1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2016 6WIND S.A.
3 * Copyright 2016 Mellanox Technologies, Ltd
11 * RTE generic flow API
13 * This interface provides the ability to program packet matching and
14 * associated actions in hardware through flow rules.
20 #include <rte_ether.h>
26 #include <rte_byteorder.h>
34 * Flow rule attributes.
36 * Priorities are set on two levels: per group and per rule within groups.
38 * Lower values denote higher priority, the highest priority for both levels
39 * is 0, so that a rule with priority 0 in group 8 is always matched after a
40 * rule with priority 8 in group 0.
42 * Although optional, applications are encouraged to group similar rules as
43 * much as possible to fully take advantage of hardware capabilities
44 * (e.g. optimized matching) and work around limitations (e.g. a single
45 * pattern type possibly allowed in a given group).
47 * Group and priority levels are arbitrary and up to the application, they
48 * do not need to be contiguous nor start from 0, however the maximum number
49 * varies between devices and may be affected by existing flow rules.
51 * If a packet is matched by several rules of a given group for a given
52 * priority level, the outcome is undefined. It can take any path, may be
53 * duplicated or even cause unrecoverable errors.
55 * Note that support for more than a single group and priority level is not
58 * Flow rules can apply to inbound and/or outbound traffic (ingress/egress).
60 * Several pattern items and actions are valid and can be used in both
61 * directions. Those valid for only one direction are described as such.
63 * At least one direction must be specified.
65 * Specifying both directions at once for a given rule is not recommended
66 * but may be valid in a few cases (e.g. shared counter).
68 struct rte_flow_attr {
69 uint32_t group; /**< Priority group. */
70 uint32_t priority; /**< Priority level within group. */
71 uint32_t ingress:1; /**< Rule applies to ingress traffic. */
72 uint32_t egress:1; /**< Rule applies to egress traffic. */
73 uint32_t reserved:30; /**< Reserved, must be zero. */
77 * Matching pattern item types.
79 * Pattern items fall in two categories:
81 * - Matching protocol headers and packet data (ANY, RAW, ETH, VLAN, IPV4,
82 * IPV6, ICMP, UDP, TCP, SCTP, VXLAN and so on), usually associated with a
83 * specification structure. These must be stacked in the same order as the
84 * protocol layers to match, starting from the lowest.
86 * - Matching meta-data or affecting pattern processing (END, VOID, INVERT,
87 * PF, VF, PORT and so on), often without a specification structure. Since
88 * they do not match packet contents, these can be specified anywhere
89 * within item lists without affecting others.
91 * See the description of individual types for more information. Those
92 * marked with [META] fall into the second category.
94 enum rte_flow_item_type {
98 * End marker for item lists. Prevents further processing of items,
99 * thereby ending the pattern.
101 * No associated specification structure.
103 RTE_FLOW_ITEM_TYPE_END,
108 * Used as a placeholder for convenience. It is ignored and simply
111 * No associated specification structure.
113 RTE_FLOW_ITEM_TYPE_VOID,
118 * Inverted matching, i.e. process packets that do not match the
121 * No associated specification structure.
123 RTE_FLOW_ITEM_TYPE_INVERT,
126 * Matches any protocol in place of the current layer, a single ANY
127 * may also stand for several protocol layers.
129 * See struct rte_flow_item_any.
131 RTE_FLOW_ITEM_TYPE_ANY,
136 * Matches packets addressed to the physical function of the device.
138 * If the underlying device function differs from the one that would
139 * normally receive the matched traffic, specifying this item
140 * prevents it from reaching that device unless the flow rule
141 * contains a PF action. Packets are not duplicated between device
142 * instances by default.
144 * No associated specification structure.
146 RTE_FLOW_ITEM_TYPE_PF,
151 * Matches packets addressed to a virtual function ID of the device.
153 * If the underlying device function differs from the one that would
154 * normally receive the matched traffic, specifying this item
155 * prevents it from reaching that device unless the flow rule
156 * contains a VF action. Packets are not duplicated between device
157 * instances by default.
159 * See struct rte_flow_item_vf.
161 RTE_FLOW_ITEM_TYPE_VF,
166 * Matches packets coming from the specified physical port of the
169 * The first PORT item overrides the physical port normally
170 * associated with the specified DPDK input port (port_id). This
171 * item can be provided several times to match additional physical
174 * See struct rte_flow_item_port.
176 RTE_FLOW_ITEM_TYPE_PORT,
179 * Matches a byte string of a given length at a given offset.
181 * See struct rte_flow_item_raw.
183 RTE_FLOW_ITEM_TYPE_RAW,
186 * Matches an Ethernet header.
188 * See struct rte_flow_item_eth.
190 RTE_FLOW_ITEM_TYPE_ETH,
193 * Matches an 802.1Q/ad VLAN tag.
195 * See struct rte_flow_item_vlan.
197 RTE_FLOW_ITEM_TYPE_VLAN,
200 * Matches an IPv4 header.
202 * See struct rte_flow_item_ipv4.
204 RTE_FLOW_ITEM_TYPE_IPV4,
207 * Matches an IPv6 header.
209 * See struct rte_flow_item_ipv6.
211 RTE_FLOW_ITEM_TYPE_IPV6,
214 * Matches an ICMP header.
216 * See struct rte_flow_item_icmp.
218 RTE_FLOW_ITEM_TYPE_ICMP,
221 * Matches a UDP header.
223 * See struct rte_flow_item_udp.
225 RTE_FLOW_ITEM_TYPE_UDP,
228 * Matches a TCP header.
230 * See struct rte_flow_item_tcp.
232 RTE_FLOW_ITEM_TYPE_TCP,
235 * Matches a SCTP header.
237 * See struct rte_flow_item_sctp.
239 RTE_FLOW_ITEM_TYPE_SCTP,
242 * Matches a VXLAN header.
244 * See struct rte_flow_item_vxlan.
246 RTE_FLOW_ITEM_TYPE_VXLAN,
249 * Matches a E_TAG header.
251 * See struct rte_flow_item_e_tag.
253 RTE_FLOW_ITEM_TYPE_E_TAG,
256 * Matches a NVGRE header.
258 * See struct rte_flow_item_nvgre.
260 RTE_FLOW_ITEM_TYPE_NVGRE,
263 * Matches a MPLS header.
265 * See struct rte_flow_item_mpls.
267 RTE_FLOW_ITEM_TYPE_MPLS,
270 * Matches a GRE header.
272 * See struct rte_flow_item_gre.
274 RTE_FLOW_ITEM_TYPE_GRE,
279 * Fuzzy pattern match, expect faster than default.
281 * This is for device that support fuzzy matching option.
282 * Usually a fuzzy matching is fast but the cost is accuracy.
284 * See struct rte_flow_item_fuzzy.
286 RTE_FLOW_ITEM_TYPE_FUZZY,
289 * Matches a GTP header.
291 * Configure flow for GTP packets.
293 * See struct rte_flow_item_gtp.
295 RTE_FLOW_ITEM_TYPE_GTP,
298 * Matches a GTP header.
300 * Configure flow for GTP-C packets.
302 * See struct rte_flow_item_gtp.
304 RTE_FLOW_ITEM_TYPE_GTPC,
307 * Matches a GTP header.
309 * Configure flow for GTP-U packets.
311 * See struct rte_flow_item_gtp.
313 RTE_FLOW_ITEM_TYPE_GTPU,
316 * Matches a ESP header.
318 * See struct rte_flow_item_esp.
320 RTE_FLOW_ITEM_TYPE_ESP,
323 * Matches a GENEVE header.
325 * See struct rte_flow_item_geneve.
327 RTE_FLOW_ITEM_TYPE_GENEVE,
331 * RTE_FLOW_ITEM_TYPE_ANY
333 * Matches any protocol in place of the current layer, a single ANY may also
334 * stand for several protocol layers.
336 * This is usually specified as the first pattern item when looking for a
337 * protocol anywhere in a packet.
339 * A zeroed mask stands for any number of layers.
341 struct rte_flow_item_any {
342 uint32_t num; /**< Number of layers covered. */
345 /** Default mask for RTE_FLOW_ITEM_TYPE_ANY. */
347 static const struct rte_flow_item_any rte_flow_item_any_mask = {
353 * RTE_FLOW_ITEM_TYPE_VF
355 * Matches packets addressed to a virtual function ID of the device.
357 * If the underlying device function differs from the one that would
358 * normally receive the matched traffic, specifying this item prevents it
359 * from reaching that device unless the flow rule contains a VF
360 * action. Packets are not duplicated between device instances by default.
362 * - Likely to return an error or never match any traffic if this causes a
363 * VF device to match traffic addressed to a different VF.
364 * - Can be specified multiple times to match traffic addressed to several
366 * - Can be combined with a PF item to match both PF and VF traffic.
368 * A zeroed mask can be used to match any VF ID.
370 struct rte_flow_item_vf {
371 uint32_t id; /**< Destination VF ID. */
374 /** Default mask for RTE_FLOW_ITEM_TYPE_VF. */
376 static const struct rte_flow_item_vf rte_flow_item_vf_mask = {
382 * RTE_FLOW_ITEM_TYPE_PORT
384 * Matches packets coming from the specified physical port of the underlying
387 * The first PORT item overrides the physical port normally associated with
388 * the specified DPDK input port (port_id). This item can be provided
389 * several times to match additional physical ports.
391 * Note that physical ports are not necessarily tied to DPDK input ports
392 * (port_id) when those are not under DPDK control. Possible values are
393 * specific to each device, they are not necessarily indexed from zero and
394 * may not be contiguous.
396 * As a device property, the list of allowed values as well as the value
397 * associated with a port_id should be retrieved by other means.
399 * A zeroed mask can be used to match any port index.
401 struct rte_flow_item_port {
402 uint32_t index; /**< Physical port index. */
405 /** Default mask for RTE_FLOW_ITEM_TYPE_PORT. */
407 static const struct rte_flow_item_port rte_flow_item_port_mask = {
413 * RTE_FLOW_ITEM_TYPE_RAW
415 * Matches a byte string of a given length at a given offset.
417 * Offset is either absolute (using the start of the packet) or relative to
418 * the end of the previous matched item in the stack, in which case negative
419 * values are allowed.
421 * If search is enabled, offset is used as the starting point. The search
422 * area can be delimited by setting limit to a nonzero value, which is the
423 * maximum number of bytes after offset where the pattern may start.
425 * Matching a zero-length pattern is allowed, doing so resets the relative
426 * offset for subsequent items.
428 * This type does not support ranges (struct rte_flow_item.last).
430 struct rte_flow_item_raw {
431 uint32_t relative:1; /**< Look for pattern after the previous item. */
432 uint32_t search:1; /**< Search pattern from offset (see also limit). */
433 uint32_t reserved:30; /**< Reserved, must be set to zero. */
434 int32_t offset; /**< Absolute or relative offset for pattern. */
435 uint16_t limit; /**< Search area limit for start of pattern. */
436 uint16_t length; /**< Pattern length. */
437 uint8_t pattern[]; /**< Byte string to look for. */
440 /** Default mask for RTE_FLOW_ITEM_TYPE_RAW. */
442 static const struct rte_flow_item_raw rte_flow_item_raw_mask = {
445 .reserved = 0x3fffffff,
446 .offset = 0xffffffff,
453 * RTE_FLOW_ITEM_TYPE_ETH
455 * Matches an Ethernet header.
457 struct rte_flow_item_eth {
458 struct ether_addr dst; /**< Destination MAC. */
459 struct ether_addr src; /**< Source MAC. */
460 rte_be16_t type; /**< EtherType. */
463 /** Default mask for RTE_FLOW_ITEM_TYPE_ETH. */
465 static const struct rte_flow_item_eth rte_flow_item_eth_mask = {
466 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
467 .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
468 .type = RTE_BE16(0x0000),
473 * RTE_FLOW_ITEM_TYPE_VLAN
475 * Matches an 802.1Q/ad VLAN tag.
477 * This type normally follows either RTE_FLOW_ITEM_TYPE_ETH or
478 * RTE_FLOW_ITEM_TYPE_VLAN.
480 struct rte_flow_item_vlan {
481 rte_be16_t tpid; /**< Tag protocol identifier. */
482 rte_be16_t tci; /**< Tag control information. */
485 /** Default mask for RTE_FLOW_ITEM_TYPE_VLAN. */
487 static const struct rte_flow_item_vlan rte_flow_item_vlan_mask = {
488 .tpid = RTE_BE16(0x0000),
489 .tci = RTE_BE16(0xffff),
494 * RTE_FLOW_ITEM_TYPE_IPV4
496 * Matches an IPv4 header.
498 * Note: IPv4 options are handled by dedicated pattern items.
500 struct rte_flow_item_ipv4 {
501 struct ipv4_hdr hdr; /**< IPv4 header definition. */
504 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV4. */
506 static const struct rte_flow_item_ipv4 rte_flow_item_ipv4_mask = {
508 .src_addr = RTE_BE32(0xffffffff),
509 .dst_addr = RTE_BE32(0xffffffff),
515 * RTE_FLOW_ITEM_TYPE_IPV6.
517 * Matches an IPv6 header.
519 * Note: IPv6 options are handled by dedicated pattern items.
521 struct rte_flow_item_ipv6 {
522 struct ipv6_hdr hdr; /**< IPv6 header definition. */
525 /** Default mask for RTE_FLOW_ITEM_TYPE_IPV6. */
527 static const struct rte_flow_item_ipv6 rte_flow_item_ipv6_mask = {
530 "\xff\xff\xff\xff\xff\xff\xff\xff"
531 "\xff\xff\xff\xff\xff\xff\xff\xff",
533 "\xff\xff\xff\xff\xff\xff\xff\xff"
534 "\xff\xff\xff\xff\xff\xff\xff\xff",
540 * RTE_FLOW_ITEM_TYPE_ICMP.
542 * Matches an ICMP header.
544 struct rte_flow_item_icmp {
545 struct icmp_hdr hdr; /**< ICMP header definition. */
548 /** Default mask for RTE_FLOW_ITEM_TYPE_ICMP. */
550 static const struct rte_flow_item_icmp rte_flow_item_icmp_mask = {
559 * RTE_FLOW_ITEM_TYPE_UDP.
561 * Matches a UDP header.
563 struct rte_flow_item_udp {
564 struct udp_hdr hdr; /**< UDP header definition. */
567 /** Default mask for RTE_FLOW_ITEM_TYPE_UDP. */
569 static const struct rte_flow_item_udp rte_flow_item_udp_mask = {
571 .src_port = RTE_BE16(0xffff),
572 .dst_port = RTE_BE16(0xffff),
578 * RTE_FLOW_ITEM_TYPE_TCP.
580 * Matches a TCP header.
582 struct rte_flow_item_tcp {
583 struct tcp_hdr hdr; /**< TCP header definition. */
586 /** Default mask for RTE_FLOW_ITEM_TYPE_TCP. */
588 static const struct rte_flow_item_tcp rte_flow_item_tcp_mask = {
590 .src_port = RTE_BE16(0xffff),
591 .dst_port = RTE_BE16(0xffff),
597 * RTE_FLOW_ITEM_TYPE_SCTP.
599 * Matches a SCTP header.
601 struct rte_flow_item_sctp {
602 struct sctp_hdr hdr; /**< SCTP header definition. */
605 /** Default mask for RTE_FLOW_ITEM_TYPE_SCTP. */
607 static const struct rte_flow_item_sctp rte_flow_item_sctp_mask = {
609 .src_port = RTE_BE16(0xffff),
610 .dst_port = RTE_BE16(0xffff),
616 * RTE_FLOW_ITEM_TYPE_VXLAN.
618 * Matches a VXLAN header (RFC 7348).
620 struct rte_flow_item_vxlan {
621 uint8_t flags; /**< Normally 0x08 (I flag). */
622 uint8_t rsvd0[3]; /**< Reserved, normally 0x000000. */
623 uint8_t vni[3]; /**< VXLAN identifier. */
624 uint8_t rsvd1; /**< Reserved, normally 0x00. */
627 /** Default mask for RTE_FLOW_ITEM_TYPE_VXLAN. */
629 static const struct rte_flow_item_vxlan rte_flow_item_vxlan_mask = {
630 .vni = "\xff\xff\xff",
635 * RTE_FLOW_ITEM_TYPE_E_TAG.
637 * Matches a E-tag header.
639 struct rte_flow_item_e_tag {
640 rte_be16_t tpid; /**< Tag protocol identifier (0x893F). */
642 * E-Tag control information (E-TCI).
643 * E-PCP (3b), E-DEI (1b), ingress E-CID base (12b).
645 rte_be16_t epcp_edei_in_ecid_b;
646 /** Reserved (2b), GRP (2b), E-CID base (12b). */
647 rte_be16_t rsvd_grp_ecid_b;
648 uint8_t in_ecid_e; /**< Ingress E-CID ext. */
649 uint8_t ecid_e; /**< E-CID ext. */
652 /** Default mask for RTE_FLOW_ITEM_TYPE_E_TAG. */
654 static const struct rte_flow_item_e_tag rte_flow_item_e_tag_mask = {
655 .rsvd_grp_ecid_b = RTE_BE16(0x3fff),
660 * RTE_FLOW_ITEM_TYPE_NVGRE.
662 * Matches a NVGRE header.
664 struct rte_flow_item_nvgre {
666 * Checksum (1b), undefined (1b), key bit (1b), sequence number (1b),
667 * reserved 0 (9b), version (3b).
669 * c_k_s_rsvd0_ver must have value 0x2000 according to RFC 7637.
671 rte_be16_t c_k_s_rsvd0_ver;
672 rte_be16_t protocol; /**< Protocol type (0x6558). */
673 uint8_t tni[3]; /**< Virtual subnet ID. */
674 uint8_t flow_id; /**< Flow ID. */
677 /** Default mask for RTE_FLOW_ITEM_TYPE_NVGRE. */
679 static const struct rte_flow_item_nvgre rte_flow_item_nvgre_mask = {
680 .tni = "\xff\xff\xff",
685 * RTE_FLOW_ITEM_TYPE_MPLS.
687 * Matches a MPLS header.
689 struct rte_flow_item_mpls {
691 * Label (20b), TC (3b), Bottom of Stack (1b).
693 uint8_t label_tc_s[3];
694 uint8_t ttl; /** Time-to-Live. */
697 /** Default mask for RTE_FLOW_ITEM_TYPE_MPLS. */
699 static const struct rte_flow_item_mpls rte_flow_item_mpls_mask = {
700 .label_tc_s = "\xff\xff\xf0",
705 * RTE_FLOW_ITEM_TYPE_GRE.
707 * Matches a GRE header.
709 struct rte_flow_item_gre {
711 * Checksum (1b), reserved 0 (12b), version (3b).
714 rte_be16_t c_rsvd0_ver;
715 rte_be16_t protocol; /**< Protocol type. */
718 /** Default mask for RTE_FLOW_ITEM_TYPE_GRE. */
720 static const struct rte_flow_item_gre rte_flow_item_gre_mask = {
721 .protocol = RTE_BE16(0xffff),
726 * RTE_FLOW_ITEM_TYPE_FUZZY
728 * Fuzzy pattern match, expect faster than default.
730 * This is for device that support fuzzy match option.
731 * Usually a fuzzy match is fast but the cost is accuracy.
732 * i.e. Signature Match only match pattern's hash value, but it is
733 * possible two different patterns have the same hash value.
735 * Matching accuracy level can be configure by threshold.
736 * Driver can divide the range of threshold and map to different
737 * accuracy levels that device support.
739 * Threshold 0 means perfect match (no fuzziness), while threshold
740 * 0xffffffff means fuzziest match.
742 struct rte_flow_item_fuzzy {
743 uint32_t thresh; /**< Accuracy threshold. */
746 /** Default mask for RTE_FLOW_ITEM_TYPE_FUZZY. */
748 static const struct rte_flow_item_fuzzy rte_flow_item_fuzzy_mask = {
749 .thresh = 0xffffffff,
754 * RTE_FLOW_ITEM_TYPE_GTP.
756 * Matches a GTPv1 header.
758 struct rte_flow_item_gtp {
760 * Version (3b), protocol type (1b), reserved (1b),
761 * Extension header flag (1b),
762 * Sequence number flag (1b),
763 * N-PDU number flag (1b).
765 uint8_t v_pt_rsv_flags;
766 uint8_t msg_type; /**< Message type. */
767 rte_be16_t msg_len; /**< Message length. */
768 rte_be32_t teid; /**< Tunnel endpoint identifier. */
771 /** Default mask for RTE_FLOW_ITEM_TYPE_GTP. */
773 static const struct rte_flow_item_gtp rte_flow_item_gtp_mask = {
774 .teid = RTE_BE32(0xffffffff),
779 * RTE_FLOW_ITEM_TYPE_ESP
781 * Matches an ESP header.
783 struct rte_flow_item_esp {
784 struct esp_hdr hdr; /**< ESP header definition. */
787 /** Default mask for RTE_FLOW_ITEM_TYPE_ESP. */
789 static const struct rte_flow_item_esp rte_flow_item_esp_mask = {
797 * RTE_FLOW_ITEM_TYPE_GENEVE.
799 * Matches a GENEVE header.
801 struct rte_flow_item_geneve {
803 * Version (2b), length of the options fields (6b), OAM packet (1b),
804 * critical options present (1b), reserved 0 (6b).
806 rte_be16_t ver_opt_len_o_c_rsvd0;
807 rte_be16_t protocol; /**< Protocol type. */
808 uint8_t vni[3]; /**< Virtual Network Identifier. */
809 uint8_t rsvd1; /**< Reserved, normally 0x00. */
812 /** Default mask for RTE_FLOW_ITEM_TYPE_GENEVE. */
814 static const struct rte_flow_item_geneve rte_flow_item_geneve_mask = {
815 .vni = "\xff\xff\xff",
820 * Matching pattern item definition.
822 * A pattern is formed by stacking items starting from the lowest protocol
823 * layer to match. This stacking restriction does not apply to meta items
824 * which can be placed anywhere in the stack without affecting the meaning
825 * of the resulting pattern.
827 * Patterns are terminated by END items.
829 * The spec field should be a valid pointer to a structure of the related
830 * item type. It may remain unspecified (NULL) in many cases to request
831 * broad (nonspecific) matching. In such cases, last and mask must also be
834 * Optionally, last can point to a structure of the same type to define an
835 * inclusive range. This is mostly supported by integer and address fields,
836 * may cause errors otherwise. Fields that do not support ranges must be set
837 * to 0 or to the same value as the corresponding fields in spec.
839 * Only the fields defined to nonzero values in the default masks (see
840 * rte_flow_item_{name}_mask constants) are considered relevant by
841 * default. This can be overridden by providing a mask structure of the
842 * same type with applicable bits set to one. It can also be used to
843 * partially filter out specific fields (e.g. as an alternate mean to match
844 * ranges of IP addresses).
846 * Mask is a simple bit-mask applied before interpreting the contents of
847 * spec and last, which may yield unexpected results if not used
848 * carefully. For example, if for an IPv4 address field, spec provides
849 * 10.1.2.3, last provides 10.3.4.5 and mask provides 255.255.0.0, the
850 * effective range becomes 10.1.0.0 to 10.3.255.255.
852 struct rte_flow_item {
853 enum rte_flow_item_type type; /**< Item type. */
854 const void *spec; /**< Pointer to item specification structure. */
855 const void *last; /**< Defines an inclusive range (spec to last). */
856 const void *mask; /**< Bit-mask applied to spec and last. */
862 * Each possible action is represented by a type. Some have associated
863 * configuration structures. Several actions combined in a list can be
864 * affected to a flow rule. That list is not ordered.
866 * They fall in three categories:
868 * - Terminating actions (such as QUEUE, DROP, RSS, PF, VF) that prevent
869 * processing matched packets by subsequent flow rules, unless overridden
872 * - Non terminating actions (PASSTHRU, DUP) that leave matched packets up
873 * for additional processing by subsequent flow rules.
875 * - Other non terminating meta actions that do not affect the fate of
876 * packets (END, VOID, MARK, FLAG, COUNT).
878 * When several actions are combined in a flow rule, they should all have
879 * different types (e.g. dropping a packet twice is not possible).
881 * Only the last action of a given type is taken into account. PMDs still
882 * perform error checking on the entire list.
884 * Note that PASSTHRU is the only action able to override a terminating
887 enum rte_flow_action_type {
891 * End marker for action lists. Prevents further processing of
892 * actions, thereby ending the list.
894 * No associated configuration structure.
896 RTE_FLOW_ACTION_TYPE_END,
901 * Used as a placeholder for convenience. It is ignored and simply
904 * No associated configuration structure.
906 RTE_FLOW_ACTION_TYPE_VOID,
909 * Leaves packets up for additional processing by subsequent flow
910 * rules. This is the default when a rule does not contain a
911 * terminating action, but can be specified to force a rule to
912 * become non-terminating.
914 * No associated configuration structure.
916 RTE_FLOW_ACTION_TYPE_PASSTHRU,
921 * Attaches an integer value to packets and sets PKT_RX_FDIR and
922 * PKT_RX_FDIR_ID mbuf flags.
924 * See struct rte_flow_action_mark.
926 RTE_FLOW_ACTION_TYPE_MARK,
931 * Flags packets. Similar to MARK without a specific value; only
932 * sets the PKT_RX_FDIR mbuf flag.
934 * No associated configuration structure.
936 RTE_FLOW_ACTION_TYPE_FLAG,
939 * Assigns packets to a given queue index.
941 * See struct rte_flow_action_queue.
943 RTE_FLOW_ACTION_TYPE_QUEUE,
948 * PASSTHRU overrides this action if both are specified.
950 * No associated configuration structure.
952 RTE_FLOW_ACTION_TYPE_DROP,
957 * Enables counters for this rule.
959 * These counters can be retrieved and reset through rte_flow_query(),
960 * see struct rte_flow_query_count.
962 * No associated configuration structure.
964 RTE_FLOW_ACTION_TYPE_COUNT,
967 * Duplicates packets to a given queue index.
969 * This is normally combined with QUEUE, however when used alone, it
970 * is actually similar to QUEUE + PASSTHRU.
972 * See struct rte_flow_action_dup.
974 RTE_FLOW_ACTION_TYPE_DUP,
977 * Similar to QUEUE, except RSS is additionally performed on packets
978 * to spread them among several queues according to the provided
981 * See struct rte_flow_action_rss.
983 RTE_FLOW_ACTION_TYPE_RSS,
986 * Redirects packets to the physical function (PF) of the current
989 * No associated configuration structure.
991 RTE_FLOW_ACTION_TYPE_PF,
994 * Redirects packets to the virtual function (VF) of the current
995 * device with the specified ID.
997 * See struct rte_flow_action_vf.
999 RTE_FLOW_ACTION_TYPE_VF,
1002 * Traffic metering and policing (MTR).
1004 * See struct rte_flow_action_meter.
1005 * See file rte_mtr.h for MTR object configuration.
1007 RTE_FLOW_ACTION_TYPE_METER,
1010 * Redirects packets to security engine of current device for security
1011 * processing as specified by security session.
1013 * See struct rte_flow_action_security.
1015 RTE_FLOW_ACTION_TYPE_SECURITY
1019 * RTE_FLOW_ACTION_TYPE_MARK
1021 * Attaches an integer value to packets and sets PKT_RX_FDIR and
1022 * PKT_RX_FDIR_ID mbuf flags.
1024 * This value is arbitrary and application-defined. Maximum allowed value
1025 * depends on the underlying implementation. It is returned in the
1026 * hash.fdir.hi mbuf field.
1028 struct rte_flow_action_mark {
1029 uint32_t id; /**< Integer value to return with packets. */
1033 * RTE_FLOW_ACTION_TYPE_QUEUE
1035 * Assign packets to a given queue index.
1037 * Terminating by default.
1039 struct rte_flow_action_queue {
1040 uint16_t index; /**< Queue index to use. */
1044 * RTE_FLOW_ACTION_TYPE_COUNT (query)
1046 * Query structure to retrieve and reset flow rule counters.
1048 struct rte_flow_query_count {
1049 uint32_t reset:1; /**< Reset counters after query [in]. */
1050 uint32_t hits_set:1; /**< hits field is set [out]. */
1051 uint32_t bytes_set:1; /**< bytes field is set [out]. */
1052 uint32_t reserved:29; /**< Reserved, must be zero [in, out]. */
1053 uint64_t hits; /**< Number of hits for this rule [out]. */
1054 uint64_t bytes; /**< Number of bytes through this rule [out]. */
1058 * RTE_FLOW_ACTION_TYPE_DUP
1060 * Duplicates packets to a given queue index.
1062 * This is normally combined with QUEUE, however when used alone, it is
1063 * actually similar to QUEUE + PASSTHRU.
1065 * Non-terminating by default.
1067 struct rte_flow_action_dup {
1068 uint16_t index; /**< Queue index to duplicate packets to. */
1072 * RTE_FLOW_ACTION_TYPE_RSS
1074 * Similar to QUEUE, except RSS is additionally performed on packets to
1075 * spread them among several queues according to the provided parameters.
1077 * Note: RSS hash result is stored in the hash.rss mbuf field which overlaps
1078 * hash.fdir.lo. Since the MARK action sets the hash.fdir.hi field only,
1079 * both can be requested simultaneously.
1081 * Terminating by default.
1083 struct rte_flow_action_rss {
1084 const struct rte_eth_rss_conf *rss_conf; /**< RSS parameters. */
1085 uint16_t num; /**< Number of entries in queue[]. */
1086 uint16_t queue[]; /**< Queues indices to use. */
1090 * RTE_FLOW_ACTION_TYPE_VF
1092 * Redirects packets to a virtual function (VF) of the current device.
1094 * Packets matched by a VF pattern item can be redirected to their original
1095 * VF ID instead of the specified one. This parameter may not be available
1096 * and is not guaranteed to work properly if the VF part is matched by a
1097 * prior flow rule or if packets are not addressed to a VF in the first
1100 * Terminating by default.
1102 struct rte_flow_action_vf {
1103 uint32_t original:1; /**< Use original VF ID if possible. */
1104 uint32_t reserved:31; /**< Reserved, must be zero. */
1105 uint32_t id; /**< VF ID to redirect packets to. */
1109 * RTE_FLOW_ACTION_TYPE_METER
1111 * Traffic metering and policing (MTR).
1113 * Packets matched by items of this type can be either dropped or passed to the
1114 * next item with their color set by the MTR object.
1116 * Non-terminating by default.
1118 struct rte_flow_action_meter {
1119 uint32_t mtr_id; /**< MTR object ID created with rte_mtr_create(). */
1123 * RTE_FLOW_ACTION_TYPE_SECURITY
1125 * Perform the security action on flows matched by the pattern items
1126 * according to the configuration of the security session.
1128 * This action modifies the payload of matched flows. For INLINE_CRYPTO, the
1129 * security protocol headers and IV are fully provided by the application as
1130 * specified in the flow pattern. The payload of matching packets is
1131 * encrypted on egress, and decrypted and authenticated on ingress.
1132 * For INLINE_PROTOCOL, the security protocol is fully offloaded to HW,
1133 * providing full encapsulation and decapsulation of packets in security
1134 * protocols. The flow pattern specifies both the outer security header fields
1135 * and the inner packet fields. The security session specified in the action
1136 * must match the pattern parameters.
1138 * The security session specified in the action must be created on the same
1139 * port as the flow action that is being specified.
1141 * The ingress/egress flow attribute should match that specified in the
1142 * security session if the security session supports the definition of the
1145 * Multiple flows can be configured to use the same security session.
1147 * Non-terminating by default.
1149 struct rte_flow_action_security {
1150 void *security_session; /**< Pointer to security session structure. */
1154 * Definition of a single action.
1156 * A list of actions is terminated by a END action.
1158 * For simple actions without a configuration structure, conf remains NULL.
1160 struct rte_flow_action {
1161 enum rte_flow_action_type type; /**< Action type. */
1162 const void *conf; /**< Pointer to action configuration structure. */
1166 * Opaque type returned after successfully creating a flow.
1168 * This handle can be used to manage and query the related flow (e.g. to
1169 * destroy it or retrieve counters).
1174 * Verbose error types.
1176 * Most of them provide the type of the object referenced by struct
1177 * rte_flow_error.cause.
1179 enum rte_flow_error_type {
1180 RTE_FLOW_ERROR_TYPE_NONE, /**< No error. */
1181 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, /**< Cause unspecified. */
1182 RTE_FLOW_ERROR_TYPE_HANDLE, /**< Flow rule (handle). */
1183 RTE_FLOW_ERROR_TYPE_ATTR_GROUP, /**< Group field. */
1184 RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, /**< Priority field. */
1185 RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, /**< Ingress field. */
1186 RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, /**< Egress field. */
1187 RTE_FLOW_ERROR_TYPE_ATTR, /**< Attributes structure. */
1188 RTE_FLOW_ERROR_TYPE_ITEM_NUM, /**< Pattern length. */
1189 RTE_FLOW_ERROR_TYPE_ITEM, /**< Specific pattern item. */
1190 RTE_FLOW_ERROR_TYPE_ACTION_NUM, /**< Number of actions. */
1191 RTE_FLOW_ERROR_TYPE_ACTION, /**< Specific action. */
1195 * Verbose error structure definition.
1197 * This object is normally allocated by applications and set by PMDs, the
1198 * message points to a constant string which does not need to be freed by
1199 * the application, however its pointer can be considered valid only as long
1200 * as its associated DPDK port remains configured. Closing the underlying
1201 * device or unloading the PMD invalidates it.
1203 * Both cause and message may be NULL regardless of the error type.
1205 struct rte_flow_error {
1206 enum rte_flow_error_type type; /**< Cause field and error types. */
1207 const void *cause; /**< Object responsible for the error. */
1208 const char *message; /**< Human-readable error message. */
1212 * Check whether a flow rule can be created on a given port.
1214 * The flow rule is validated for correctness and whether it could be accepted
1215 * by the device given sufficient resources. The rule is checked against the
1216 * current device mode and queue configuration. The flow rule may also
1217 * optionally be validated against existing flow rules and device resources.
1218 * This function has no effect on the target device.
1220 * The returned value is guaranteed to remain valid only as long as no
1221 * successful calls to rte_flow_create() or rte_flow_destroy() are made in
1222 * the meantime and no device parameter affecting flow rules in any way are
1223 * modified, due to possible collisions or resource limitations (although in
1224 * such cases EINVAL should not be returned).
1227 * Port identifier of Ethernet device.
1229 * Flow rule attributes.
1230 * @param[in] pattern
1231 * Pattern specification (list terminated by the END pattern item).
1232 * @param[in] actions
1233 * Associated actions (list terminated by the END action).
1235 * Perform verbose error reporting if not NULL. PMDs initialize this
1236 * structure in case of error only.
1239 * 0 if flow rule is valid and can be created. A negative errno value
1240 * otherwise (rte_errno is also set), the following errors are defined:
1242 * -ENOSYS: underlying device does not support this functionality.
1244 * -EIO: underlying device is removed.
1246 * -EINVAL: unknown or invalid rule specification.
1248 * -ENOTSUP: valid but unsupported rule specification (e.g. partial
1249 * bit-masks are unsupported).
1251 * -EEXIST: collision with an existing rule. Only returned if device
1252 * supports flow rule collision checking and there was a flow rule
1253 * collision. Not receiving this return code is no guarantee that creating
1254 * the rule will not fail due to a collision.
1256 * -ENOMEM: not enough memory to execute the function, or if the device
1257 * supports resource validation, resource limitation on the device.
1259 * -EBUSY: action cannot be performed due to busy device resources, may
1260 * succeed if the affected queues or even the entire port are in a stopped
1261 * state (see rte_eth_dev_rx_queue_stop() and rte_eth_dev_stop()).
1264 rte_flow_validate(uint16_t port_id,
1265 const struct rte_flow_attr *attr,
1266 const struct rte_flow_item pattern[],
1267 const struct rte_flow_action actions[],
1268 struct rte_flow_error *error);
1271 * Create a flow rule on a given port.
1274 * Port identifier of Ethernet device.
1276 * Flow rule attributes.
1277 * @param[in] pattern
1278 * Pattern specification (list terminated by the END pattern item).
1279 * @param[in] actions
1280 * Associated actions (list terminated by the END action).
1282 * Perform verbose error reporting if not NULL. PMDs initialize this
1283 * structure in case of error only.
1286 * A valid handle in case of success, NULL otherwise and rte_errno is set
1287 * to the positive version of one of the error codes defined for
1288 * rte_flow_validate().
1291 rte_flow_create(uint16_t port_id,
1292 const struct rte_flow_attr *attr,
1293 const struct rte_flow_item pattern[],
1294 const struct rte_flow_action actions[],
1295 struct rte_flow_error *error);
1298 * Destroy a flow rule on a given port.
1300 * Failure to destroy a flow rule handle may occur when other flow rules
1301 * depend on it, and destroying it would result in an inconsistent state.
1303 * This function is only guaranteed to succeed if handles are destroyed in
1304 * reverse order of their creation.
1307 * Port identifier of Ethernet device.
1309 * Flow rule handle to destroy.
1311 * Perform verbose error reporting if not NULL. PMDs initialize this
1312 * structure in case of error only.
1315 * 0 on success, a negative errno value otherwise and rte_errno is set.
1318 rte_flow_destroy(uint16_t port_id,
1319 struct rte_flow *flow,
1320 struct rte_flow_error *error);
1323 * Destroy all flow rules associated with a port.
1325 * In the unlikely event of failure, handles are still considered destroyed
1326 * and no longer valid but the port must be assumed to be in an inconsistent
1330 * Port identifier of Ethernet device.
1332 * Perform verbose error reporting if not NULL. PMDs initialize this
1333 * structure in case of error only.
1336 * 0 on success, a negative errno value otherwise and rte_errno is set.
1339 rte_flow_flush(uint16_t port_id,
1340 struct rte_flow_error *error);
1343 * Query an existing flow rule.
1345 * This function allows retrieving flow-specific data such as counters.
1346 * Data is gathered by special actions which must be present in the flow
1349 * \see RTE_FLOW_ACTION_TYPE_COUNT
1352 * Port identifier of Ethernet device.
1354 * Flow rule handle to query.
1356 * Action type to query.
1357 * @param[in, out] data
1358 * Pointer to storage for the associated query data type.
1360 * Perform verbose error reporting if not NULL. PMDs initialize this
1361 * structure in case of error only.
1364 * 0 on success, a negative errno value otherwise and rte_errno is set.
1367 rte_flow_query(uint16_t port_id,
1368 struct rte_flow *flow,
1369 enum rte_flow_action_type action,
1371 struct rte_flow_error *error);
1374 * Restrict ingress traffic to the defined flow rules.
1376 * Isolated mode guarantees that all ingress traffic comes from defined flow
1377 * rules only (current and future).
1379 * Besides making ingress more deterministic, it allows PMDs to safely reuse
1380 * resources otherwise assigned to handle the remaining traffic, such as
1381 * global RSS configuration settings, VLAN filters, MAC address entries,
1382 * legacy filter API rules and so on in order to expand the set of possible
1385 * Calling this function as soon as possible after device initialization,
1386 * ideally before the first call to rte_eth_dev_configure(), is recommended
1387 * to avoid possible failures due to conflicting settings.
1389 * Once effective, leaving isolated mode may not be possible depending on
1390 * PMD implementation.
1392 * Additionally, the following functionality has no effect on the underlying
1393 * port and may return errors such as ENOTSUP ("not supported"):
1395 * - Toggling promiscuous mode.
1396 * - Toggling allmulticast mode.
1397 * - Configuring MAC addresses.
1398 * - Configuring multicast addresses.
1399 * - Configuring VLAN filters.
1400 * - Configuring Rx filters through the legacy API (e.g. FDIR).
1401 * - Configuring global RSS settings.
1404 * Port identifier of Ethernet device.
1406 * Nonzero to enter isolated mode, attempt to leave it otherwise.
1408 * Perform verbose error reporting if not NULL. PMDs initialize this
1409 * structure in case of error only.
1412 * 0 on success, a negative errno value otherwise and rte_errno is set.
1415 rte_flow_isolate(uint16_t port_id, int set, struct rte_flow_error *error);
1418 * Initialize flow error structure.
1421 * Pointer to flow error structure (may be NULL).
1423 * Related error code (rte_errno).
1425 * Cause field and error types.
1427 * Object responsible for the error.
1429 * Human-readable error message.
1432 * Negative error code (errno value) and rte_errno is set.
1435 rte_flow_error_set(struct rte_flow_error *error,
1437 enum rte_flow_error_type type,
1439 const char *message);
1442 * Generic flow representation.
1444 * This form is sufficient to describe an rte_flow independently from any
1445 * PMD implementation and allows for replayability and identification.
1447 struct rte_flow_desc {
1448 size_t size; /**< Allocated space including data[]. */
1449 struct rte_flow_attr attr; /**< Attributes. */
1450 struct rte_flow_item *items; /**< Items. */
1451 struct rte_flow_action *actions; /**< Actions. */
1452 uint8_t data[]; /**< Storage for items/actions. */
1456 * Copy an rte_flow rule description.
1459 * Flow rule description.
1461 * Total size of allocated data for the flow description.
1463 * Flow rule attributes.
1465 * Pattern specification (list terminated by the END pattern item).
1466 * @param[in] actions
1467 * Associated actions (list terminated by the END action).
1470 * If len is greater or equal to the size of the flow, the total size of the
1471 * flow description and its data.
1472 * If len is lower than the size of the flow, the number of bytes that would
1473 * have been written to desc had it been sufficient. Nothing is written.
1476 rte_flow_copy(struct rte_flow_desc *fd, size_t len,
1477 const struct rte_flow_attr *attr,
1478 const struct rte_flow_item *items,
1479 const struct rte_flow_action *actions);
1485 #endif /* RTE_FLOW_H_ */