2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <sys/types.h>
20 #include <netinet/in.h>
24 #include "byte-order.h"
25 #include "openflow/nicira-ext.h"
26 #include "openflow/openflow.h"
31 struct dpif_flow_stats;
33 struct flow_wildcards;
38 /* This sequence number should be incremented whenever anything involving flows
39 * or the wildcarding of flows changes. This will cause build assertion
40 * failures in places which likely need to be updated. */
41 #define FLOW_WC_SEQ 31
43 /* Number of Open vSwitch extension 32-bit registers. */
45 BUILD_ASSERT_DECL(FLOW_N_REGS <= NXM_NX_MAX_REGS);
46 BUILD_ASSERT_DECL(FLOW_N_REGS % 2 == 0); /* Even. */
48 /* Number of OpenFlow 1.5+ 64-bit registers.
50 * Each of these overlays a pair of Open vSwitch 32-bit registers, so there
51 * are half as many of them.*/
52 #define FLOW_N_XREGS (FLOW_N_REGS / 2)
54 /* Used for struct flow's dl_type member for frames that have no Ethernet
55 * type, that is, pure 802.2 frames. */
56 #define FLOW_DL_TYPE_NONE 0x5ff
58 /* Fragment bits, used for IPv4 and IPv6, always zero for non-IP flows. */
59 #define FLOW_NW_FRAG_ANY (1 << 0) /* Set for any IP frag. */
60 #define FLOW_NW_FRAG_LATER (1 << 1) /* Set for IP frag with nonzero offset. */
61 #define FLOW_NW_FRAG_MASK (FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER)
63 BUILD_ASSERT_DECL(FLOW_NW_FRAG_ANY == NX_IP_FRAG_ANY);
64 BUILD_ASSERT_DECL(FLOW_NW_FRAG_LATER == NX_IP_FRAG_LATER);
66 #define FLOW_TNL_F_DONT_FRAGMENT (1 << 0)
67 #define FLOW_TNL_F_CSUM (1 << 1)
68 #define FLOW_TNL_F_KEY (1 << 2)
69 #define FLOW_TNL_F_OAM (1 << 3)
71 #define FLOW_TNL_F_MASK ((1 << 4) - 1)
73 const char *flow_tun_flag_to_string(uint32_t flags);
75 /* Maximum number of supported MPLS labels. */
76 #define FLOW_MAX_MPLS_LABELS 3
79 * A flow in the network.
81 * Must be initialized to all zeros to make any compiler-induced padding
82 * zeroed. Helps also in keeping unused fields (such as mutually exclusive
83 * IPv4 and IPv6 addresses) zeroed out.
85 * The meaning of 'in_port' is context-dependent. In most cases, it is a
86 * 16-bit OpenFlow 1.0 port number. In the software datapath interface (dpif)
87 * layer and its implementations (e.g. dpif-netlink, dpif-netdev), it is
88 * instead a 32-bit datapath port number.
90 * The fields are organized in four segments to facilitate staged lookup, where
91 * lower layer fields are first used to determine if the later fields need to
92 * be looked at. This enables better wildcarding for datapath flows.
94 * NOTE: Order of the fields is significant, any change in the order must be
95 * reflected in miniflow_extract()!
99 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
100 ovs_be64 metadata; /* OpenFlow Metadata. */
101 uint32_t regs[FLOW_N_REGS]; /* Registers. */
102 uint32_t skb_priority; /* Packet priority for QoS. */
103 uint32_t pkt_mark; /* Packet mark. */
104 uint32_t dp_hash; /* Datapath computed hash value. The exact
105 * computation is opaque to the user space. */
106 union flow_in_port in_port; /* Input port.*/
107 uint32_t recirc_id; /* Must be exact match. */
108 uint32_t conj_id; /* Conjunction ID. */
109 ofp_port_t actset_output; /* Output port in action set. */
110 uint8_t pad1[6]; /* Pad to 64 bits. */
112 /* L2, Order the same as in the Ethernet header! (64-bit aligned) */
113 uint8_t dl_dst[ETH_ADDR_LEN]; /* Ethernet destination address. */
114 uint8_t dl_src[ETH_ADDR_LEN]; /* Ethernet source address. */
115 ovs_be16 dl_type; /* Ethernet frame type. */
116 ovs_be16 vlan_tci; /* If 802.1Q, TCI | VLAN_CFI; otherwise 0. */
117 ovs_be32 mpls_lse[ROUND_UP(FLOW_MAX_MPLS_LABELS, 2)]; /* MPLS label stack
119 /* L3 (64-bit aligned) */
120 ovs_be32 nw_src; /* IPv4 source address. */
121 ovs_be32 nw_dst; /* IPv4 destination address. */
122 struct in6_addr ipv6_src; /* IPv6 source address. */
123 struct in6_addr ipv6_dst; /* IPv6 destination address. */
124 ovs_be32 ipv6_label; /* IPv6 flow label. */
125 uint8_t nw_frag; /* FLOW_FRAG_* flags. */
126 uint8_t nw_tos; /* IP ToS (including DSCP and ECN). */
127 uint8_t nw_ttl; /* IP TTL/Hop Limit. */
128 uint8_t nw_proto; /* IP protocol or low 8 bits of ARP opcode. */
129 struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */
130 uint8_t arp_sha[ETH_ADDR_LEN]; /* ARP/ND source hardware address. */
131 uint8_t arp_tha[ETH_ADDR_LEN]; /* ARP/ND target hardware address. */
132 ovs_be16 tcp_flags; /* TCP flags. With L3 to avoid matching L4. */
133 ovs_be16 pad2; /* Pad to 64 bits. */
135 /* L4 (64-bit aligned) */
136 ovs_be16 tp_src; /* TCP/UDP/SCTP source port. */
137 ovs_be16 tp_dst; /* TCP/UDP/SCTP destination port. */
138 ovs_be32 igmp_group_ip4; /* IGMP group IPv4 address.
139 * Keep last for BUILD_ASSERT_DECL below. */
141 BUILD_ASSERT_DECL(sizeof(struct flow) % sizeof(uint64_t) == 0);
143 #define FLOW_U64S (sizeof(struct flow) / sizeof(uint64_t))
145 /* Some flow fields are mutually exclusive or only appear within the flow
146 * pipeline. IPv6 headers are bigger than IPv4 and MPLS, and IPv6 ND packets
147 * are bigger than TCP,UDP and IGMP packets. */
148 #define FLOW_MAX_PACKET_U64S (FLOW_U64S \
149 /* Unused in datapath */ - FLOW_U64_SIZE(regs) \
150 - FLOW_U64_SIZE(metadata) \
151 /* L2.5/3 */ - FLOW_U64_SIZE(nw_src) /* incl. nw_dst */ \
152 - FLOW_U64_SIZE(mpls_lse) \
153 /* L4 */ - FLOW_U64_SIZE(tp_src) \
156 /* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */
157 BUILD_ASSERT_DECL(offsetof(struct flow, igmp_group_ip4) + sizeof(uint32_t)
158 == sizeof(struct flow_tnl) + 192
159 && FLOW_WC_SEQ == 31);
161 /* Incremental points at which flow classification may be performed in
163 * This is located here since this is dependent on the structure of the
164 * struct flow defined above:
165 * Each offset must be on a distinct, successive U64 boundary strictly
166 * within the struct flow. */
168 FLOW_SEGMENT_1_ENDS_AT = offsetof(struct flow, dl_dst),
169 FLOW_SEGMENT_2_ENDS_AT = offsetof(struct flow, nw_src),
170 FLOW_SEGMENT_3_ENDS_AT = offsetof(struct flow, tp_src),
172 BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT % sizeof(uint64_t) == 0);
173 BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT % sizeof(uint64_t) == 0);
174 BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT % sizeof(uint64_t) == 0);
175 BUILD_ASSERT_DECL( 0 < FLOW_SEGMENT_1_ENDS_AT);
176 BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT < FLOW_SEGMENT_2_ENDS_AT);
177 BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT < FLOW_SEGMENT_3_ENDS_AT);
178 BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT < sizeof(struct flow));
180 extern const uint8_t flow_segment_u64s[];
182 /* Represents the metadata fields of struct flow. */
183 struct flow_metadata {
184 uint32_t dp_hash; /* Datapath computed hash field. */
185 uint32_t recirc_id; /* Recirculation ID. */
186 ovs_be64 tun_id; /* Encapsulating tunnel ID. */
187 ovs_be32 tun_src; /* Tunnel outer IPv4 src addr */
188 ovs_be32 tun_dst; /* Tunnel outer IPv4 dst addr */
189 ovs_be16 gbp_id; /* Group policy ID */
190 uint8_t gbp_flags; /* Group policy flags */
191 ovs_be64 metadata; /* OpenFlow 1.1+ metadata field. */
192 uint32_t regs[FLOW_N_REGS]; /* Registers. */
193 uint32_t pkt_mark; /* Packet mark. */
194 ofp_port_t in_port; /* OpenFlow port or zero. */
197 void flow_extract(struct dp_packet *, struct flow *);
199 void flow_zero_wildcards(struct flow *, const struct flow_wildcards *);
200 void flow_unwildcard_tp_ports(const struct flow *, struct flow_wildcards *);
201 void flow_get_metadata(const struct flow *, struct flow_metadata *);
203 char *flow_to_string(const struct flow *);
204 void format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t),
205 uint32_t flags, char del);
206 void format_flags_masked(struct ds *ds, const char *name,
207 const char *(*bit_to_string)(uint32_t),
208 uint32_t flags, uint32_t mask);
210 void flow_format(struct ds *, const struct flow *);
211 void flow_print(FILE *, const struct flow *);
212 static inline int flow_compare_3way(const struct flow *, const struct flow *);
213 static inline bool flow_equal(const struct flow *, const struct flow *);
214 static inline size_t flow_hash(const struct flow *, uint32_t basis);
216 void flow_set_dl_vlan(struct flow *, ovs_be16 vid);
217 void flow_set_vlan_vid(struct flow *, ovs_be16 vid);
218 void flow_set_vlan_pcp(struct flow *, uint8_t pcp);
220 int flow_count_mpls_labels(const struct flow *, struct flow_wildcards *);
221 int flow_count_common_mpls_labels(const struct flow *a, int an,
222 const struct flow *b, int bn,
223 struct flow_wildcards *wc);
224 void flow_push_mpls(struct flow *, int n, ovs_be16 mpls_eth_type,
225 struct flow_wildcards *);
226 bool flow_pop_mpls(struct flow *, int n, ovs_be16 eth_type,
227 struct flow_wildcards *);
228 void flow_set_mpls_label(struct flow *, int idx, ovs_be32 label);
229 void flow_set_mpls_ttl(struct flow *, int idx, uint8_t ttl);
230 void flow_set_mpls_tc(struct flow *, int idx, uint8_t tc);
231 void flow_set_mpls_bos(struct flow *, int idx, uint8_t stack);
232 void flow_set_mpls_lse(struct flow *, int idx, ovs_be32 lse);
234 void flow_compose(struct dp_packet *, const struct flow *);
236 static inline uint64_t
237 flow_get_xreg(const struct flow *flow, int idx)
239 return ((uint64_t) flow->regs[idx * 2] << 32) | flow->regs[idx * 2 + 1];
243 flow_set_xreg(struct flow *flow, int idx, uint64_t value)
245 flow->regs[idx * 2] = value >> 32;
246 flow->regs[idx * 2 + 1] = value;
250 flow_compare_3way(const struct flow *a, const struct flow *b)
252 return memcmp(a, b, sizeof *a);
256 flow_equal(const struct flow *a, const struct flow *b)
258 return !flow_compare_3way(a, b);
262 flow_hash(const struct flow *flow, uint32_t basis)
264 return hash_words64((const uint64_t *)flow,
265 sizeof *flow / sizeof(uint64_t), basis);
268 static inline uint16_t
269 ofp_to_u16(ofp_port_t ofp_port)
271 return (OVS_FORCE uint16_t) ofp_port;
274 static inline uint32_t
275 odp_to_u32(odp_port_t odp_port)
277 return (OVS_FORCE uint32_t) odp_port;
280 static inline uint32_t
281 ofp11_to_u32(ofp11_port_t ofp11_port)
283 return (OVS_FORCE uint32_t) ofp11_port;
286 static inline ofp_port_t
287 u16_to_ofp(uint16_t port)
289 return OFP_PORT_C(port);
292 static inline odp_port_t
293 u32_to_odp(uint32_t port)
295 return ODP_PORT_C(port);
298 static inline ofp11_port_t
299 u32_to_ofp11(uint32_t port)
301 return OFP11_PORT_C(port);
304 static inline uint32_t
305 hash_ofp_port(ofp_port_t ofp_port)
307 return hash_int(ofp_to_u16(ofp_port), 0);
310 static inline uint32_t
311 hash_odp_port(odp_port_t odp_port)
313 return hash_int(odp_to_u32(odp_port), 0);
316 /* Wildcards for a flow.
318 * A 1-bit in each bit in 'masks' indicates that the corresponding bit of
319 * the flow is significant (must match). A 0-bit indicates that the
320 * corresponding bit of the flow is wildcarded (need not match). */
321 struct flow_wildcards {
325 #define WC_MASK_FIELD(WC, FIELD) \
326 memset(&(WC)->masks.FIELD, 0xff, sizeof (WC)->masks.FIELD)
327 #define WC_UNMASK_FIELD(WC, FIELD) \
328 memset(&(WC)->masks.FIELD, 0, sizeof (WC)->masks.FIELD)
330 void flow_wildcards_init_catchall(struct flow_wildcards *);
332 void flow_wildcards_init_for_packet(struct flow_wildcards *,
333 const struct flow *);
334 uint64_t flow_wc_map(const struct flow *);
336 void flow_wildcards_clear_non_packet_fields(struct flow_wildcards *);
338 bool flow_wildcards_is_catchall(const struct flow_wildcards *);
340 void flow_wildcards_set_reg_mask(struct flow_wildcards *,
341 int idx, uint32_t mask);
342 void flow_wildcards_set_xreg_mask(struct flow_wildcards *,
343 int idx, uint64_t mask);
345 void flow_wildcards_and(struct flow_wildcards *dst,
346 const struct flow_wildcards *src1,
347 const struct flow_wildcards *src2);
348 void flow_wildcards_or(struct flow_wildcards *dst,
349 const struct flow_wildcards *src1,
350 const struct flow_wildcards *src2);
351 bool flow_wildcards_has_extra(const struct flow_wildcards *,
352 const struct flow_wildcards *);
353 uint32_t flow_wildcards_hash(const struct flow_wildcards *, uint32_t basis);
354 bool flow_wildcards_equal(const struct flow_wildcards *,
355 const struct flow_wildcards *);
356 uint32_t flow_hash_5tuple(const struct flow *flow, uint32_t basis);
357 uint32_t flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis);
359 /* Initialize a flow with random fields that matter for nx_hash_fields. */
360 void flow_random_hash_fields(struct flow *);
361 void flow_mask_hash_fields(const struct flow *, struct flow_wildcards *,
362 enum nx_hash_fields);
363 uint32_t flow_hash_fields(const struct flow *, enum nx_hash_fields,
365 const char *flow_hash_fields_to_str(enum nx_hash_fields);
366 bool flow_hash_fields_valid(enum nx_hash_fields);
368 uint32_t flow_hash_in_wildcards(const struct flow *,
369 const struct flow_wildcards *,
372 bool flow_equal_except(const struct flow *a, const struct flow *b,
373 const struct flow_wildcards *);
375 /* Compressed flow. */
377 /* Number of 64-bit words present in struct miniflow. */
378 #define MINI_N_INLINE 4
380 /* Maximum number of 64-bit words supported. */
381 BUILD_ASSERT_DECL(FLOW_U64S <= 63);
383 /* A sparse representation of a "struct flow".
385 * A "struct flow" is fairly large and tends to be mostly zeros. Sparse
386 * representation has two advantages. First, it saves memory. Second, it
387 * saves time when the goal is to iterate over only the nonzero parts of the
390 * The 'map' member holds one bit for each uint64_t in a "struct flow". Each
391 * 0-bit indicates that the corresponding uint64_t is zero, each 1-bit that it
392 * *may* be nonzero (see below how this applies to minimasks).
394 * The 'values_inline' boolean member indicates that the values are at
395 * 'inline_values'. If 'values_inline' is zero, then the values are
396 * offline at 'offline_values'. In either case, values is an array that has
397 * one element for each 1-bit in 'map'. The least-numbered 1-bit is in
398 * the first element of the values array, the next 1-bit is in the next array
399 * element, and so on.
401 * MINI_N_INLINE is the default number of inline words. When a miniflow is
402 * dynamically allocated the actual amount of inline storage may be different.
403 * In that case 'inline_values' contains storage at least for the number
404 * of words indicated by 'map' (one uint64_t for each 1-bit in the map).
406 * Elements in values array are allowed to be zero. This is useful for "struct
407 * minimatch", for which ensuring that the miniflow and minimask members have
408 * same 'map' allows optimization. This allowance applies only to a miniflow
409 * that is not a mask. That is, a minimask may NOT have zero elements in
414 uint64_t values_inline:1;
416 uint64_t *offline_values;
417 uint64_t inline_values[MINI_N_INLINE]; /* Minimum inline size. */
420 BUILD_ASSERT_DECL(sizeof(struct miniflow)
421 == sizeof(uint64_t) + MINI_N_INLINE * sizeof(uint64_t));
423 #define MINIFLOW_VALUES_SIZE(COUNT) ((COUNT) * sizeof(uint64_t))
425 static inline uint64_t *miniflow_values(struct miniflow *mf)
427 return OVS_LIKELY(mf->values_inline)
428 ? mf->inline_values : mf->offline_values;
431 static inline const uint64_t *miniflow_get_values(const struct miniflow *mf)
433 return OVS_LIKELY(mf->values_inline)
434 ? mf->inline_values : mf->offline_values;
437 /* This is useful for initializing a miniflow for a miniflow_extract() call. */
438 static inline void miniflow_initialize(struct miniflow *mf,
439 uint64_t buf[FLOW_U64S])
442 mf->values_inline = (buf == (uint64_t *)(mf + 1));
443 if (!mf->values_inline) {
444 mf->offline_values = buf;
450 /* The 'dst->values' must be initialized with a buffer with space for
451 * FLOW_U64S. 'dst->map' is ignored on input and set on output to
452 * indicate which fields were extracted. */
453 void miniflow_extract(struct dp_packet *packet, struct miniflow *dst);
454 void miniflow_init(struct miniflow *, const struct flow *);
455 void miniflow_init_with_minimask(struct miniflow *, const struct flow *,
456 const struct minimask *);
457 void miniflow_clone(struct miniflow *, const struct miniflow *);
458 void miniflow_clone_inline(struct miniflow *, const struct miniflow *,
460 void miniflow_move(struct miniflow *dst, struct miniflow *);
461 void miniflow_destroy(struct miniflow *);
463 void miniflow_expand(const struct miniflow *, struct flow *);
465 static inline uint64_t flow_u64_value(const struct flow *flow, size_t index)
467 return ((uint64_t *)(flow))[index];
470 static inline uint64_t *flow_u64_lvalue(struct flow *flow, size_t index)
472 return &((uint64_t *)(flow))[index];
476 flow_get_next_in_map(const struct flow *flow, uint64_t map, uint64_t *value)
479 *value = flow_u64_value(flow, raw_ctz(map));
485 /* Iterate through all flow u64 values specified by 'MAP'. */
486 #define FLOW_FOR_EACH_IN_MAP(VALUE, FLOW, MAP) \
487 for (uint64_t map__ = (MAP); \
488 flow_get_next_in_map(FLOW, map__, &(VALUE)); \
489 map__ = zero_rightmost_1bit(map__))
491 /* Iterate through all struct flow u64 indices specified by 'MAP'. */
492 #define MAP_FOR_EACH_INDEX(U64IDX, MAP) \
493 for (uint64_t map__ = (MAP); \
494 map__ && ((U64IDX) = raw_ctz(map__), true); \
495 map__ = zero_rightmost_1bit(map__))
497 #define FLOW_U64_SIZE(FIELD) \
498 DIV_ROUND_UP(sizeof(((struct flow *)0)->FIELD), sizeof(uint64_t))
500 #define MINIFLOW_MAP(FIELD) \
501 (((UINT64_C(1) << FLOW_U64_SIZE(FIELD)) - 1) \
502 << (offsetof(struct flow, FIELD) / sizeof(uint64_t)))
504 struct mf_for_each_in_map_aux {
505 const uint64_t *values;
511 mf_get_next_in_map(struct mf_for_each_in_map_aux *aux, uint64_t *value)
514 uint64_t rm1bit = rightmost_1bit(aux->map);
517 if (aux->fmap & rm1bit) {
518 /* Advance 'aux->values' to point to the value for 'rm1bit'. */
519 uint64_t trash = aux->fmap & (rm1bit - 1);
522 aux->values += count_1bits(trash);
525 /* Retrieve the value for 'rm1bit' then advance past it. */
527 *value = *aux->values++;
537 /* Iterate through all miniflow u64 values specified by 'MAP'. */
538 #define MINIFLOW_FOR_EACH_IN_MAP(VALUE, FLOW, MAP) \
539 for (struct mf_for_each_in_map_aux aux__ \
540 = { miniflow_get_values(FLOW), (FLOW)->map, MAP }; \
541 mf_get_next_in_map(&aux__, &(VALUE)); \
544 /* This can be used when it is known that 'u64_idx' is set in 'map'. */
545 static inline uint64_t
546 miniflow_values_get__(const uint64_t *values, uint64_t map, int u64_idx)
548 return values[count_1bits(map & ((UINT64_C(1) << u64_idx) - 1))];
551 /* This can be used when it is known that 'u64_idx' is set in
552 * the map of 'mf'. */
553 static inline uint64_t
554 miniflow_get__(const struct miniflow *mf, int u64_idx)
556 return miniflow_values_get__(miniflow_get_values(mf), mf->map, u64_idx);
559 /* Get the value of 'FIELD' of an up to 8 byte wide integer type 'TYPE' of
561 #define MINIFLOW_GET_TYPE(MF, TYPE, OFS) \
562 (((MF)->map & (UINT64_C(1) << (OFS) / sizeof(uint64_t))) \
563 ? ((OVS_FORCE const TYPE *) \
564 (miniflow_get_values(MF) \
565 + count_1bits((MF)->map & \
566 ((UINT64_C(1) << (OFS) / sizeof(uint64_t)) - 1)))) \
567 [(OFS) % sizeof(uint64_t) / sizeof(TYPE)] \
570 #define MINIFLOW_GET_U8(FLOW, FIELD) \
571 MINIFLOW_GET_TYPE(FLOW, uint8_t, offsetof(struct flow, FIELD))
572 #define MINIFLOW_GET_U16(FLOW, FIELD) \
573 MINIFLOW_GET_TYPE(FLOW, uint16_t, offsetof(struct flow, FIELD))
574 #define MINIFLOW_GET_BE16(FLOW, FIELD) \
575 MINIFLOW_GET_TYPE(FLOW, ovs_be16, offsetof(struct flow, FIELD))
576 #define MINIFLOW_GET_U32(FLOW, FIELD) \
577 MINIFLOW_GET_TYPE(FLOW, uint32_t, offsetof(struct flow, FIELD))
578 #define MINIFLOW_GET_BE32(FLOW, FIELD) \
579 MINIFLOW_GET_TYPE(FLOW, ovs_be32, offsetof(struct flow, FIELD))
580 #define MINIFLOW_GET_U64(FLOW, FIELD) \
581 MINIFLOW_GET_TYPE(FLOW, uint64_t, offsetof(struct flow, FIELD))
582 #define MINIFLOW_GET_BE64(FLOW, FIELD) \
583 MINIFLOW_GET_TYPE(FLOW, ovs_be64, offsetof(struct flow, FIELD))
585 static inline uint64_t miniflow_get(const struct miniflow *,
586 unsigned int u64_ofs);
587 static inline uint32_t miniflow_get_u32(const struct miniflow *,
588 unsigned int u32_ofs);
589 static inline ovs_be32 miniflow_get_be32(const struct miniflow *,
590 unsigned int be32_ofs);
591 static inline uint16_t miniflow_get_vid(const struct miniflow *);
592 static inline uint16_t miniflow_get_tcp_flags(const struct miniflow *);
593 static inline ovs_be64 miniflow_get_metadata(const struct miniflow *);
595 bool miniflow_equal(const struct miniflow *a, const struct miniflow *b);
596 bool miniflow_equal_in_minimask(const struct miniflow *a,
597 const struct miniflow *b,
598 const struct minimask *);
599 bool miniflow_equal_flow_in_minimask(const struct miniflow *a,
600 const struct flow *b,
601 const struct minimask *);
602 uint32_t miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis);
605 /* Compressed flow wildcards. */
607 /* A sparse representation of a "struct flow_wildcards".
609 * See the large comment on struct miniflow for details.
611 * Note: While miniflow can have zero data for a 1-bit in the map,
612 * a minimask may not! We rely on this in the implementation. */
614 struct miniflow masks;
617 void minimask_init(struct minimask *, const struct flow_wildcards *);
618 void minimask_clone(struct minimask *, const struct minimask *);
619 void minimask_move(struct minimask *dst, struct minimask *src);
620 void minimask_combine(struct minimask *dst,
621 const struct minimask *a, const struct minimask *b,
622 uint64_t storage[FLOW_U64S]);
623 void minimask_destroy(struct minimask *);
625 void minimask_expand(const struct minimask *, struct flow_wildcards *);
627 static inline uint32_t minimask_get_u32(const struct minimask *,
628 unsigned int u32_ofs);
629 static inline ovs_be32 minimask_get_be32(const struct minimask *,
630 unsigned int be32_ofs);
631 static inline uint16_t minimask_get_vid_mask(const struct minimask *);
632 static inline ovs_be64 minimask_get_metadata_mask(const struct minimask *);
634 bool minimask_equal(const struct minimask *a, const struct minimask *b);
635 bool minimask_has_extra(const struct minimask *, const struct minimask *);
638 /* Returns true if 'mask' matches every packet, false if 'mask' fixes any bits
641 minimask_is_catchall(const struct minimask *mask)
643 /* For every 1-bit in mask's map, the corresponding value is non-zero,
644 * so the only way the mask can not fix any bits or fields is for the
645 * map the be zero. */
646 return mask->masks.map == 0;
649 /* Returns the uint64_t that would be at byte offset '8 * u64_ofs' if 'flow'
650 * were expanded into a "struct flow". */
651 static inline uint64_t miniflow_get(const struct miniflow *flow,
652 unsigned int u64_ofs)
654 return flow->map & (UINT64_C(1) << u64_ofs)
655 ? miniflow_get__(flow, u64_ofs) : 0;
658 static inline uint32_t miniflow_get_u32(const struct miniflow *flow,
659 unsigned int u32_ofs)
661 uint64_t value = miniflow_get(flow, u32_ofs / 2);
664 return (u32_ofs & 1) ? value : value >> 32;
666 return (u32_ofs & 1) ? value >> 32 : value;
670 static inline ovs_be32 miniflow_get_be32(const struct miniflow *flow,
671 unsigned int be32_ofs)
673 return (OVS_FORCE ovs_be32)miniflow_get_u32(flow, be32_ofs);
676 /* Returns the VID within the vlan_tci member of the "struct flow" represented
678 static inline uint16_t
679 miniflow_get_vid(const struct miniflow *flow)
681 ovs_be16 tci = MINIFLOW_GET_BE16(flow, vlan_tci);
682 return vlan_tci_to_vid(tci);
685 /* Returns the uint32_t that would be at byte offset '4 * u32_ofs' if 'mask'
686 * were expanded into a "struct flow_wildcards". */
687 static inline uint32_t
688 minimask_get_u32(const struct minimask *mask, unsigned int u32_ofs)
690 return miniflow_get_u32(&mask->masks, u32_ofs);
693 static inline ovs_be32
694 minimask_get_be32(const struct minimask *mask, unsigned int be32_ofs)
696 return (OVS_FORCE ovs_be32)minimask_get_u32(mask, be32_ofs);
699 /* Returns the VID mask within the vlan_tci member of the "struct
700 * flow_wildcards" represented by 'mask'. */
701 static inline uint16_t
702 minimask_get_vid_mask(const struct minimask *mask)
704 return miniflow_get_vid(&mask->masks);
707 /* Returns the value of the "tcp_flags" field in 'flow'. */
708 static inline uint16_t
709 miniflow_get_tcp_flags(const struct miniflow *flow)
711 return ntohs(MINIFLOW_GET_BE16(flow, tcp_flags));
714 /* Returns the value of the OpenFlow 1.1+ "metadata" field in 'flow'. */
715 static inline ovs_be64
716 miniflow_get_metadata(const struct miniflow *flow)
718 return MINIFLOW_GET_BE64(flow, metadata);
721 /* Returns the mask for the OpenFlow 1.1+ "metadata" field in 'mask'.
723 * The return value is all-1-bits if 'mask' matches on the whole value of the
724 * metadata field, all-0-bits if 'mask' entirely wildcards the metadata field,
725 * or some other value if the metadata field is partially matched, partially
727 static inline ovs_be64
728 minimask_get_metadata_mask(const struct minimask *mask)
730 return MINIFLOW_GET_BE64(&mask->masks, metadata);
733 /* Perform a bitwise OR of miniflow 'src' flow data with the equivalent
734 * fields in 'dst', storing the result in 'dst'. */
736 flow_union_with_miniflow(struct flow *dst, const struct miniflow *src)
738 uint64_t *dst_u64 = (uint64_t *) dst;
739 const uint64_t *p = miniflow_get_values(src);
742 MAP_FOR_EACH_INDEX(idx, src->map) {
743 dst_u64[idx] |= *p++;
748 pkt_metadata_from_flow(struct pkt_metadata *md, const struct flow *flow)
750 md->recirc_id = flow->recirc_id;
751 md->dp_hash = flow->dp_hash;
752 md->tunnel = flow->tunnel;
753 md->skb_priority = flow->skb_priority;
754 md->pkt_mark = flow->pkt_mark;
755 md->in_port = flow->in_port;
758 static inline bool is_ip_any(const struct flow *flow)
760 return dl_type_is_ip_any(flow->dl_type);
763 static inline bool is_icmpv4(const struct flow *flow)
765 return (flow->dl_type == htons(ETH_TYPE_IP)
766 && flow->nw_proto == IPPROTO_ICMP);
769 static inline bool is_icmpv6(const struct flow *flow)
771 return (flow->dl_type == htons(ETH_TYPE_IPV6)
772 && flow->nw_proto == IPPROTO_ICMPV6);
775 static inline bool is_stp(const struct flow *flow)
777 return (eth_addr_equals(flow->dl_dst, eth_addr_stp)
778 && flow->dl_type == htons(FLOW_DL_TYPE_NONE));