uint64_t) ntohl(hi) << 32) | ntohl(lo)); | |
438 | } | |
439 | ||
440 | /* Returns the mask for the OpenFlow 1.1+ "metadata" field in 'mask'. | |
441 | * | |
442 | * The return value is all-1-bits if 'mask' matches on the whole value of the | |
443 | * metadata field, all-0-bits if 'mask' entirely wildcards the metadata field, | |
444 | * or some other value if the metadata field is partially matched, partially | |
445 | * wildcarded. */ | |
446 | static inline ovs_be64 | |
447 | minimask_get_metadata_mask(const struct minimask *mask) | |
448 | { | |
449 | return miniflow_get_metadata(&mask->masks); | |
450 | } | |
659c2346 | 451 | |
064af421 | 452 | #endif /* flow.h */ |