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39 * RTE generic flow API
41 * This interface provides the ability to program packet matching and
42 * associated actions in hardware through flow rules.
46 #include <rte_ether.h>
52 #include <rte_byteorder.h>
59 * Flow rule attributes.
61 * Priorities are set on two levels: per group and per rule within groups.
63 * Lower values denote higher priority, the highest priority for both levels
64 * is 0, so that a rule with priority 0 in group 8 is always matched after a
65 * rule with priority 8 in group 0.
67 * Although optional, applications are encouraged to group similar rules as
68 * much as possible to fully take advantage of hardware capabilities
69 * (e.g. optimized matching) and work around limitations (e.g. a single
70 * pattern type possibly allowed in a given group).
72 * Group and priority levels are arbitrary and up to the application, they
73 * do not need to be contiguous nor start from 0, however the maximum number
74 * varies between devices and may be affected by existing flow rules.
76 * If a packet is matched by several rules of a given group for a given
77 * priority level, the outcome is undefined. It can take any path, may be
78 * duplicated or even cause unrecoverable errors.
80 * Note that support for more than a single group and priority level is not
83 * Flow rules can apply to inbound and/or outbound traffic (ingress/egress).
85 * Several pattern items and actions are valid and can be used in both
86 * directions. Those valid for only one direction are described as such.
88 * At least one direction must be specified.
90 * Specifying both directions at once for a given rule is not recommended
91 * but may be valid in a few cases (e.g. shared counter).
93 struct rte_flow_attr {
94 uint32_t group; /**< Priority group. */
95 uint32_t priority; /**< Priority level within group. */
96 uint32_t ingress:1; /**< Rule applies to ingress traffic. */
97 uint32_t egress:1; /**< Rule applies to egress traffic. */
98 uint32_t reserved:30; /**< Reserved, must be zero. */
102 * Matching pattern item types.
104 * Pattern items fall in two categories:
106 * - Matching protocol headers and packet data (ANY, RAW, ETH, VLAN, IPV4,
107 * IPV6, ICMP, UDP, TCP, SCTP, VXLAN and so on), usually associated with a
108 * specification structure. These must be stacked in the same order as the
109 * protocol layers to match, starting from the lowest.
111 * - Matching meta-data or affecting pattern processing (END, VOID, INVERT,
112 * PF, VF, PORT and so on), often without a specification structure. Since
113 * they do not match packet contents, these can be specified anywhere
114 * within item lists without affecting others.
116 * See the description of individual types for more information. Those
117 * marked with [META] fall into the second category.
119 enum rte_flow_item_type {
123 * End marker for item lists. Prevents further processing of items,
124 * thereby ending the pattern.
126 * No associated specification structure.
128 RTE_FLOW_ITEM_TYPE_END,
133 * Used as a placeholder for convenience. It is ignored and simply
136 * No associated specification structure.
138 RTE_FLOW_ITEM_TYPE_VOID,
143 * Inverted matching, i.e. process packets that do not match the
146 * No associated specification structure.
148 RTE_FLOW_ITEM_TYPE_INVERT,
151 * Matches any protocol in place of the current layer, a single ANY
152 * may also stand for several protocol layers.
154 * See struct rte_flow_item_any.
156 RTE_FLOW_ITEM_TYPE_ANY,
161 * Matches packets addressed to the physical function of the device.
163 * If the underlying device function differs from the one that would
164 * normally receive the matched traffic, specifying this item
165 * prevents it from reaching that device unless the flow rule
166 * contains a PF action. Packets are not duplicated between device
167 * instances by default.
169 * No associated specification structure.
171 RTE_FLOW_ITEM_TYPE_PF,
176 * Matches packets addressed to a virtual function ID of the device.
178 * If the underlying device function differs from the one that would
179 * normally receive the matched traffic, specifying this item
180 * prevents it from reaching that device unless the flow rule
181 * contains a VF action. Packets are not duplicated between device
182 * instances by default.
184 * See struct rte_flow_item_vf.
186 RTE_FLOW_ITEM_TYPE_VF,
191 * Matches packets coming from the specified physical port of the
194 * The first PORT item overrides the physical port normally
195 * associated with the specified DPDK input port (port_id). This
196 * item can be provided several times to match additional physical
199 * See struct rte_flow_item_port.
201 RTE_FLOW_ITEM_TYPE_PORT,
204 * Matches a byte string of a given length at a given offset.
206 * See struct rte_flow_item_raw.
208 RTE_FLOW_ITEM_TYPE_RAW,
211 * Matches an Ethernet header.
213 * See struct rte_flow_item_eth.
215 RTE_FLOW_ITEM_TYPE_ETH,
218 * Matches an 802.1Q/ad VLAN tag.
220 * See struct rte_flow_item_vlan.
222 RTE_FLOW_ITEM_TYPE_VLAN,
225 * Matches an IPv4 header.
227 * See struct rte_flow_item_ipv4.
229 RTE_FLOW_ITEM_TYPE_IPV4,
232 * Matches an IPv6 header.
234 * See struct rte_flow_item_ipv6.
236 RTE_FLOW_ITEM_TYPE_IPV6,
239 * Matches an ICMP header.
241 * See struct rte_flow_item_icmp.
243 RTE_FLOW_ITEM_TYPE_ICMP,
246 * Matches a UDP header.
248 * See struct rte_flow_item_udp.
250 RTE_FLOW_ITEM_TYPE_UDP,
253 * Matches a TCP header.
255 * See struct rte_flow_item_tcp.
257 RTE_FLOW_ITEM_TYPE_TCP,
260 * Matches a SCTP header.
262 * See struct rte_flow_item_sctp.
264 RTE_FLOW_ITEM_TYPE_SCTP,
267 * Matches a VXLAN header.
269 * See struct rte_flow_item_vxlan.
271 RTE_FLOW_ITEM_TYPE_VXLAN,
274 * Matches a E_TAG header.
276 * See struct rte_flow_item_e_tag.
278 RTE_FLOW_ITEM_TYPE_E_TAG,
281 * Matches a NVGRE header.
283 * See struct rte_flow_item_nvgre.
285 RTE_FLOW_ITEM_TYPE_NVGRE,
288 * Matches a MPLS header.
290 * See struct rte_flow_item_mpls.
292 RTE_FLOW_ITEM_TYPE_MPLS,
295 * Matches a GRE header.
297 * See struct rte_flow_item_gre.
299 RTE_FLOW_ITEM_TYPE_GRE,
303 * RTE_FLOW_ITEM_TYPE_ANY
305 * Matches any protocol in place of the current layer, a single ANY may also
306 * stand for several protocol layers.
308 * This is usually specified as the first pattern item when looking for a
309 * protocol anywhere in a packet.
311 * A zeroed mask stands for any number of layers.
313 struct rte_flow_item_any {
314 uint32_t num; /**< Number of layers covered. */
317 /** Default mask for RTE_FLOW_ITEM_TYPE_ANY. */
319 static const struct rte_flow_item_any rte_flow_item_any_mask = {
325 * RTE_FLOW_ITEM_TYPE_VF
327 * Matches packets addressed to a virtual function ID of the device.
329 * If the underlying device function differs from the one that would
330 * normally receive the matched traffic, specifying this item prevents it
331 * from reaching that device unless the flow rule contains a VF
332 * action. Packets are not duplicated between device instances by default.
334 * - Likely to return an error or never match any traffic if this causes a
335 * VF device to match traffic addressed to a different VF.
336 * - Can be specified multiple times to match traffic addressed to several
338 * - Can be combined with a PF item to match both PF and VF traffic.
340 * A zeroed mask can be used to match any VF ID.
342 struct rte_flow_item_vf {
343 uint32_t id; /**< Destination VF ID. */
346 /** Default mask for RTE_FLOW_ITEM_TYPE_VF. */
348 static const struct rte_flow_item_vf rte_flow_item_vf_mask = {
354 * RTE_FLOW_ITEM_TYPE_PORT
356 * Matches packets coming from the specified physical port of the underlying
359 * The first PORT item overrides the physical port normally associated with
360 * the specified DPDK input port (port_id). This item can be provided
361 * several times to match additional physical ports.
363 * Note that physical ports are not necessarily tied to DPDK input ports
364 * (port_id) when those are not under DPDK control. Possible values are
365 * specific to each device, they are not necessarily indexed from zero and
366 * may not be contiguous.
368 * As a device property, the list of allowed values as well as the value
369 * associated with a port_id should be retrieved by other means.
371 * A zeroed mask can be used to match any port index.
373 struct rte_flow_item_port {
374 uint32_t index; /**< Physical port index. */
377 /** Default mask for RTE_FLOW_ITEM_TYPE_PORT. */
379 static const struct rte_flow_item_port rte_flow_item_port_mask = {
385 * RTE_FLOW_ITEM_TYPE_RAW
387 * Matches a byte string of a given length at a given offset.
389 * Offset is either absolute (using the start of the packet) or relative to
390 * the end of the previous matched item in the stack, in which case negative
391 * values are allowed.
393 * If search is enabled, offset is used as the starting point. The search
394 * area can be delimited by setting limit to a nonzero value, which is the
395 * maximum number of bytes after offset where the pattern may start.
397 * Matching a zero-length pattern is allowed, doing so resets the relative
398 * offset for subsequent items.
400 * This type does not support ranges (struct rte_flow_item.last).
402 struct rte_flow_item_raw {
403 uint32_t relative:1; /**< Look for pattern after the previous item. */
404 uint32_t search:1; /**< Search pattern from offset (see also limit). */
405 uint32_t reserved:30; /**< Reserved, must be set to zero. */
406 int32_t offset; /**< Absolute or relative offset for pattern. */
407 uint16_t limit; /**< Search area limit for start of pattern. */
408 uint16_t length; /**< Pattern length. */
409 uint8_t pattern[]; /**< Byte string to look for. */
412 /** Default mask for RTE_FLOW_ITEM_TYPE_RAW. */
414 static const struct rte_flow_item_raw rte_flow_item_raw_mask = {
417 .reserved = 0x3fffffff,
418 .offset = 0xffffffff,
425 * RTE_FLOW_ITEM_TYPE_ETH
427 * Matches an Ethernet header.
429 struct rte_flow_item_eth {
430 struct ether_addr dst; /**< Destination MAC. */
431 struct ether_addr src; /**< Source MAC. */
432 uint16_t type; /**< EtherType. */
435 /** Default mask for RTE_FLOW_ITEM_TYPE_ETH. */
437 static const struct rte_flow_item_eth rte_flow_item_eth_mask = {
438 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
439 .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
445 * RTE_FLOW_ITEM_TYPE_VLAN
447 * Matches an 802.1Q/ad VLAN tag.
449 * This type normally follows either RTE_FLOW_ITEM_TYPE_ETH or
450 * RTE_FLOW_ITEM_TYPE_VLAN.
452 struct rte_flow_item_vlan {
453 uint16_t tpid; /**< Tag protocol identifier. */
454 uint16_t tci; /**< Tag control information. */
457 /** Default mask for RTE_FLOW_ITEM_TYPE_VLAN. */
459 static const struct rte_flow_item_vlan rte_flow_item_vlan_mask = {
466 * RTE_FLOW_ITEM_TYPE_IPV4
468 * Matches an IPv4 header.
470 * Note: IPv4 options are handled by dedicated pattern items.
472 struct rte_flow_item_ipv4 {
473 struct ipv4_hdr hdr; /**< IPv4 header definition. */
476 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV4. */
478 static const struct rte_flow_item_ipv4 rte_flow_item_ipv4_mask = {
480 .src_addr = 0xffffffff,
481 .dst_addr = 0xffffffff,
487 * RTE_FLOW_ITEM_TYPE_IPV6.
489 * Matches an IPv6 header.
491 * Note: IPv6 options are handled by dedicated pattern items.
493 struct rte_flow_item_ipv6 {
494 struct ipv6_hdr hdr; /**< IPv6 header definition. */
497 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV6. */
499 static const struct rte_flow_item_ipv6 rte_flow_item_ipv6_mask = {
502 "\xff\xff\xff\xff\xff\xff\xff\xff"
503 "\xff\xff\xff\xff\xff\xff\xff\xff",
505 "\xff\xff\xff\xff\xff\xff\xff\xff"
506 "\xff\xff\xff\xff\xff\xff\xff\xff",
512 * RTE_FLOW_ITEM_TYPE_ICMP.
514 * Matches an ICMP header.
516 struct rte_flow_item_icmp {
517 struct icmp_hdr hdr; /**< ICMP header definition. */
520 /** Default mask for RTE_FLOW_ITEM_TYPE_ICMP. */
522 static const struct rte_flow_item_icmp rte_flow_item_icmp_mask = {
531 * RTE_FLOW_ITEM_TYPE_UDP.
533 * Matches a UDP header.
535 struct rte_flow_item_udp {
536 struct udp_hdr hdr; /**< UDP header definition. */
539 /** Default mask for RTE_FLOW_ITEM_TYPE_UDP. */
541 static const struct rte_flow_item_udp rte_flow_item_udp_mask = {
550 * RTE_FLOW_ITEM_TYPE_TCP.
552 * Matches a TCP header.
554 struct rte_flow_item_tcp {
555 struct tcp_hdr hdr; /**< TCP header definition. */
558 /** Default mask for RTE_FLOW_ITEM_TYPE_TCP. */
560 static const struct rte_flow_item_tcp rte_flow_item_tcp_mask = {
569 * RTE_FLOW_ITEM_TYPE_SCTP.
571 * Matches a SCTP header.
573 struct rte_flow_item_sctp {
574 struct sctp_hdr hdr; /**< SCTP header definition. */
577 /** Default mask for RTE_FLOW_ITEM_TYPE_SCTP. */
579 static const struct rte_flow_item_sctp rte_flow_item_sctp_mask = {
588 * RTE_FLOW_ITEM_TYPE_VXLAN.
590 * Matches a VXLAN header (RFC 7348).
592 struct rte_flow_item_vxlan {
593 uint8_t flags; /**< Normally 0x08 (I flag). */
594 uint8_t rsvd0[3]; /**< Reserved, normally 0x000000. */
595 uint8_t vni[3]; /**< VXLAN identifier. */
596 uint8_t rsvd1; /**< Reserved, normally 0x00. */
599 /** Default mask for RTE_FLOW_ITEM_TYPE_VXLAN. */
601 static const struct rte_flow_item_vxlan rte_flow_item_vxlan_mask = {
602 .vni = "\xff\xff\xff",
607 * RTE_FLOW_ITEM_TYPE_E_TAG.
609 * Matches a E-tag header.
611 struct rte_flow_item_e_tag {
612 uint16_t tpid; /**< Tag protocol identifier (0x893F). */
614 * E-Tag control information (E-TCI).
615 * E-PCP (3b), E-DEI (1b), ingress E-CID base (12b).
617 uint16_t epcp_edei_in_ecid_b;
618 /** Reserved (2b), GRP (2b), E-CID base (12b). */
619 uint16_t rsvd_grp_ecid_b;
620 uint8_t in_ecid_e; /**< Ingress E-CID ext. */
621 uint8_t ecid_e; /**< E-CID ext. */
624 /** Default mask for RTE_FLOW_ITEM_TYPE_E_TAG. */
626 static const struct rte_flow_item_e_tag rte_flow_item_e_tag_mask = {
627 #if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
628 .rsvd_grp_ecid_b = 0x3fff,
629 #elif RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
630 .rsvd_grp_ecid_b = 0xff3f,
632 #error Unsupported endianness.
638 * RTE_FLOW_ITEM_TYPE_NVGRE.
640 * Matches a NVGRE header.
642 struct rte_flow_item_nvgre {
644 * Checksum (1b), undefined (1b), key bit (1b), sequence number (1b),
645 * reserved 0 (9b), version (3b).
647 * c_k_s_rsvd0_ver must have value 0x2000 according to RFC 7637.
649 uint16_t c_k_s_rsvd0_ver;
650 uint16_t protocol; /**< Protocol type (0x6558). */
651 uint8_t tni[3]; /**< Virtual subnet ID. */
652 uint8_t flow_id; /**< Flow ID. */
655 /** Default mask for RTE_FLOW_ITEM_TYPE_NVGRE. */
657 static const struct rte_flow_item_nvgre rte_flow_item_nvgre_mask = {
658 .tni = "\xff\xff\xff",
663 * RTE_FLOW_ITEM_TYPE_MPLS.
665 * Matches a MPLS header.
667 struct rte_flow_item_mpls {
669 * Label (20b), TC (3b), Bottom of Stack (1b).
671 uint8_t label_tc_s[3];
672 uint8_t ttl; /** Time-to-Live. */
675 /** Default mask for RTE_FLOW_ITEM_TYPE_MPLS. */
677 static const struct rte_flow_item_mpls rte_flow_item_mpls_mask = {
678 .label_tc_s = "\xff\xff\xf0",
683 * RTE_FLOW_ITEM_TYPE_GRE.
685 * Matches a GRE header.
687 struct rte_flow_item_gre {
689 * Checksum (1b), reserved 0 (12b), version (3b).
692 uint16_t c_rsvd0_ver;
693 uint16_t protocol; /**< Protocol type. */
696 /** Default mask for RTE_FLOW_ITEM_TYPE_GRE. */
698 static const struct rte_flow_item_gre rte_flow_item_gre_mask = {
704 * Matching pattern item definition.
706 * A pattern is formed by stacking items starting from the lowest protocol
707 * layer to match. This stacking restriction does not apply to meta items
708 * which can be placed anywhere in the stack without affecting the meaning
709 * of the resulting pattern.
711 * Patterns are terminated by END items.
713 * The spec field should be a valid pointer to a structure of the related
714 * item type. It may remain unspecified (NULL) in many cases to request
715 * broad (nonspecific) matching. In such cases, last and mask must also be
718 * Optionally, last can point to a structure of the same type to define an
719 * inclusive range. This is mostly supported by integer and address fields,
720 * may cause errors otherwise. Fields that do not support ranges must be set
721 * to 0 or to the same value as the corresponding fields in spec.
723 * Only the fields defined to nonzero values in the default masks (see
724 * rte_flow_item_{name}_mask constants) are considered relevant by
725 * default. This can be overridden by providing a mask structure of the
726 * same type with applicable bits set to one. It can also be used to
727 * partially filter out specific fields (e.g. as an alternate mean to match
728 * ranges of IP addresses).
730 * Mask is a simple bit-mask applied before interpreting the contents of
731 * spec and last, which may yield unexpected results if not used
732 * carefully. For example, if for an IPv4 address field, spec provides
733 * 10.1.2.3, last provides 10.3.4.5 and mask provides 255.255.0.0, the
734 * effective range becomes 10.1.0.0 to 10.3.255.255.
736 struct rte_flow_item {
737 enum rte_flow_item_type type; /**< Item type. */
738 const void *spec; /**< Pointer to item specification structure. */
739 const void *last; /**< Defines an inclusive range (spec to last). */
740 const void *mask; /**< Bit-mask applied to spec and last. */
746 * Each possible action is represented by a type. Some have associated
747 * configuration structures. Several actions combined in a list can be
748 * affected to a flow rule. That list is not ordered.
750 * They fall in three categories:
752 * - Terminating actions (such as QUEUE, DROP, RSS, PF, VF) that prevent
753 * processing matched packets by subsequent flow rules, unless overridden
756 * - Non terminating actions (PASSTHRU, DUP) that leave matched packets up
757 * for additional processing by subsequent flow rules.
759 * - Other non terminating meta actions that do not affect the fate of
760 * packets (END, VOID, MARK, FLAG, COUNT).
762 * When several actions are combined in a flow rule, they should all have
763 * different types (e.g. dropping a packet twice is not possible).
765 * Only the last action of a given type is taken into account. PMDs still
766 * perform error checking on the entire list.
768 * Note that PASSTHRU is the only action able to override a terminating
771 enum rte_flow_action_type {
775 * End marker for action lists. Prevents further processing of
776 * actions, thereby ending the list.
778 * No associated configuration structure.
780 RTE_FLOW_ACTION_TYPE_END,
785 * Used as a placeholder for convenience. It is ignored and simply
788 * No associated configuration structure.
790 RTE_FLOW_ACTION_TYPE_VOID,
793 * Leaves packets up for additional processing by subsequent flow
794 * rules. This is the default when a rule does not contain a
795 * terminating action, but can be specified to force a rule to
796 * become non-terminating.
798 * No associated configuration structure.
800 RTE_FLOW_ACTION_TYPE_PASSTHRU,
805 * Attaches an integer value to packets and sets PKT_RX_FDIR and
806 * PKT_RX_FDIR_ID mbuf flags.
808 * See struct rte_flow_action_mark.
810 RTE_FLOW_ACTION_TYPE_MARK,
815 * Flags packets. Similar to MARK without a specific value; only
816 * sets the PKT_RX_FDIR mbuf flag.
818 * No associated configuration structure.
820 RTE_FLOW_ACTION_TYPE_FLAG,
823 * Assigns packets to a given queue index.
825 * See struct rte_flow_action_queue.
827 RTE_FLOW_ACTION_TYPE_QUEUE,
832 * PASSTHRU overrides this action if both are specified.
834 * No associated configuration structure.
836 RTE_FLOW_ACTION_TYPE_DROP,
841 * Enables counters for this rule.
843 * These counters can be retrieved and reset through rte_flow_query(),
844 * see struct rte_flow_query_count.
846 * No associated configuration structure.
848 RTE_FLOW_ACTION_TYPE_COUNT,
851 * Duplicates packets to a given queue index.
853 * This is normally combined with QUEUE, however when used alone, it
854 * is actually similar to QUEUE + PASSTHRU.
856 * See struct rte_flow_action_dup.
858 RTE_FLOW_ACTION_TYPE_DUP,
861 * Similar to QUEUE, except RSS is additionally performed on packets
862 * to spread them among several queues according to the provided
865 * See struct rte_flow_action_rss.
867 RTE_FLOW_ACTION_TYPE_RSS,
870 * Redirects packets to the physical function (PF) of the current
873 * No associated configuration structure.
875 RTE_FLOW_ACTION_TYPE_PF,
878 * Redirects packets to the virtual function (VF) of the current
879 * device with the specified ID.
881 * See struct rte_flow_action_vf.
883 RTE_FLOW_ACTION_TYPE_VF,
887 * RTE_FLOW_ACTION_TYPE_MARK
889 * Attaches an integer value to packets and sets PKT_RX_FDIR and
890 * PKT_RX_FDIR_ID mbuf flags.
892 * This value is arbitrary and application-defined. Maximum allowed value
893 * depends on the underlying implementation. It is returned in the
894 * hash.fdir.hi mbuf field.
896 struct rte_flow_action_mark {
897 uint32_t id; /**< Integer value to return with packets. */
901 * RTE_FLOW_ACTION_TYPE_QUEUE
903 * Assign packets to a given queue index.
905 * Terminating by default.
907 struct rte_flow_action_queue {
908 uint16_t index; /**< Queue index to use. */
912 * RTE_FLOW_ACTION_TYPE_COUNT (query)
914 * Query structure to retrieve and reset flow rule counters.
916 struct rte_flow_query_count {
917 uint32_t reset:1; /**< Reset counters after query [in]. */
918 uint32_t hits_set:1; /**< hits field is set [out]. */
919 uint32_t bytes_set:1; /**< bytes field is set [out]. */
920 uint32_t reserved:29; /**< Reserved, must be zero [in, out]. */
921 uint64_t hits; /**< Number of hits for this rule [out]. */
922 uint64_t bytes; /**< Number of bytes through this rule [out]. */
926 * RTE_FLOW_ACTION_TYPE_DUP
928 * Duplicates packets to a given queue index.
930 * This is normally combined with QUEUE, however when used alone, it is
931 * actually similar to QUEUE + PASSTHRU.
933 * Non-terminating by default.
935 struct rte_flow_action_dup {
936 uint16_t index; /**< Queue index to duplicate packets to. */
940 * RTE_FLOW_ACTION_TYPE_RSS
942 * Similar to QUEUE, except RSS is additionally performed on packets to
943 * spread them among several queues according to the provided parameters.
945 * Note: RSS hash result is stored in the hash.rss mbuf field which overlaps
946 * hash.fdir.lo. Since the MARK action sets the hash.fdir.hi field only,
947 * both can be requested simultaneously.
949 * Terminating by default.
951 struct rte_flow_action_rss {
952 const struct rte_eth_rss_conf *rss_conf; /**< RSS parameters. */
953 uint16_t num; /**< Number of entries in queue[]. */
954 uint16_t queue[]; /**< Queues indices to use. */
958 * RTE_FLOW_ACTION_TYPE_VF
960 * Redirects packets to a virtual function (VF) of the current device.
962 * Packets matched by a VF pattern item can be redirected to their original
963 * VF ID instead of the specified one. This parameter may not be available
964 * and is not guaranteed to work properly if the VF part is matched by a
965 * prior flow rule or if packets are not addressed to a VF in the first
968 * Terminating by default.
970 struct rte_flow_action_vf {
971 uint32_t original:1; /**< Use original VF ID if possible. */
972 uint32_t reserved:31; /**< Reserved, must be zero. */
973 uint32_t id; /**< VF ID to redirect packets to. */
977 * Definition of a single action.
979 * A list of actions is terminated by a END action.
981 * For simple actions without a configuration structure, conf remains NULL.
983 struct rte_flow_action {
984 enum rte_flow_action_type type; /**< Action type. */
985 const void *conf; /**< Pointer to action configuration structure. */
989 * Opaque type returned after successfully creating a flow.
991 * This handle can be used to manage and query the related flow (e.g. to
992 * destroy it or retrieve counters).
997 * Verbose error types.
999 * Most of them provide the type of the object referenced by struct
1000 * rte_flow_error.cause.
1002 enum rte_flow_error_type {
1003 RTE_FLOW_ERROR_TYPE_NONE, /**< No error. */
1004 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, /**< Cause unspecified. */
1005 RTE_FLOW_ERROR_TYPE_HANDLE, /**< Flow rule (handle). */
1006 RTE_FLOW_ERROR_TYPE_ATTR_GROUP, /**< Group field. */
1007 RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, /**< Priority field. */
1008 RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, /**< Ingress field. */
1009 RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, /**< Egress field. */
1010 RTE_FLOW_ERROR_TYPE_ATTR, /**< Attributes structure. */
1011 RTE_FLOW_ERROR_TYPE_ITEM_NUM, /**< Pattern length. */
1012 RTE_FLOW_ERROR_TYPE_ITEM, /**< Specific pattern item. */
1013 RTE_FLOW_ERROR_TYPE_ACTION_NUM, /**< Number of actions. */
1014 RTE_FLOW_ERROR_TYPE_ACTION, /**< Specific action. */
1018 * Verbose error structure definition.
1020 * This object is normally allocated by applications and set by PMDs, the
1021 * message points to a constant string which does not need to be freed by
1022 * the application, however its pointer can be considered valid only as long
1023 * as its associated DPDK port remains configured. Closing the underlying
1024 * device or unloading the PMD invalidates it.
1026 * Both cause and message may be NULL regardless of the error type.
1028 struct rte_flow_error {
1029 enum rte_flow_error_type type; /**< Cause field and error types. */
1030 const void *cause; /**< Object responsible for the error. */
1031 const char *message; /**< Human-readable error message. */
1035 * Check whether a flow rule can be created on a given port.
1037 * The flow rule is validated for correctness and whether it could be accepted
1038 * by the device given sufficient resources. The rule is checked against the
1039 * current device mode and queue configuration. The flow rule may also
1040 * optionally be validated against existing flow rules and device resources.
1041 * This function has no effect on the target device.
1043 * The returned value is guaranteed to remain valid only as long as no
1044 * successful calls to rte_flow_create() or rte_flow_destroy() are made in
1045 * the meantime and no device parameter affecting flow rules in any way are
1046 * modified, due to possible collisions or resource limitations (although in
1047 * such cases EINVAL should not be returned).
1050 * Port identifier of Ethernet device.
1052 * Flow rule attributes.
1053 * @param[in] pattern
1054 * Pattern specification (list terminated by the END pattern item).
1055 * @param[in] actions
1056 * Associated actions (list terminated by the END action).
1058 * Perform verbose error reporting if not NULL. PMDs initialize this
1059 * structure in case of error only.
1062 * 0 if flow rule is valid and can be created. A negative errno value
1063 * otherwise (rte_errno is also set), the following errors are defined:
1065 * -ENOSYS: underlying device does not support this functionality.
1067 * -EINVAL: unknown or invalid rule specification.
1069 * -ENOTSUP: valid but unsupported rule specification (e.g. partial
1070 * bit-masks are unsupported).
1072 * -EEXIST: collision with an existing rule. Only returned if device
1073 * supports flow rule collision checking and there was a flow rule
1074 * collision. Not receiving this return code is no guarantee that creating
1075 * the rule will not fail due to a collision.
1077 * -ENOMEM: not enough memory to execute the function, or if the device
1078 * supports resource validation, resource limitation on the device.
1080 * -EBUSY: action cannot be performed due to busy device resources, may
1081 * succeed if the affected queues or even the entire port are in a stopped
1082 * state (see rte_eth_dev_rx_queue_stop() and rte_eth_dev_stop()).
1085 rte_flow_validate(uint8_t port_id,
1086 const struct rte_flow_attr *attr,
1087 const struct rte_flow_item pattern[],
1088 const struct rte_flow_action actions[],
1089 struct rte_flow_error *error);
1092 * Create a flow rule on a given port.
1095 * Port identifier of Ethernet device.
1097 * Flow rule attributes.
1098 * @param[in] pattern
1099 * Pattern specification (list terminated by the END pattern item).
1100 * @param[in] actions
1101 * Associated actions (list terminated by the END action).
1103 * Perform verbose error reporting if not NULL. PMDs initialize this
1104 * structure in case of error only.
1107 * A valid handle in case of success, NULL otherwise and rte_errno is set
1108 * to the positive version of one of the error codes defined for
1109 * rte_flow_validate().
1112 rte_flow_create(uint8_t port_id,
1113 const struct rte_flow_attr *attr,
1114 const struct rte_flow_item pattern[],
1115 const struct rte_flow_action actions[],
1116 struct rte_flow_error *error);
1119 * Destroy a flow rule on a given port.
1121 * Failure to destroy a flow rule handle may occur when other flow rules
1122 * depend on it, and destroying it would result in an inconsistent state.
1124 * This function is only guaranteed to succeed if handles are destroyed in
1125 * reverse order of their creation.
1128 * Port identifier of Ethernet device.
1130 * Flow rule handle to destroy.
1132 * Perform verbose error reporting if not NULL. PMDs initialize this
1133 * structure in case of error only.
1136 * 0 on success, a negative errno value otherwise and rte_errno is set.
1139 rte_flow_destroy(uint8_t port_id,
1140 struct rte_flow *flow,
1141 struct rte_flow_error *error);
1144 * Destroy all flow rules associated with a port.
1146 * In the unlikely event of failure, handles are still considered destroyed
1147 * and no longer valid but the port must be assumed to be in an inconsistent
1151 * Port identifier of Ethernet device.
1153 * Perform verbose error reporting if not NULL. PMDs initialize this
1154 * structure in case of error only.
1157 * 0 on success, a negative errno value otherwise and rte_errno is set.
1160 rte_flow_flush(uint8_t port_id,
1161 struct rte_flow_error *error);
1164 * Query an existing flow rule.
1166 * This function allows retrieving flow-specific data such as counters.
1167 * Data is gathered by special actions which must be present in the flow
1170 * \see RTE_FLOW_ACTION_TYPE_COUNT
1173 * Port identifier of Ethernet device.
1175 * Flow rule handle to query.
1177 * Action type to query.
1178 * @param[in, out] data
1179 * Pointer to storage for the associated query data type.
1181 * Perform verbose error reporting if not NULL. PMDs initialize this
1182 * structure in case of error only.
1185 * 0 on success, a negative errno value otherwise and rte_errno is set.
1188 rte_flow_query(uint8_t port_id,
1189 struct rte_flow *flow,
1190 enum rte_flow_action_type action,
1192 struct rte_flow_error *error);
1198 #endif /* RTE_FLOW_H_ */