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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>
58 * Flow rule attributes.
60 * Priorities are set on two levels: per group and per rule within groups.
62 * Lower values denote higher priority, the highest priority for both levels
63 * is 0, so that a rule with priority 0 in group 8 is always matched after a
64 * rule with priority 8 in group 0.
66 * Although optional, applications are encouraged to group similar rules as
67 * much as possible to fully take advantage of hardware capabilities
68 * (e.g. optimized matching) and work around limitations (e.g. a single
69 * pattern type possibly allowed in a given group).
71 * Group and priority levels are arbitrary and up to the application, they
72 * do not need to be contiguous nor start from 0, however the maximum number
73 * varies between devices and may be affected by existing flow rules.
75 * If a packet is matched by several rules of a given group for a given
76 * priority level, the outcome is undefined. It can take any path, may be
77 * duplicated or even cause unrecoverable errors.
79 * Note that support for more than a single group and priority level is not
82 * Flow rules can apply to inbound and/or outbound traffic (ingress/egress).
84 * Several pattern items and actions are valid and can be used in both
85 * directions. Those valid for only one direction are described as such.
87 * At least one direction must be specified.
89 * Specifying both directions at once for a given rule is not recommended
90 * but may be valid in a few cases (e.g. shared counter).
92 struct rte_flow_attr {
93 uint32_t group; /**< Priority group. */
94 uint32_t priority; /**< Priority level within group. */
95 uint32_t ingress:1; /**< Rule applies to ingress traffic. */
96 uint32_t egress:1; /**< Rule applies to egress traffic. */
97 uint32_t reserved:30; /**< Reserved, must be zero. */
101 * Matching pattern item types.
103 * Pattern items fall in two categories:
105 * - Matching protocol headers and packet data (ANY, RAW, ETH, VLAN, IPV4,
106 * IPV6, ICMP, UDP, TCP, SCTP, VXLAN and so on), usually associated with a
107 * specification structure. These must be stacked in the same order as the
108 * protocol layers to match, starting from the lowest.
110 * - Matching meta-data or affecting pattern processing (END, VOID, INVERT,
111 * PF, VF, PORT and so on), often without a specification structure. Since
112 * they do not match packet contents, these can be specified anywhere
113 * within item lists without affecting others.
115 * See the description of individual types for more information. Those
116 * marked with [META] fall into the second category.
118 enum rte_flow_item_type {
122 * End marker for item lists. Prevents further processing of items,
123 * thereby ending the pattern.
125 * No associated specification structure.
127 RTE_FLOW_ITEM_TYPE_END,
132 * Used as a placeholder for convenience. It is ignored and simply
135 * No associated specification structure.
137 RTE_FLOW_ITEM_TYPE_VOID,
142 * Inverted matching, i.e. process packets that do not match the
145 * No associated specification structure.
147 RTE_FLOW_ITEM_TYPE_INVERT,
150 * Matches any protocol in place of the current layer, a single ANY
151 * may also stand for several protocol layers.
153 * See struct rte_flow_item_any.
155 RTE_FLOW_ITEM_TYPE_ANY,
160 * Matches packets addressed to the physical function of the device.
162 * If the underlying device function differs from the one that would
163 * normally receive the matched traffic, specifying this item
164 * prevents it from reaching that device unless the flow rule
165 * contains a PF action. Packets are not duplicated between device
166 * instances by default.
168 * No associated specification structure.
170 RTE_FLOW_ITEM_TYPE_PF,
175 * Matches packets addressed to a virtual function ID of the device.
177 * If the underlying device function differs from the one that would
178 * normally receive the matched traffic, specifying this item
179 * prevents it from reaching that device unless the flow rule
180 * contains a VF action. Packets are not duplicated between device
181 * instances by default.
183 * See struct rte_flow_item_vf.
185 RTE_FLOW_ITEM_TYPE_VF,
190 * Matches packets coming from the specified physical port of the
193 * The first PORT item overrides the physical port normally
194 * associated with the specified DPDK input port (port_id). This
195 * item can be provided several times to match additional physical
198 * See struct rte_flow_item_port.
200 RTE_FLOW_ITEM_TYPE_PORT,
203 * Matches a byte string of a given length at a given offset.
205 * See struct rte_flow_item_raw.
207 RTE_FLOW_ITEM_TYPE_RAW,
210 * Matches an Ethernet header.
212 * See struct rte_flow_item_eth.
214 RTE_FLOW_ITEM_TYPE_ETH,
217 * Matches an 802.1Q/ad VLAN tag.
219 * See struct rte_flow_item_vlan.
221 RTE_FLOW_ITEM_TYPE_VLAN,
224 * Matches an IPv4 header.
226 * See struct rte_flow_item_ipv4.
228 RTE_FLOW_ITEM_TYPE_IPV4,
231 * Matches an IPv6 header.
233 * See struct rte_flow_item_ipv6.
235 RTE_FLOW_ITEM_TYPE_IPV6,
238 * Matches an ICMP header.
240 * See struct rte_flow_item_icmp.
242 RTE_FLOW_ITEM_TYPE_ICMP,
245 * Matches a UDP header.
247 * See struct rte_flow_item_udp.
249 RTE_FLOW_ITEM_TYPE_UDP,
252 * Matches a TCP header.
254 * See struct rte_flow_item_tcp.
256 RTE_FLOW_ITEM_TYPE_TCP,
259 * Matches a SCTP header.
261 * See struct rte_flow_item_sctp.
263 RTE_FLOW_ITEM_TYPE_SCTP,
266 * Matches a VXLAN header.
268 * See struct rte_flow_item_vxlan.
270 RTE_FLOW_ITEM_TYPE_VXLAN,
273 * Matches a E_TAG header.
275 * See struct rte_flow_item_e_tag.
277 RTE_FLOW_ITEM_TYPE_E_TAG,
280 * Matches a NVGRE header.
282 * See struct rte_flow_item_nvgre.
284 RTE_FLOW_ITEM_TYPE_NVGRE,
287 * Matches a MPLS header.
289 * See struct rte_flow_item_mpls.
291 RTE_FLOW_ITEM_TYPE_MPLS,
294 * Matches a GRE header.
296 * See struct rte_flow_item_gre.
298 RTE_FLOW_ITEM_TYPE_GRE,
302 * RTE_FLOW_ITEM_TYPE_ANY
304 * Matches any protocol in place of the current layer, a single ANY may also
305 * stand for several protocol layers.
307 * This is usually specified as the first pattern item when looking for a
308 * protocol anywhere in a packet.
310 * A zeroed mask stands for any number of layers.
312 struct rte_flow_item_any {
313 uint32_t num; /**< Number of layers covered. */
316 /** Default mask for RTE_FLOW_ITEM_TYPE_ANY. */
318 static const struct rte_flow_item_any rte_flow_item_any_mask = {
324 * RTE_FLOW_ITEM_TYPE_VF
326 * Matches packets addressed to a virtual function ID of the device.
328 * If the underlying device function differs from the one that would
329 * normally receive the matched traffic, specifying this item prevents it
330 * from reaching that device unless the flow rule contains a VF
331 * action. Packets are not duplicated between device instances by default.
333 * - Likely to return an error or never match any traffic if this causes a
334 * VF device to match traffic addressed to a different VF.
335 * - Can be specified multiple times to match traffic addressed to several
337 * - Can be combined with a PF item to match both PF and VF traffic.
339 * A zeroed mask can be used to match any VF ID.
341 struct rte_flow_item_vf {
342 uint32_t id; /**< Destination VF ID. */
345 /** Default mask for RTE_FLOW_ITEM_TYPE_VF. */
347 static const struct rte_flow_item_vf rte_flow_item_vf_mask = {
353 * RTE_FLOW_ITEM_TYPE_PORT
355 * Matches packets coming from the specified physical port of the underlying
358 * The first PORT item overrides the physical port normally associated with
359 * the specified DPDK input port (port_id). This item can be provided
360 * several times to match additional physical ports.
362 * Note that physical ports are not necessarily tied to DPDK input ports
363 * (port_id) when those are not under DPDK control. Possible values are
364 * specific to each device, they are not necessarily indexed from zero and
365 * may not be contiguous.
367 * As a device property, the list of allowed values as well as the value
368 * associated with a port_id should be retrieved by other means.
370 * A zeroed mask can be used to match any port index.
372 struct rte_flow_item_port {
373 uint32_t index; /**< Physical port index. */
376 /** Default mask for RTE_FLOW_ITEM_TYPE_PORT. */
378 static const struct rte_flow_item_port rte_flow_item_port_mask = {
384 * RTE_FLOW_ITEM_TYPE_RAW
386 * Matches a byte string of a given length at a given offset.
388 * Offset is either absolute (using the start of the packet) or relative to
389 * the end of the previous matched item in the stack, in which case negative
390 * values are allowed.
392 * If search is enabled, offset is used as the starting point. The search
393 * area can be delimited by setting limit to a nonzero value, which is the
394 * maximum number of bytes after offset where the pattern may start.
396 * Matching a zero-length pattern is allowed, doing so resets the relative
397 * offset for subsequent items.
399 * This type does not support ranges (struct rte_flow_item.last).
401 struct rte_flow_item_raw {
402 uint32_t relative:1; /**< Look for pattern after the previous item. */
403 uint32_t search:1; /**< Search pattern from offset (see also limit). */
404 uint32_t reserved:30; /**< Reserved, must be set to zero. */
405 int32_t offset; /**< Absolute or relative offset for pattern. */
406 uint16_t limit; /**< Search area limit for start of pattern. */
407 uint16_t length; /**< Pattern length. */
408 uint8_t pattern[]; /**< Byte string to look for. */
411 /** Default mask for RTE_FLOW_ITEM_TYPE_RAW. */
413 static const struct rte_flow_item_raw rte_flow_item_raw_mask = {
416 .reserved = 0x3fffffff,
417 .offset = 0xffffffff,
424 * RTE_FLOW_ITEM_TYPE_ETH
426 * Matches an Ethernet header.
428 struct rte_flow_item_eth {
429 struct ether_addr dst; /**< Destination MAC. */
430 struct ether_addr src; /**< Source MAC. */
431 uint16_t type; /**< EtherType. */
434 /** Default mask for RTE_FLOW_ITEM_TYPE_ETH. */
436 static const struct rte_flow_item_eth rte_flow_item_eth_mask = {
437 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
438 .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
444 * RTE_FLOW_ITEM_TYPE_VLAN
446 * Matches an 802.1Q/ad VLAN tag.
448 * This type normally follows either RTE_FLOW_ITEM_TYPE_ETH or
449 * RTE_FLOW_ITEM_TYPE_VLAN.
451 struct rte_flow_item_vlan {
452 uint16_t tpid; /**< Tag protocol identifier. */
453 uint16_t tci; /**< Tag control information. */
456 /** Default mask for RTE_FLOW_ITEM_TYPE_VLAN. */
458 static const struct rte_flow_item_vlan rte_flow_item_vlan_mask = {
465 * RTE_FLOW_ITEM_TYPE_IPV4
467 * Matches an IPv4 header.
469 * Note: IPv4 options are handled by dedicated pattern items.
471 struct rte_flow_item_ipv4 {
472 struct ipv4_hdr hdr; /**< IPv4 header definition. */
475 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV4. */
477 static const struct rte_flow_item_ipv4 rte_flow_item_ipv4_mask = {
479 .src_addr = 0xffffffff,
480 .dst_addr = 0xffffffff,
486 * RTE_FLOW_ITEM_TYPE_IPV6.
488 * Matches an IPv6 header.
490 * Note: IPv6 options are handled by dedicated pattern items.
492 struct rte_flow_item_ipv6 {
493 struct ipv6_hdr hdr; /**< IPv6 header definition. */
496 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV6. */
498 static const struct rte_flow_item_ipv6 rte_flow_item_ipv6_mask = {
501 "\xff\xff\xff\xff\xff\xff\xff\xff"
502 "\xff\xff\xff\xff\xff\xff\xff\xff",
504 "\xff\xff\xff\xff\xff\xff\xff\xff"
505 "\xff\xff\xff\xff\xff\xff\xff\xff",
511 * RTE_FLOW_ITEM_TYPE_ICMP.
513 * Matches an ICMP header.
515 struct rte_flow_item_icmp {
516 struct icmp_hdr hdr; /**< ICMP header definition. */
519 /** Default mask for RTE_FLOW_ITEM_TYPE_ICMP. */
521 static const struct rte_flow_item_icmp rte_flow_item_icmp_mask = {
530 * RTE_FLOW_ITEM_TYPE_UDP.
532 * Matches a UDP header.
534 struct rte_flow_item_udp {
535 struct udp_hdr hdr; /**< UDP header definition. */
538 /** Default mask for RTE_FLOW_ITEM_TYPE_UDP. */
540 static const struct rte_flow_item_udp rte_flow_item_udp_mask = {
549 * RTE_FLOW_ITEM_TYPE_TCP.
551 * Matches a TCP header.
553 struct rte_flow_item_tcp {
554 struct tcp_hdr hdr; /**< TCP header definition. */
557 /** Default mask for RTE_FLOW_ITEM_TYPE_TCP. */
559 static const struct rte_flow_item_tcp rte_flow_item_tcp_mask = {
568 * RTE_FLOW_ITEM_TYPE_SCTP.
570 * Matches a SCTP header.
572 struct rte_flow_item_sctp {
573 struct sctp_hdr hdr; /**< SCTP header definition. */
576 /** Default mask for RTE_FLOW_ITEM_TYPE_SCTP. */
578 static const struct rte_flow_item_sctp rte_flow_item_sctp_mask = {
587 * RTE_FLOW_ITEM_TYPE_VXLAN.
589 * Matches a VXLAN header (RFC 7348).
591 struct rte_flow_item_vxlan {
592 uint8_t flags; /**< Normally 0x08 (I flag). */
593 uint8_t rsvd0[3]; /**< Reserved, normally 0x000000. */
594 uint8_t vni[3]; /**< VXLAN identifier. */
595 uint8_t rsvd1; /**< Reserved, normally 0x00. */
598 /** Default mask for RTE_FLOW_ITEM_TYPE_VXLAN. */
600 static const struct rte_flow_item_vxlan rte_flow_item_vxlan_mask = {
601 .vni = "\xff\xff\xff",
606 * RTE_FLOW_ITEM_TYPE_E_TAG.
608 * Matches a E-tag header.
610 struct rte_flow_item_e_tag {
611 uint16_t tpid; /**< Tag protocol identifier (0x893F). */
613 * E-Tag control information (E-TCI).
614 * E-PCP (3b), E-DEI (1b), ingress E-CID base (12b).
616 uint16_t epcp_edei_in_ecid_b;
617 /** Reserved (2b), GRP (2b), E-CID base (12b). */
618 uint16_t rsvd_grp_ecid_b;
619 uint8_t in_ecid_e; /**< Ingress E-CID ext. */
620 uint8_t ecid_e; /**< E-CID ext. */
624 * RTE_FLOW_ITEM_TYPE_NVGRE.
626 * Matches a NVGRE header.
628 struct rte_flow_item_nvgre {
630 * Checksum (1b), undefined (1b), key bit (1b), sequence number (1b),
631 * reserved 0 (9b), version (3b).
633 * c_k_s_rsvd0_ver must have value 0x2000 according to RFC 7637.
635 uint16_t c_k_s_rsvd0_ver;
636 uint16_t protocol; /**< Protocol type (0x6558). */
637 uint8_t tni[3]; /**< Virtual subnet ID. */
638 uint8_t flow_id; /**< Flow ID. */
642 * RTE_FLOW_ITEM_TYPE_MPLS.
644 * Matches a MPLS header.
646 struct rte_flow_item_mpls {
648 * Label (20b), TC (3b), Bottom of Stack (1b).
650 uint8_t label_tc_s[3];
651 uint8_t ttl; /** Time-to-Live. */
654 /** Default mask for RTE_FLOW_ITEM_TYPE_MPLS. */
656 static const struct rte_flow_item_mpls rte_flow_item_mpls_mask = {
657 .label_tc_s = "\xff\xff\xf0",
662 * RTE_FLOW_ITEM_TYPE_GRE.
664 * Matches a GRE header.
666 struct rte_flow_item_gre {
668 * Checksum (1b), reserved 0 (12b), version (3b).
671 uint16_t c_rsvd0_ver;
672 uint16_t protocol; /**< Protocol type. */
675 /** Default mask for RTE_FLOW_ITEM_TYPE_GRE. */
677 static const struct rte_flow_item_gre rte_flow_item_gre_mask = {
683 * Matching pattern item definition.
685 * A pattern is formed by stacking items starting from the lowest protocol
686 * layer to match. This stacking restriction does not apply to meta items
687 * which can be placed anywhere in the stack without affecting the meaning
688 * of the resulting pattern.
690 * Patterns are terminated by END items.
692 * The spec field should be a valid pointer to a structure of the related
693 * item type. It may remain unspecified (NULL) in many cases to request
694 * broad (nonspecific) matching. In such cases, last and mask must also be
697 * Optionally, last can point to a structure of the same type to define an
698 * inclusive range. This is mostly supported by integer and address fields,
699 * may cause errors otherwise. Fields that do not support ranges must be set
700 * to 0 or to the same value as the corresponding fields in spec.
702 * Only the fields defined to nonzero values in the default masks (see
703 * rte_flow_item_{name}_mask constants) are considered relevant by
704 * default. This can be overridden by providing a mask structure of the
705 * same type with applicable bits set to one. It can also be used to
706 * partially filter out specific fields (e.g. as an alternate mean to match
707 * ranges of IP addresses).
709 * Mask is a simple bit-mask applied before interpreting the contents of
710 * spec and last, which may yield unexpected results if not used
711 * carefully. For example, if for an IPv4 address field, spec provides
712 * 10.1.2.3, last provides 10.3.4.5 and mask provides 255.255.0.0, the
713 * effective range becomes 10.1.0.0 to 10.3.255.255.
715 struct rte_flow_item {
716 enum rte_flow_item_type type; /**< Item type. */
717 const void *spec; /**< Pointer to item specification structure. */
718 const void *last; /**< Defines an inclusive range (spec to last). */
719 const void *mask; /**< Bit-mask applied to spec and last. */
725 * Each possible action is represented by a type. Some have associated
726 * configuration structures. Several actions combined in a list can be
727 * affected to a flow rule. That list is not ordered.
729 * They fall in three categories:
731 * - Terminating actions (such as QUEUE, DROP, RSS, PF, VF) that prevent
732 * processing matched packets by subsequent flow rules, unless overridden
735 * - Non terminating actions (PASSTHRU, DUP) that leave matched packets up
736 * for additional processing by subsequent flow rules.
738 * - Other non terminating meta actions that do not affect the fate of
739 * packets (END, VOID, MARK, FLAG, COUNT).
741 * When several actions are combined in a flow rule, they should all have
742 * different types (e.g. dropping a packet twice is not possible).
744 * Only the last action of a given type is taken into account. PMDs still
745 * perform error checking on the entire list.
747 * Note that PASSTHRU is the only action able to override a terminating
750 enum rte_flow_action_type {
754 * End marker for action lists. Prevents further processing of
755 * actions, thereby ending the list.
757 * No associated configuration structure.
759 RTE_FLOW_ACTION_TYPE_END,
764 * Used as a placeholder for convenience. It is ignored and simply
767 * No associated configuration structure.
769 RTE_FLOW_ACTION_TYPE_VOID,
772 * Leaves packets up for additional processing by subsequent flow
773 * rules. This is the default when a rule does not contain a
774 * terminating action, but can be specified to force a rule to
775 * become non-terminating.
777 * No associated configuration structure.
779 RTE_FLOW_ACTION_TYPE_PASSTHRU,
784 * Attaches an integer value to packets and sets PKT_RX_FDIR and
785 * PKT_RX_FDIR_ID mbuf flags.
787 * See struct rte_flow_action_mark.
789 RTE_FLOW_ACTION_TYPE_MARK,
794 * Flags packets. Similar to MARK without a specific value; only
795 * sets the PKT_RX_FDIR mbuf flag.
797 * No associated configuration structure.
799 RTE_FLOW_ACTION_TYPE_FLAG,
802 * Assigns packets to a given queue index.
804 * See struct rte_flow_action_queue.
806 RTE_FLOW_ACTION_TYPE_QUEUE,
811 * PASSTHRU overrides this action if both are specified.
813 * No associated configuration structure.
815 RTE_FLOW_ACTION_TYPE_DROP,
820 * Enables counters for this rule.
822 * These counters can be retrieved and reset through rte_flow_query(),
823 * see struct rte_flow_query_count.
825 * No associated configuration structure.
827 RTE_FLOW_ACTION_TYPE_COUNT,
830 * Duplicates packets to a given queue index.
832 * This is normally combined with QUEUE, however when used alone, it
833 * is actually similar to QUEUE + PASSTHRU.
835 * See struct rte_flow_action_dup.
837 RTE_FLOW_ACTION_TYPE_DUP,
840 * Similar to QUEUE, except RSS is additionally performed on packets
841 * to spread them among several queues according to the provided
844 * See struct rte_flow_action_rss.
846 RTE_FLOW_ACTION_TYPE_RSS,
849 * Redirects packets to the physical function (PF) of the current
852 * No associated configuration structure.
854 RTE_FLOW_ACTION_TYPE_PF,
857 * Redirects packets to the virtual function (VF) of the current
858 * device with the specified ID.
860 * See struct rte_flow_action_vf.
862 RTE_FLOW_ACTION_TYPE_VF,
866 * RTE_FLOW_ACTION_TYPE_MARK
868 * Attaches an integer value to packets and sets PKT_RX_FDIR and
869 * PKT_RX_FDIR_ID mbuf flags.
871 * This value is arbitrary and application-defined. Maximum allowed value
872 * depends on the underlying implementation. It is returned in the
873 * hash.fdir.hi mbuf field.
875 struct rte_flow_action_mark {
876 uint32_t id; /**< Integer value to return with packets. */
880 * RTE_FLOW_ACTION_TYPE_QUEUE
882 * Assign packets to a given queue index.
884 * Terminating by default.
886 struct rte_flow_action_queue {
887 uint16_t index; /**< Queue index to use. */
891 * RTE_FLOW_ACTION_TYPE_COUNT (query)
893 * Query structure to retrieve and reset flow rule counters.
895 struct rte_flow_query_count {
896 uint32_t reset:1; /**< Reset counters after query [in]. */
897 uint32_t hits_set:1; /**< hits field is set [out]. */
898 uint32_t bytes_set:1; /**< bytes field is set [out]. */
899 uint32_t reserved:29; /**< Reserved, must be zero [in, out]. */
900 uint64_t hits; /**< Number of hits for this rule [out]. */
901 uint64_t bytes; /**< Number of bytes through this rule [out]. */
905 * RTE_FLOW_ACTION_TYPE_DUP
907 * Duplicates packets to a given queue index.
909 * This is normally combined with QUEUE, however when used alone, it is
910 * actually similar to QUEUE + PASSTHRU.
912 * Non-terminating by default.
914 struct rte_flow_action_dup {
915 uint16_t index; /**< Queue index to duplicate packets to. */
919 * RTE_FLOW_ACTION_TYPE_RSS
921 * Similar to QUEUE, except RSS is additionally performed on packets to
922 * spread them among several queues according to the provided parameters.
924 * Note: RSS hash result is stored in the hash.rss mbuf field which overlaps
925 * hash.fdir.lo. Since the MARK action sets the hash.fdir.hi field only,
926 * both can be requested simultaneously.
928 * Terminating by default.
930 struct rte_flow_action_rss {
931 const struct rte_eth_rss_conf *rss_conf; /**< RSS parameters. */
932 uint16_t num; /**< Number of entries in queue[]. */
933 uint16_t queue[]; /**< Queues indices to use. */
937 * RTE_FLOW_ACTION_TYPE_VF
939 * Redirects packets to a virtual function (VF) of the current device.
941 * Packets matched by a VF pattern item can be redirected to their original
942 * VF ID instead of the specified one. This parameter may not be available
943 * and is not guaranteed to work properly if the VF part is matched by a
944 * prior flow rule or if packets are not addressed to a VF in the first
947 * Terminating by default.
949 struct rte_flow_action_vf {
950 uint32_t original:1; /**< Use original VF ID if possible. */
951 uint32_t reserved:31; /**< Reserved, must be zero. */
952 uint32_t id; /**< VF ID to redirect packets to. */
956 * Definition of a single action.
958 * A list of actions is terminated by a END action.
960 * For simple actions without a configuration structure, conf remains NULL.
962 struct rte_flow_action {
963 enum rte_flow_action_type type; /**< Action type. */
964 const void *conf; /**< Pointer to action configuration structure. */
968 * Opaque type returned after successfully creating a flow.
970 * This handle can be used to manage and query the related flow (e.g. to
971 * destroy it or retrieve counters).
976 * Verbose error types.
978 * Most of them provide the type of the object referenced by struct
979 * rte_flow_error.cause.
981 enum rte_flow_error_type {
982 RTE_FLOW_ERROR_TYPE_NONE, /**< No error. */
983 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, /**< Cause unspecified. */
984 RTE_FLOW_ERROR_TYPE_HANDLE, /**< Flow rule (handle). */
985 RTE_FLOW_ERROR_TYPE_ATTR_GROUP, /**< Group field. */
986 RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, /**< Priority field. */
987 RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, /**< Ingress field. */
988 RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, /**< Egress field. */
989 RTE_FLOW_ERROR_TYPE_ATTR, /**< Attributes structure. */
990 RTE_FLOW_ERROR_TYPE_ITEM_NUM, /**< Pattern length. */
991 RTE_FLOW_ERROR_TYPE_ITEM, /**< Specific pattern item. */
992 RTE_FLOW_ERROR_TYPE_ACTION_NUM, /**< Number of actions. */
993 RTE_FLOW_ERROR_TYPE_ACTION, /**< Specific action. */
997 * Verbose error structure definition.
999 * This object is normally allocated by applications and set by PMDs, the
1000 * message points to a constant string which does not need to be freed by
1001 * the application, however its pointer can be considered valid only as long
1002 * as its associated DPDK port remains configured. Closing the underlying
1003 * device or unloading the PMD invalidates it.
1005 * Both cause and message may be NULL regardless of the error type.
1007 struct rte_flow_error {
1008 enum rte_flow_error_type type; /**< Cause field and error types. */
1009 const void *cause; /**< Object responsible for the error. */
1010 const char *message; /**< Human-readable error message. */
1014 * Check whether a flow rule can be created on a given port.
1016 * The flow rule is validated for correctness and whether it could be accepted
1017 * by the device given sufficient resources. The rule is checked against the
1018 * current device mode and queue configuration. The flow rule may also
1019 * optionally be validated against existing flow rules and device resources.
1020 * This function has no effect on the target device.
1022 * The returned value is guaranteed to remain valid only as long as no
1023 * successful calls to rte_flow_create() or rte_flow_destroy() are made in
1024 * the meantime and no device parameter affecting flow rules in any way are
1025 * modified, due to possible collisions or resource limitations (although in
1026 * such cases EINVAL should not be returned).
1029 * Port identifier of Ethernet device.
1031 * Flow rule attributes.
1032 * @param[in] pattern
1033 * Pattern specification (list terminated by the END pattern item).
1034 * @param[in] actions
1035 * Associated actions (list terminated by the END action).
1037 * Perform verbose error reporting if not NULL. PMDs initialize this
1038 * structure in case of error only.
1041 * 0 if flow rule is valid and can be created. A negative errno value
1042 * otherwise (rte_errno is also set), the following errors are defined:
1044 * -ENOSYS: underlying device does not support this functionality.
1046 * -EINVAL: unknown or invalid rule specification.
1048 * -ENOTSUP: valid but unsupported rule specification (e.g. partial
1049 * bit-masks are unsupported).
1051 * -EEXIST: collision with an existing rule. Only returned if device
1052 * supports flow rule collision checking and there was a flow rule
1053 * collision. Not receiving this return code is no guarantee that creating
1054 * the rule will not fail due to a collision.
1056 * -ENOMEM: not enough memory to execute the function, or if the device
1057 * supports resource validation, resource limitation on the device.
1059 * -EBUSY: action cannot be performed due to busy device resources, may
1060 * succeed if the affected queues or even the entire port are in a stopped
1061 * state (see rte_eth_dev_rx_queue_stop() and rte_eth_dev_stop()).
1064 rte_flow_validate(uint8_t port_id,
1065 const struct rte_flow_attr *attr,
1066 const struct rte_flow_item pattern[],
1067 const struct rte_flow_action actions[],
1068 struct rte_flow_error *error);
1071 * Create a flow rule on a given port.
1074 * Port identifier of Ethernet device.
1076 * Flow rule attributes.
1077 * @param[in] pattern
1078 * Pattern specification (list terminated by the END pattern item).
1079 * @param[in] actions
1080 * Associated actions (list terminated by the END action).
1082 * Perform verbose error reporting if not NULL. PMDs initialize this
1083 * structure in case of error only.
1086 * A valid handle in case of success, NULL otherwise and rte_errno is set
1087 * to the positive version of one of the error codes defined for
1088 * rte_flow_validate().
1091 rte_flow_create(uint8_t port_id,
1092 const struct rte_flow_attr *attr,
1093 const struct rte_flow_item pattern[],
1094 const struct rte_flow_action actions[],
1095 struct rte_flow_error *error);
1098 * Destroy a flow rule on a given port.
1100 * Failure to destroy a flow rule handle may occur when other flow rules
1101 * depend on it, and destroying it would result in an inconsistent state.
1103 * This function is only guaranteed to succeed if handles are destroyed in
1104 * reverse order of their creation.
1107 * Port identifier of Ethernet device.
1109 * Flow rule handle to destroy.
1111 * Perform verbose error reporting if not NULL. PMDs initialize this
1112 * structure in case of error only.
1115 * 0 on success, a negative errno value otherwise and rte_errno is set.
1118 rte_flow_destroy(uint8_t port_id,
1119 struct rte_flow *flow,
1120 struct rte_flow_error *error);
1123 * Destroy all flow rules associated with a port.
1125 * In the unlikely event of failure, handles are still considered destroyed
1126 * and no longer valid but the port must be assumed to be in an inconsistent
1130 * Port identifier of Ethernet device.
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_flush(uint8_t port_id,
1140 struct rte_flow_error *error);
1143 * Query an existing flow rule.
1145 * This function allows retrieving flow-specific data such as counters.
1146 * Data is gathered by special actions which must be present in the flow
1149 * \see RTE_FLOW_ACTION_TYPE_COUNT
1152 * Port identifier of Ethernet device.
1154 * Flow rule handle to query.
1156 * Action type to query.
1157 * @param[in, out] data
1158 * Pointer to storage for the associated query data type.
1160 * Perform verbose error reporting if not NULL. PMDs initialize this
1161 * structure in case of error only.
1164 * 0 on success, a negative errno value otherwise and rte_errno is set.
1167 rte_flow_query(uint8_t port_id,
1168 struct rte_flow *flow,
1169 enum rte_flow_action_type action,
1171 struct rte_flow_error *error);
1177 #endif /* RTE_FLOW_H_ */