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;
39 /* This sequence number should be incremented whenever anything involving flows
40 * or the wildcarding of flows changes. This will cause build assertion
41 * failures in places which likely need to be updated. */
42 #define FLOW_WC_SEQ 33
44 /* Number of Open vSwitch extension 32-bit registers. */
46 BUILD_ASSERT_DECL(FLOW_N_REGS <= NXM_NX_MAX_REGS);
47 BUILD_ASSERT_DECL(FLOW_N_REGS % 2 == 0); /* Even. */
49 /* Number of OpenFlow 1.5+ 64-bit registers.
51 * Each of these overlays a pair of Open vSwitch 32-bit registers, so there
52 * are half as many of them.*/
53 #define FLOW_N_XREGS (FLOW_N_REGS / 2)
55 /* Used for struct flow's dl_type member for frames that have no Ethernet
56 * type, that is, pure 802.2 frames. */
57 #define FLOW_DL_TYPE_NONE 0x5ff
59 /* Fragment bits, used for IPv4 and IPv6, always zero for non-IP flows. */
60 #define FLOW_NW_FRAG_ANY (1 << 0) /* Set for any IP frag. */
61 #define FLOW_NW_FRAG_LATER (1 << 1) /* Set for IP frag with nonzero offset. */
62 #define FLOW_NW_FRAG_MASK (FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER)
64 BUILD_ASSERT_DECL(FLOW_NW_FRAG_ANY == NX_IP_FRAG_ANY);
65 BUILD_ASSERT_DECL(FLOW_NW_FRAG_LATER == NX_IP_FRAG_LATER);
67 /* Some flags are exposed through OpenFlow while others are used only
71 #define FLOW_TNL_F_OAM (1 << 0)
73 #define FLOW_TNL_PUB_F_MASK ((1 << 1) - 1)
74 BUILD_ASSERT_DECL(FLOW_TNL_F_OAM == NX_TUN_FLAG_OAM);
77 #define FLOW_TNL_F_DONT_FRAGMENT (1 << 1)
78 #define FLOW_TNL_F_CSUM (1 << 2)
79 #define FLOW_TNL_F_KEY (1 << 3)
81 #define FLOW_TNL_F_MASK ((1 << 4) - 1)
83 /* Purely internal to OVS userspace. These flags should never be exposed to
84 * the outside world and so aren't included in the flags mask. */
86 /* Tunnel information is in userspace datapath format. */
87 #define FLOW_TNL_F_UDPIF (1 << 4)
89 const char *flow_tun_flag_to_string(uint32_t flags);
91 /* Maximum number of supported MPLS labels. */
92 #define FLOW_MAX_MPLS_LABELS 3
95 * A flow in the network.
97 * Must be initialized to all zeros to make any compiler-induced padding
98 * zeroed. Helps also in keeping unused fields (such as mutually exclusive
99 * IPv4 and IPv6 addresses) zeroed out.
101 * The meaning of 'in_port' is context-dependent. In most cases, it is a
102 * 16-bit OpenFlow 1.0 port number. In the software datapath interface (dpif)
103 * layer and its implementations (e.g. dpif-netlink, dpif-netdev), it is
104 * instead a 32-bit datapath port number.
106 * The fields are organized in four segments to facilitate staged lookup, where
107 * lower layer fields are first used to determine if the later fields need to
108 * be looked at. This enables better wildcarding for datapath flows.
110 * NOTE: Order of the fields is significant, any change in the order must be
111 * reflected in miniflow_extract()!
115 struct flow_tnl tunnel; /* Encapsulating tunnel parameters. */
116 ovs_be64 metadata; /* OpenFlow Metadata. */
117 uint32_t regs[FLOW_N_REGS]; /* Registers. */
118 uint32_t skb_priority; /* Packet priority for QoS. */
119 uint32_t pkt_mark; /* Packet mark. */
120 uint32_t dp_hash; /* Datapath computed hash value. The exact
121 * computation is opaque to the user space. */
122 union flow_in_port in_port; /* Input port.*/
123 uint32_t recirc_id; /* Must be exact match. */
124 uint32_t conj_id; /* Conjunction ID. */
125 ofp_port_t actset_output; /* Output port in action set. */
126 uint8_t pad1[6]; /* Pad to 64 bits. */
128 /* L2, Order the same as in the Ethernet header! (64-bit aligned) */
129 uint8_t dl_dst[ETH_ADDR_LEN]; /* Ethernet destination address. */
130 uint8_t dl_src[ETH_ADDR_LEN]; /* Ethernet source address. */
131 ovs_be16 dl_type; /* Ethernet frame type. */
132 ovs_be16 vlan_tci; /* If 802.1Q, TCI | VLAN_CFI; otherwise 0. */
133 ovs_be32 mpls_lse[ROUND_UP(FLOW_MAX_MPLS_LABELS, 2)]; /* MPLS label stack
135 /* L3 (64-bit aligned) */
136 ovs_be32 nw_src; /* IPv4 source address. */
137 ovs_be32 nw_dst; /* IPv4 destination address. */
138 struct in6_addr ipv6_src; /* IPv6 source address. */
139 struct in6_addr ipv6_dst; /* IPv6 destination address. */
140 ovs_be32 ipv6_label; /* IPv6 flow label. */
141 uint8_t nw_frag; /* FLOW_FRAG_* flags. */
142 uint8_t nw_tos; /* IP ToS (including DSCP and ECN). */
143 uint8_t nw_ttl; /* IP TTL/Hop Limit. */
144 uint8_t nw_proto; /* IP protocol or low 8 bits of ARP opcode. */
145 struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */
146 uint8_t arp_sha[ETH_ADDR_LEN]; /* ARP/ND source hardware address. */
147 uint8_t arp_tha[ETH_ADDR_LEN]; /* ARP/ND target hardware address. */
148 ovs_be16 tcp_flags; /* TCP flags. With L3 to avoid matching L4. */
149 ovs_be16 pad2; /* Pad to 64 bits. */
151 /* L4 (64-bit aligned) */
152 ovs_be16 tp_src; /* TCP/UDP/SCTP source port. */
153 ovs_be16 tp_dst; /* TCP/UDP/SCTP destination port. */
154 ovs_be32 igmp_group_ip4; /* IGMP group IPv4 address.
155 * Keep last for BUILD_ASSERT_DECL below. */
157 BUILD_ASSERT_DECL(sizeof(struct flow) % sizeof(uint64_t) == 0);
158 BUILD_ASSERT_DECL(sizeof(struct flow_tnl) % sizeof(uint64_t) == 0);
159 /* Number of uint64_t units in flow tunnel metadata. */
160 #define FLOW_TNL_U64S (sizeof(struct flow_tnl) / sizeof(uint64_t))
162 #define FLOW_U64S (sizeof(struct flow) / sizeof(uint64_t))
164 /* Some flow fields are mutually exclusive or only appear within the flow
165 * pipeline. IPv6 headers are bigger than IPv4 and MPLS, and IPv6 ND packets
166 * are bigger than TCP,UDP and IGMP packets. */
167 #define FLOW_MAX_PACKET_U64S (FLOW_U64S \
168 /* Unused in datapath */ - FLOW_U64_SIZE(regs) \
169 - FLOW_U64_SIZE(metadata) \
170 /* L2.5/3 */ - FLOW_U64_SIZE(nw_src) /* incl. nw_dst */ \
171 - FLOW_U64_SIZE(mpls_lse) \
172 /* L4 */ - FLOW_U64_SIZE(tp_src) \
175 /* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */
176 BUILD_ASSERT_DECL(offsetof(struct flow, igmp_group_ip4) + sizeof(uint32_t)
177 == sizeof(struct flow_tnl) + 192
178 && FLOW_WC_SEQ == 33);
180 /* Incremental points at which flow classification may be performed in
182 * This is located here since this is dependent on the structure of the
183 * struct flow defined above:
184 * Each offset must be on a distinct, successive U64 boundary strictly
185 * within the struct flow. */
187 FLOW_SEGMENT_1_ENDS_AT = offsetof(struct flow, dl_dst),
188 FLOW_SEGMENT_2_ENDS_AT = offsetof(struct flow, nw_src),
189 FLOW_SEGMENT_3_ENDS_AT = offsetof(struct flow, tp_src),
191 BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT % sizeof(uint64_t) == 0);
192 BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT % sizeof(uint64_t) == 0);
193 BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT % sizeof(uint64_t) == 0);
194 BUILD_ASSERT_DECL( 0 < FLOW_SEGMENT_1_ENDS_AT);
195 BUILD_ASSERT_DECL(FLOW_SEGMENT_1_ENDS_AT < FLOW_SEGMENT_2_ENDS_AT);
196 BUILD_ASSERT_DECL(FLOW_SEGMENT_2_ENDS_AT < FLOW_SEGMENT_3_ENDS_AT);
197 BUILD_ASSERT_DECL(FLOW_SEGMENT_3_ENDS_AT < sizeof(struct flow));
199 extern const uint8_t flow_segment_u64s[];
201 void flow_extract(struct dp_packet *, struct flow *);
203 void flow_zero_wildcards(struct flow *, const struct flow_wildcards *);
204 void flow_unwildcard_tp_ports(const struct flow *, struct flow_wildcards *);
205 void flow_get_metadata(const struct flow *, struct match *flow_metadata);
207 char *flow_to_string(const struct flow *);
208 void format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t),
209 uint32_t flags, char del);
210 void format_flags_masked(struct ds *ds, const char *name,
211 const char *(*bit_to_string)(uint32_t),
212 uint32_t flags, uint32_t mask, uint32_t max_mask);
213 int parse_flags(const char *s, const char *(*bit_to_string)(uint32_t),
214 char end, const char *field_name, char **res_string,
215 uint32_t *res_flags, uint32_t allowed, uint32_t *res_mask);
217 void flow_format(struct ds *, const struct flow *);
218 void flow_print(FILE *, const struct flow *);
219 static inline int flow_compare_3way(const struct flow *, const struct flow *);
220 static inline bool flow_equal(const struct flow *, const struct flow *);
221 static inline size_t flow_hash(const struct flow *, uint32_t basis);
223 void flow_set_dl_vlan(struct flow *, ovs_be16 vid);
224 void flow_set_vlan_vid(struct flow *, ovs_be16 vid);
225 void flow_set_vlan_pcp(struct flow *, uint8_t pcp);
227 int flow_count_mpls_labels(const struct flow *, struct flow_wildcards *);
228 int flow_count_common_mpls_labels(const struct flow *a, int an,
229 const struct flow *b, int bn,
230 struct flow_wildcards *wc);
231 void flow_push_mpls(struct flow *, int n, ovs_be16 mpls_eth_type,
232 struct flow_wildcards *);
233 bool flow_pop_mpls(struct flow *, int n, ovs_be16 eth_type,
234 struct flow_wildcards *);
235 void flow_set_mpls_label(struct flow *, int idx, ovs_be32 label);
236 void flow_set_mpls_ttl(struct flow *, int idx, uint8_t ttl);
237 void flow_set_mpls_tc(struct flow *, int idx, uint8_t tc);
238 void flow_set_mpls_bos(struct flow *, int idx, uint8_t stack);
239 void flow_set_mpls_lse(struct flow *, int idx, ovs_be32 lse);
241 void flow_compose(struct dp_packet *, const struct flow *);
243 static inline uint64_t
244 flow_get_xreg(const struct flow *flow, int idx)
246 return ((uint64_t) flow->regs[idx * 2] << 32) | flow->regs[idx * 2 + 1];
250 flow_set_xreg(struct flow *flow, int idx, uint64_t value)
252 flow->regs[idx * 2] = value >> 32;
253 flow->regs[idx * 2 + 1] = value;
257 flow_compare_3way(const struct flow *a, const struct flow *b)
259 return memcmp(a, b, sizeof *a);
263 flow_equal(const struct flow *a, const struct flow *b)
265 return !flow_compare_3way(a, b);
269 flow_hash(const struct flow *flow, uint32_t basis)
271 return hash_words64((const uint64_t *)flow,
272 sizeof *flow / sizeof(uint64_t), basis);
275 static inline uint16_t
276 ofp_to_u16(ofp_port_t ofp_port)
278 return (OVS_FORCE uint16_t) ofp_port;
281 static inline uint32_t
282 odp_to_u32(odp_port_t odp_port)
284 return (OVS_FORCE uint32_t) odp_port;
287 static inline uint32_t
288 ofp11_to_u32(ofp11_port_t ofp11_port)
290 return (OVS_FORCE uint32_t) ofp11_port;
293 static inline ofp_port_t
294 u16_to_ofp(uint16_t port)
296 return OFP_PORT_C(port);
299 static inline odp_port_t
300 u32_to_odp(uint32_t port)
302 return ODP_PORT_C(port);
305 static inline ofp11_port_t
306 u32_to_ofp11(uint32_t port)
308 return OFP11_PORT_C(port);
311 static inline uint32_t
312 hash_ofp_port(ofp_port_t ofp_port)
314 return hash_int(ofp_to_u16(ofp_port), 0);
317 static inline uint32_t
318 hash_odp_port(odp_port_t odp_port)
320 return hash_int(odp_to_u32(odp_port), 0);
323 /* Wildcards for a flow.
325 * A 1-bit in each bit in 'masks' indicates that the corresponding bit of
326 * the flow is significant (must match). A 0-bit indicates that the
327 * corresponding bit of the flow is wildcarded (need not match). */
328 struct flow_wildcards {
332 #define WC_MASK_FIELD(WC, FIELD) \
333 memset(&(WC)->masks.FIELD, 0xff, sizeof (WC)->masks.FIELD)
334 #define WC_UNMASK_FIELD(WC, FIELD) \
335 memset(&(WC)->masks.FIELD, 0, sizeof (WC)->masks.FIELD)
337 void flow_wildcards_init_catchall(struct flow_wildcards *);
339 void flow_wildcards_init_for_packet(struct flow_wildcards *,
340 const struct flow *);
342 void flow_wildcards_clear_non_packet_fields(struct flow_wildcards *);
344 bool flow_wildcards_is_catchall(const struct flow_wildcards *);
346 void flow_wildcards_set_reg_mask(struct flow_wildcards *,
347 int idx, uint32_t mask);
348 void flow_wildcards_set_xreg_mask(struct flow_wildcards *,
349 int idx, uint64_t mask);
351 void flow_wildcards_and(struct flow_wildcards *dst,
352 const struct flow_wildcards *src1,
353 const struct flow_wildcards *src2);
354 void flow_wildcards_or(struct flow_wildcards *dst,
355 const struct flow_wildcards *src1,
356 const struct flow_wildcards *src2);
357 bool flow_wildcards_has_extra(const struct flow_wildcards *,
358 const struct flow_wildcards *);
359 uint32_t flow_wildcards_hash(const struct flow_wildcards *, uint32_t basis);
360 bool flow_wildcards_equal(const struct flow_wildcards *,
361 const struct flow_wildcards *);
362 uint32_t flow_hash_5tuple(const struct flow *flow, uint32_t basis);
363 uint32_t flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis);
364 uint32_t flow_hash_symmetric_l3l4(const struct flow *flow, uint32_t basis,
365 bool inc_udp_ports );
367 /* Initialize a flow with random fields that matter for nx_hash_fields. */
368 void flow_random_hash_fields(struct flow *);
369 void flow_mask_hash_fields(const struct flow *, struct flow_wildcards *,
370 enum nx_hash_fields);
371 uint32_t flow_hash_fields(const struct flow *, enum nx_hash_fields,
373 const char *flow_hash_fields_to_str(enum nx_hash_fields);
374 bool flow_hash_fields_valid(enum nx_hash_fields);
376 uint32_t flow_hash_in_wildcards(const struct flow *,
377 const struct flow_wildcards *,
380 bool flow_equal_except(const struct flow *a, const struct flow *b,
381 const struct flow_wildcards *);
383 /* Compressed flow. */
385 /* Check that all tunnel fields fit into a single map. */
386 BUILD_ASSERT_DECL(FLOW_TNL_U64S <= 64);
388 /* Check that all non-tunnel fields fit into a single map. */
389 BUILD_ASSERT_DECL(FLOW_U64S - FLOW_TNL_U64S <= 64);
391 /* A sparse representation of a "struct flow".
393 * A "struct flow" is fairly large and tends to be mostly zeros. Sparse
394 * representation has two advantages. First, it saves memory and, more
395 * importantly, minimizes the number of accessed cache lines. Second, it saves
396 * time when the goal is to iterate over only the nonzero parts of the struct.
398 * The map members hold one bit for each uint64_t in a "struct flow". Each
399 * 0-bit indicates that the corresponding uint64_t is zero, each 1-bit that it
400 * *may* be nonzero (see below how this applies to minimasks).
402 * The values indicated by 'tnl_map' and 'pkt_map' always follow the miniflow
403 * in memory. The user of the miniflow is responsible for always having enough
404 * storage after the struct miniflow corresponding to the number of 1-bits in
407 * Elements in values array are allowed to be zero. This is useful for "struct
408 * minimatch", for which ensuring that the miniflow and minimask members have
409 * same maps allows optimization. This allowance applies only to a miniflow
410 * that is not a mask. That is, a minimask may NOT have zero elements in its
413 * A miniflow is always dynamically allocated so that the maps are followed by
414 * at least as many elements as there are 1-bits in maps. */
419 * uint64_t values[n];
420 * where 'n' is miniflow_n_values(miniflow). */
422 BUILD_ASSERT_DECL(sizeof(struct miniflow) == 2 * sizeof(uint64_t));
424 #define MINIFLOW_VALUES_SIZE(COUNT) ((COUNT) * sizeof(uint64_t))
426 static inline uint64_t *miniflow_values(struct miniflow *mf)
428 return (uint64_t *)(mf + 1);
431 static inline const uint64_t *miniflow_get_values(const struct miniflow *mf)
433 return (const uint64_t *)(mf + 1);
438 /* The 'dst' must follow with buffer space for FLOW_U64S 64-bit units.
439 * 'dst->map' is ignored on input and set on output to indicate which fields
441 void miniflow_extract(struct dp_packet *packet, struct miniflow *dst);
442 void miniflow_map_init(struct miniflow *, const struct flow *);
443 void flow_wc_map(const struct flow *, struct miniflow *);
444 size_t miniflow_alloc(struct miniflow *dsts[], size_t n,
445 const struct miniflow *src);
446 void miniflow_init(struct miniflow *, const struct flow *);
447 void miniflow_clone(struct miniflow *, const struct miniflow *,
449 struct miniflow * miniflow_create(const struct flow *);
451 void miniflow_expand(const struct miniflow *, struct flow *);
453 static inline uint64_t flow_u64_value(const struct flow *flow, size_t index)
455 return ((uint64_t *)flow)[index];
458 static inline uint64_t *flow_u64_lvalue(struct flow *flow, size_t index)
460 return &((uint64_t *)flow)[index];
464 miniflow_n_values(const struct miniflow *flow)
466 return count_1bits(flow->tnl_map) + count_1bits(flow->pkt_map);
469 struct flow_for_each_in_maps_aux {
470 const uint64_t *values;
471 struct miniflow maps;
474 static inline uint64_t
475 flow_values_get_next_in_map(const uint64_t *values, uint64_t *map)
477 uint64_t value = values[raw_ctz(*map)];
479 *map = zero_rightmost_1bit(*map);
485 flow_values_get_next_in_maps(struct flow_for_each_in_maps_aux *aux,
488 if (aux->maps.tnl_map) {
489 *value = flow_values_get_next_in_map(aux->values, &aux->maps.tnl_map);
492 if (aux->maps.pkt_map) {
493 *value = flow_values_get_next_in_map(aux->values + FLOW_TNL_U64S,
500 /* Iterate through all flow tunnel u64 values specified by 'MAPS'. */
501 #define FLOW_FOR_EACH_IN_MAPS(VALUE, FLOW, MAPS) \
502 for (struct flow_for_each_in_maps_aux aux__ \
503 = { (const uint64_t *)(FLOW), (MAPS) }; \
504 flow_values_get_next_in_maps(&aux__, &(VALUE));)
506 /* Iterate through all struct flow u64 indices specified by 'MAP'. */
507 #define MAP_FOR_EACH_INDEX(U64IDX, MAP) \
508 for (uint64_t map__ = (MAP); \
509 map__ && ((U64IDX) = raw_ctz(map__), true); \
510 map__ = zero_rightmost_1bit(map__))
512 /* Iterate through all struct flow u64 indices specified by 'MAPS'. */
513 #define MAPS_FOR_EACH_INDEX(U64IDX, MAPS) \
514 for (struct miniflow maps__ = (MAPS); \
516 ? ((U64IDX) = raw_ctz(maps__.tnl_map), \
517 maps__.tnl_map = zero_rightmost_1bit(maps__.tnl_map), \
519 : (maps__.pkt_map && \
520 ((U64IDX) = FLOW_TNL_U64S + raw_ctz(maps__.pkt_map), \
521 maps__.pkt_map = zero_rightmost_1bit(maps__.pkt_map), \
524 #define FLOW_U64_SIZE(FIELD) \
525 DIV_ROUND_UP(sizeof(((struct flow *)0)->FIELD), sizeof(uint64_t))
527 #define MINIFLOW_TNL_MAP__(FIELD, LEN) \
528 (((UINT64_C(1) << DIV_ROUND_UP(LEN, sizeof(uint64_t))) - 1) \
529 << (offsetof(struct flow, FIELD) / sizeof(uint64_t)))
531 #define MINIFLOW_TNL_MAP(FIELD) \
532 MINIFLOW_TNL_MAP__(FIELD, sizeof(((struct flow *)0)->FIELD))
533 #define MINIFLOW_PKT_MAP(FIELD) \
534 (((UINT64_C(1) << FLOW_U64_SIZE(FIELD)) - 1) \
535 << ((offsetof(struct flow, FIELD) / sizeof(uint64_t)) - FLOW_TNL_U64S))
537 struct mf_for_each_in_map_aux {
538 const uint64_t *values;
544 mf_get_next_in_map(struct mf_for_each_in_map_aux *aux,
548 uint64_t rm1bit = rightmost_1bit(aux->map);
552 if (aux->fmap & rm1bit) {
553 uint64_t trash = aux->fmap & (rm1bit - 1);
556 /* count_1bits() is fast for systems where speed matters (e.g.,
557 * DPDK), so we don't try avoid using it.
558 * Advance 'aux->values' to point to the value for 'rm1bit'. */
559 aux->values += count_1bits(trash);
561 *value = *aux->values;
570 /* Iterate through miniflow TNL u64 values specified by 'MAPS'. */
571 #define MINIFLOW_FOR_EACH_IN_TNL_MAP(VALUE, FLOW, MAPS) \
572 for (struct mf_for_each_in_map_aux aux__ = \
573 { miniflow_get_values(FLOW), (FLOW)->tnl_map, (MAPS).tnl_map }; \
574 mf_get_next_in_map(&aux__, &(VALUE));)
576 /* Iterate through miniflow PKT u64 values specified by 'MAPS'. */
577 #define MINIFLOW_FOR_EACH_IN_PKT_MAP(VALUE, FLOW, MAPS) \
578 for (struct mf_for_each_in_map_aux aux__ = \
579 { miniflow_get_values(FLOW) + count_1bits((FLOW)->tnl_map), \
580 (FLOW)->pkt_map, (MAPS).pkt_map }; \
581 mf_get_next_in_map(&aux__, &(VALUE));)
583 /* This can be used when it is known that 'u64_idx' is set in 'map'. */
584 static inline const uint64_t *
585 miniflow_values_get__(const uint64_t *values, uint64_t map, size_t u64_idx)
587 return values + count_1bits(map & ((UINT64_C(1) << u64_idx) - 1));
590 /* This can be used when it is known that 'u64_idx' is set in
591 * the map of 'mf'. */
592 static inline const uint64_t *
593 miniflow_get__(const struct miniflow *mf, size_t u64_idx)
595 return OVS_LIKELY(u64_idx >= FLOW_TNL_U64S)
596 ? miniflow_values_get__(miniflow_get_values(mf)
597 + count_1bits(mf->tnl_map),
598 mf->pkt_map, u64_idx - FLOW_TNL_U64S)
599 : miniflow_values_get__(miniflow_get_values(mf), mf->tnl_map, u64_idx);
602 #define MINIFLOW_IN_MAP(MF, U64_IDX) \
603 (OVS_LIKELY(U64_IDX >= FLOW_TNL_U64S) \
604 ? (MF)->pkt_map & (UINT64_C(1) << ((U64_IDX) - FLOW_TNL_U64S)) \
605 : (MF)->tnl_map & (UINT64_C(1) << (U64_IDX)))
607 /* Get the value of 'FIELD' of an up to 8 byte wide integer type 'TYPE' of
609 #define MINIFLOW_GET_TYPE(MF, TYPE, OFS) \
610 (MINIFLOW_IN_MAP(MF, (OFS) / sizeof(uint64_t)) \
611 ? ((OVS_FORCE const TYPE *)miniflow_get__(MF, (OFS) / sizeof(uint64_t))) \
612 [(OFS) % sizeof(uint64_t) / sizeof(TYPE)] \
615 #define MINIFLOW_GET_U8(FLOW, FIELD) \
616 MINIFLOW_GET_TYPE(FLOW, uint8_t, offsetof(struct flow, FIELD))
617 #define MINIFLOW_GET_U16(FLOW, FIELD) \
618 MINIFLOW_GET_TYPE(FLOW, uint16_t, offsetof(struct flow, FIELD))
619 #define MINIFLOW_GET_BE16(FLOW, FIELD) \
620 MINIFLOW_GET_TYPE(FLOW, ovs_be16, offsetof(struct flow, FIELD))
621 #define MINIFLOW_GET_U32(FLOW, FIELD) \
622 MINIFLOW_GET_TYPE(FLOW, uint32_t, offsetof(struct flow, FIELD))
623 #define MINIFLOW_GET_BE32(FLOW, FIELD) \
624 MINIFLOW_GET_TYPE(FLOW, ovs_be32, offsetof(struct flow, FIELD))
625 #define MINIFLOW_GET_U64(FLOW, FIELD) \
626 MINIFLOW_GET_TYPE(FLOW, uint64_t, offsetof(struct flow, FIELD))
627 #define MINIFLOW_GET_BE64(FLOW, FIELD) \
628 MINIFLOW_GET_TYPE(FLOW, ovs_be64, offsetof(struct flow, FIELD))
630 static inline uint64_t miniflow_get(const struct miniflow *,
631 unsigned int u64_ofs);
632 static inline uint32_t miniflow_get_u32(const struct miniflow *,
633 unsigned int u32_ofs);
634 static inline ovs_be32 miniflow_get_be32(const struct miniflow *,
635 unsigned int be32_ofs);
636 static inline uint16_t miniflow_get_vid(const struct miniflow *);
637 static inline uint16_t miniflow_get_tcp_flags(const struct miniflow *);
638 static inline ovs_be64 miniflow_get_metadata(const struct miniflow *);
640 bool miniflow_equal(const struct miniflow *a, const struct miniflow *b);
641 bool miniflow_equal_in_minimask(const struct miniflow *a,
642 const struct miniflow *b,
643 const struct minimask *);
644 bool miniflow_equal_flow_in_minimask(const struct miniflow *a,
645 const struct flow *b,
646 const struct minimask *);
647 uint32_t miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis);
650 /* Compressed flow wildcards. */
652 /* A sparse representation of a "struct flow_wildcards".
654 * See the large comment on struct miniflow for details.
656 * Note: While miniflow can have zero data for a 1-bit in the map,
657 * a minimask may not! We rely on this in the implementation. */
659 struct miniflow masks;
662 void minimask_init(struct minimask *, const struct flow_wildcards *);
663 struct minimask * minimask_create(const struct flow_wildcards *);
664 void minimask_combine(struct minimask *dst,
665 const struct minimask *a, const struct minimask *b,
666 uint64_t storage[FLOW_U64S]);
668 void minimask_expand(const struct minimask *, struct flow_wildcards *);
670 static inline uint32_t minimask_get_u32(const struct minimask *,
671 unsigned int u32_ofs);
672 static inline ovs_be32 minimask_get_be32(const struct minimask *,
673 unsigned int be32_ofs);
674 static inline uint16_t minimask_get_vid_mask(const struct minimask *);
675 static inline ovs_be64 minimask_get_metadata_mask(const struct minimask *);
677 bool minimask_equal(const struct minimask *a, const struct minimask *b);
678 bool minimask_has_extra(const struct minimask *, const struct minimask *);
681 /* Returns true if 'mask' matches every packet, false if 'mask' fixes any bits
684 minimask_is_catchall(const struct minimask *mask)
686 /* For every 1-bit in mask's map, the corresponding value is non-zero,
687 * so the only way the mask can not fix any bits or fields is for the
688 * map the be zero. */
689 return mask->masks.tnl_map == 0 && mask->masks.pkt_map == 0;
692 /* Returns the uint64_t that would be at byte offset '8 * u64_ofs' if 'flow'
693 * were expanded into a "struct flow". */
694 static inline uint64_t miniflow_get(const struct miniflow *flow,
695 unsigned int u64_ofs)
697 return MINIFLOW_IN_MAP(flow, u64_ofs)
698 ? *miniflow_get__(flow, u64_ofs) : 0;
701 static inline uint32_t miniflow_get_u32(const struct miniflow *flow,
702 unsigned int u32_ofs)
704 uint64_t value = miniflow_get(flow, u32_ofs / 2);
707 return (u32_ofs & 1) ? value : value >> 32;
709 return (u32_ofs & 1) ? value >> 32 : value;
713 static inline ovs_be32 miniflow_get_be32(const struct miniflow *flow,
714 unsigned int be32_ofs)
716 return (OVS_FORCE ovs_be32)miniflow_get_u32(flow, be32_ofs);
719 /* Returns the VID within the vlan_tci member of the "struct flow" represented
721 static inline uint16_t
722 miniflow_get_vid(const struct miniflow *flow)
724 ovs_be16 tci = MINIFLOW_GET_BE16(flow, vlan_tci);
725 return vlan_tci_to_vid(tci);
728 /* Returns the uint32_t that would be at byte offset '4 * u32_ofs' if 'mask'
729 * were expanded into a "struct flow_wildcards". */
730 static inline uint32_t
731 minimask_get_u32(const struct minimask *mask, unsigned int u32_ofs)
733 return miniflow_get_u32(&mask->masks, u32_ofs);
736 static inline ovs_be32
737 minimask_get_be32(const struct minimask *mask, unsigned int be32_ofs)
739 return (OVS_FORCE ovs_be32)minimask_get_u32(mask, be32_ofs);
742 /* Returns the VID mask within the vlan_tci member of the "struct
743 * flow_wildcards" represented by 'mask'. */
744 static inline uint16_t
745 minimask_get_vid_mask(const struct minimask *mask)
747 return miniflow_get_vid(&mask->masks);
750 /* Returns the value of the "tcp_flags" field in 'flow'. */
751 static inline uint16_t
752 miniflow_get_tcp_flags(const struct miniflow *flow)
754 return ntohs(MINIFLOW_GET_BE16(flow, tcp_flags));
757 /* Returns the value of the OpenFlow 1.1+ "metadata" field in 'flow'. */
758 static inline ovs_be64
759 miniflow_get_metadata(const struct miniflow *flow)
761 return MINIFLOW_GET_BE64(flow, metadata);
764 /* Returns the mask for the OpenFlow 1.1+ "metadata" field in 'mask'.
766 * The return value is all-1-bits if 'mask' matches on the whole value of the
767 * metadata field, all-0-bits if 'mask' entirely wildcards the metadata field,
768 * or some other value if the metadata field is partially matched, partially
770 static inline ovs_be64
771 minimask_get_metadata_mask(const struct minimask *mask)
773 return MINIFLOW_GET_BE64(&mask->masks, metadata);
776 /* Perform a bitwise OR of miniflow 'src' flow data with the equivalent
777 * fields in 'dst', storing the result in 'dst'. */
779 flow_union_with_miniflow(struct flow *dst, const struct miniflow *src)
781 uint64_t *dst_u64 = (uint64_t *) dst;
782 const uint64_t *p = miniflow_get_values(src);
785 MAP_FOR_EACH_INDEX(idx, src->tnl_map) {
786 dst_u64[idx] |= *p++;
788 dst_u64 += FLOW_TNL_U64S;
789 MAP_FOR_EACH_INDEX(idx, src->pkt_map) {
790 dst_u64[idx] |= *p++;
795 pkt_metadata_from_flow(struct pkt_metadata *md, const struct flow *flow)
797 md->recirc_id = flow->recirc_id;
798 md->dp_hash = flow->dp_hash;
799 md->tunnel = flow->tunnel;
800 md->skb_priority = flow->skb_priority;
801 md->pkt_mark = flow->pkt_mark;
802 md->in_port = flow->in_port;
805 static inline bool is_ip_any(const struct flow *flow)
807 return dl_type_is_ip_any(flow->dl_type);
810 static inline bool is_icmpv4(const struct flow *flow)
812 return (flow->dl_type == htons(ETH_TYPE_IP)
813 && flow->nw_proto == IPPROTO_ICMP);
816 static inline bool is_icmpv6(const struct flow *flow)
818 return (flow->dl_type == htons(ETH_TYPE_IPV6)
819 && flow->nw_proto == IPPROTO_ICMPV6);
822 static inline bool is_igmp(const struct flow *flow)
824 return (flow->dl_type == htons(ETH_TYPE_IP)
825 && flow->nw_proto == IPPROTO_IGMP);
828 static inline bool is_mld(const struct flow *flow)
830 return is_icmpv6(flow)
831 && (flow->tp_src == htons(MLD_QUERY)
832 || flow->tp_src == htons(MLD_REPORT)
833 || flow->tp_src == htons(MLD_DONE)
834 || flow->tp_src == htons(MLD2_REPORT));
837 static inline bool is_mld_query(const struct flow *flow)
839 return is_icmpv6(flow) && flow->tp_src == htons(MLD_QUERY);
842 static inline bool is_mld_report(const struct flow *flow)
844 return is_mld(flow) && !is_mld_query(flow);
847 static inline bool is_stp(const struct flow *flow)
849 return (eth_addr_equals(flow->dl_dst, eth_addr_stp)
850 && flow->dl_type == htons(FLOW_DL_TYPE_NONE));