1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2016 6WIND S.A.
3 * Copyright 2016 Mellanox Technologies, Ltd
11 #include <rte_common.h>
12 #include <rte_errno.h>
13 #include <rte_branch_prediction.h>
14 #include <rte_string_fns.h>
15 #include "rte_ethdev.h"
16 #include "rte_flow_driver.h"
20 * Flow elements description tables.
22 struct rte_flow_desc_data {
27 /** Generate flow_item[] entry. */
28 #define MK_FLOW_ITEM(t, s) \
29 [RTE_FLOW_ITEM_TYPE_ ## t] = { \
34 /** Information about known flow pattern items. */
35 static const struct rte_flow_desc_data rte_flow_desc_item[] = {
37 MK_FLOW_ITEM(VOID, 0),
38 MK_FLOW_ITEM(INVERT, 0),
39 MK_FLOW_ITEM(ANY, sizeof(struct rte_flow_item_any)),
41 MK_FLOW_ITEM(VF, sizeof(struct rte_flow_item_vf)),
42 MK_FLOW_ITEM(PHY_PORT, sizeof(struct rte_flow_item_phy_port)),
43 MK_FLOW_ITEM(PORT_ID, sizeof(struct rte_flow_item_port_id)),
44 MK_FLOW_ITEM(RAW, sizeof(struct rte_flow_item_raw)),
45 MK_FLOW_ITEM(ETH, sizeof(struct rte_flow_item_eth)),
46 MK_FLOW_ITEM(VLAN, sizeof(struct rte_flow_item_vlan)),
47 MK_FLOW_ITEM(IPV4, sizeof(struct rte_flow_item_ipv4)),
48 MK_FLOW_ITEM(IPV6, sizeof(struct rte_flow_item_ipv6)),
49 MK_FLOW_ITEM(ICMP, sizeof(struct rte_flow_item_icmp)),
50 MK_FLOW_ITEM(UDP, sizeof(struct rte_flow_item_udp)),
51 MK_FLOW_ITEM(TCP, sizeof(struct rte_flow_item_tcp)),
52 MK_FLOW_ITEM(SCTP, sizeof(struct rte_flow_item_sctp)),
53 MK_FLOW_ITEM(VXLAN, sizeof(struct rte_flow_item_vxlan)),
54 MK_FLOW_ITEM(MPLS, sizeof(struct rte_flow_item_mpls)),
55 MK_FLOW_ITEM(GRE, sizeof(struct rte_flow_item_gre)),
56 MK_FLOW_ITEM(E_TAG, sizeof(struct rte_flow_item_e_tag)),
57 MK_FLOW_ITEM(NVGRE, sizeof(struct rte_flow_item_nvgre)),
58 MK_FLOW_ITEM(GENEVE, sizeof(struct rte_flow_item_geneve)),
59 MK_FLOW_ITEM(VXLAN_GPE, sizeof(struct rte_flow_item_vxlan_gpe)),
60 MK_FLOW_ITEM(ARP_ETH_IPV4, sizeof(struct rte_flow_item_arp_eth_ipv4)),
61 MK_FLOW_ITEM(IPV6_EXT, sizeof(struct rte_flow_item_ipv6_ext)),
62 MK_FLOW_ITEM(ICMP6, sizeof(struct rte_flow_item_icmp6)),
63 MK_FLOW_ITEM(ICMP6_ND_NS, sizeof(struct rte_flow_item_icmp6_nd_ns)),
64 MK_FLOW_ITEM(ICMP6_ND_NA, sizeof(struct rte_flow_item_icmp6_nd_na)),
65 MK_FLOW_ITEM(ICMP6_ND_OPT, sizeof(struct rte_flow_item_icmp6_nd_opt)),
66 MK_FLOW_ITEM(ICMP6_ND_OPT_SLA_ETH,
67 sizeof(struct rte_flow_item_icmp6_nd_opt_sla_eth)),
68 MK_FLOW_ITEM(ICMP6_ND_OPT_TLA_ETH,
69 sizeof(struct rte_flow_item_icmp6_nd_opt_tla_eth)),
72 /** Generate flow_action[] entry. */
73 #define MK_FLOW_ACTION(t, s) \
74 [RTE_FLOW_ACTION_TYPE_ ## t] = { \
79 /** Information about known flow actions. */
80 static const struct rte_flow_desc_data rte_flow_desc_action[] = {
81 MK_FLOW_ACTION(END, 0),
82 MK_FLOW_ACTION(VOID, 0),
83 MK_FLOW_ACTION(PASSTHRU, 0),
84 MK_FLOW_ACTION(MARK, sizeof(struct rte_flow_action_mark)),
85 MK_FLOW_ACTION(FLAG, 0),
86 MK_FLOW_ACTION(QUEUE, sizeof(struct rte_flow_action_queue)),
87 MK_FLOW_ACTION(DROP, 0),
88 MK_FLOW_ACTION(COUNT, sizeof(struct rte_flow_action_count)),
89 MK_FLOW_ACTION(RSS, sizeof(struct rte_flow_action_rss)),
90 MK_FLOW_ACTION(PF, 0),
91 MK_FLOW_ACTION(VF, sizeof(struct rte_flow_action_vf)),
92 MK_FLOW_ACTION(PHY_PORT, sizeof(struct rte_flow_action_phy_port)),
93 MK_FLOW_ACTION(PORT_ID, sizeof(struct rte_flow_action_port_id)),
94 MK_FLOW_ACTION(OF_SET_MPLS_TTL,
95 sizeof(struct rte_flow_action_of_set_mpls_ttl)),
96 MK_FLOW_ACTION(OF_DEC_MPLS_TTL, 0),
97 MK_FLOW_ACTION(OF_SET_NW_TTL,
98 sizeof(struct rte_flow_action_of_set_nw_ttl)),
99 MK_FLOW_ACTION(OF_DEC_NW_TTL, 0),
100 MK_FLOW_ACTION(OF_COPY_TTL_OUT, 0),
101 MK_FLOW_ACTION(OF_COPY_TTL_IN, 0),
102 MK_FLOW_ACTION(OF_POP_VLAN, 0),
103 MK_FLOW_ACTION(OF_PUSH_VLAN,
104 sizeof(struct rte_flow_action_of_push_vlan)),
105 MK_FLOW_ACTION(OF_SET_VLAN_VID,
106 sizeof(struct rte_flow_action_of_set_vlan_vid)),
107 MK_FLOW_ACTION(OF_SET_VLAN_PCP,
108 sizeof(struct rte_flow_action_of_set_vlan_pcp)),
109 MK_FLOW_ACTION(OF_POP_MPLS,
110 sizeof(struct rte_flow_action_of_pop_mpls)),
111 MK_FLOW_ACTION(OF_PUSH_MPLS,
112 sizeof(struct rte_flow_action_of_push_mpls)),
116 flow_err(uint16_t port_id, int ret, struct rte_flow_error *error)
120 if (rte_eth_dev_is_removed(port_id))
121 return rte_flow_error_set(error, EIO,
122 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
123 NULL, rte_strerror(EIO));
127 /* Get generic flow operations structure from a port. */
128 const struct rte_flow_ops *
129 rte_flow_ops_get(uint16_t port_id, struct rte_flow_error *error)
131 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
132 const struct rte_flow_ops *ops;
135 if (unlikely(!rte_eth_dev_is_valid_port(port_id)))
137 else if (unlikely(!dev->dev_ops->filter_ctrl ||
138 dev->dev_ops->filter_ctrl(dev,
139 RTE_ETH_FILTER_GENERIC,
146 rte_flow_error_set(error, code, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
147 NULL, rte_strerror(code));
151 /* Check whether a flow rule can be created on a given port. */
153 rte_flow_validate(uint16_t port_id,
154 const struct rte_flow_attr *attr,
155 const struct rte_flow_item pattern[],
156 const struct rte_flow_action actions[],
157 struct rte_flow_error *error)
159 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
160 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
164 if (likely(!!ops->validate))
165 return flow_err(port_id, ops->validate(dev, attr, pattern,
166 actions, error), error);
167 return rte_flow_error_set(error, ENOSYS,
168 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
169 NULL, rte_strerror(ENOSYS));
172 /* Create a flow rule on a given port. */
174 rte_flow_create(uint16_t port_id,
175 const struct rte_flow_attr *attr,
176 const struct rte_flow_item pattern[],
177 const struct rte_flow_action actions[],
178 struct rte_flow_error *error)
180 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
181 struct rte_flow *flow;
182 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
186 if (likely(!!ops->create)) {
187 flow = ops->create(dev, attr, pattern, actions, error);
189 flow_err(port_id, -rte_errno, error);
192 rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
193 NULL, rte_strerror(ENOSYS));
197 /* Destroy a flow rule on a given port. */
199 rte_flow_destroy(uint16_t port_id,
200 struct rte_flow *flow,
201 struct rte_flow_error *error)
203 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
204 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
208 if (likely(!!ops->destroy))
209 return flow_err(port_id, ops->destroy(dev, flow, error),
211 return rte_flow_error_set(error, ENOSYS,
212 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
213 NULL, rte_strerror(ENOSYS));
216 /* Destroy all flow rules associated with a port. */
218 rte_flow_flush(uint16_t port_id,
219 struct rte_flow_error *error)
221 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
222 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
226 if (likely(!!ops->flush))
227 return flow_err(port_id, ops->flush(dev, error), error);
228 return rte_flow_error_set(error, ENOSYS,
229 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
230 NULL, rte_strerror(ENOSYS));
233 /* Query an existing flow rule. */
235 rte_flow_query(uint16_t port_id,
236 struct rte_flow *flow,
237 const struct rte_flow_action *action,
239 struct rte_flow_error *error)
241 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
242 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
246 if (likely(!!ops->query))
247 return flow_err(port_id, ops->query(dev, flow, action, data,
249 return rte_flow_error_set(error, ENOSYS,
250 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
251 NULL, rte_strerror(ENOSYS));
254 /* Restrict ingress traffic to the defined flow rules. */
256 rte_flow_isolate(uint16_t port_id,
258 struct rte_flow_error *error)
260 struct rte_eth_dev *dev = &rte_eth_devices[port_id];
261 const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
265 if (likely(!!ops->isolate))
266 return flow_err(port_id, ops->isolate(dev, set, error), error);
267 return rte_flow_error_set(error, ENOSYS,
268 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
269 NULL, rte_strerror(ENOSYS));
272 /* Initialize flow error structure. */
274 rte_flow_error_set(struct rte_flow_error *error,
276 enum rte_flow_error_type type,
281 *error = (struct rte_flow_error){
291 /** Pattern item specification types. */
292 enum rte_flow_conv_item_spec_type {
293 RTE_FLOW_CONV_ITEM_SPEC,
294 RTE_FLOW_CONV_ITEM_LAST,
295 RTE_FLOW_CONV_ITEM_MASK,
299 * Copy pattern item specification.
302 * Output buffer. Can be NULL if @p size is zero.
304 * Size of @p buf in bytes.
306 * Pattern item to copy specification from.
308 * Specification selector for either @p spec, @p last or @p mask.
311 * Number of bytes needed to store pattern item specification regardless
312 * of @p size. @p buf contents are truncated to @p size if not large
316 rte_flow_conv_item_spec(void *buf, const size_t size,
317 const struct rte_flow_item *item,
318 enum rte_flow_conv_item_spec_type type)
322 type == RTE_FLOW_CONV_ITEM_SPEC ? item->spec :
323 type == RTE_FLOW_CONV_ITEM_LAST ? item->last :
324 type == RTE_FLOW_CONV_ITEM_MASK ? item->mask :
327 switch (item->type) {
329 const struct rte_flow_item_raw *raw;
332 const struct rte_flow_item_raw *raw;
335 const struct rte_flow_item_raw *raw;
338 const struct rte_flow_item_raw *raw;
341 struct rte_flow_item_raw *raw;
345 case RTE_FLOW_ITEM_TYPE_RAW:
346 spec.raw = item->spec;
347 last.raw = item->last ? item->last : item->spec;
348 mask.raw = item->mask ? item->mask : &rte_flow_item_raw_mask;
352 (&(struct rte_flow_item_raw){
353 .relative = src.raw->relative,
354 .search = src.raw->search,
355 .reserved = src.raw->reserved,
356 .offset = src.raw->offset,
357 .limit = src.raw->limit,
358 .length = src.raw->length,
360 size > sizeof(*dst.raw) ? sizeof(*dst.raw) : size);
361 off = sizeof(*dst.raw);
362 if (type == RTE_FLOW_CONV_ITEM_SPEC ||
363 (type == RTE_FLOW_CONV_ITEM_MASK &&
364 ((spec.raw->length & mask.raw->length) >=
365 (last.raw->length & mask.raw->length))))
366 tmp = spec.raw->length & mask.raw->length;
368 tmp = last.raw->length & mask.raw->length;
370 off = RTE_ALIGN_CEIL(off, sizeof(*dst.raw->pattern));
371 if (size >= off + tmp)
372 dst.raw->pattern = rte_memcpy
373 ((void *)((uintptr_t)dst.raw + off),
374 src.raw->pattern, tmp);
379 off = rte_flow_desc_item[item->type].size;
380 rte_memcpy(buf, data, (size > off ? off : size));
387 * Copy action configuration.
390 * Output buffer. Can be NULL if @p size is zero.
392 * Size of @p buf in bytes.
394 * Action to copy configuration from.
397 * Number of bytes needed to store pattern item specification regardless
398 * of @p size. @p buf contents are truncated to @p size if not large
402 rte_flow_conv_action_conf(void *buf, const size_t size,
403 const struct rte_flow_action *action)
407 switch (action->type) {
409 const struct rte_flow_action_rss *rss;
412 struct rte_flow_action_rss *rss;
416 case RTE_FLOW_ACTION_TYPE_RSS:
417 src.rss = action->conf;
420 (&(struct rte_flow_action_rss){
421 .func = src.rss->func,
422 .level = src.rss->level,
423 .types = src.rss->types,
424 .key_len = src.rss->key_len,
425 .queue_num = src.rss->queue_num,
427 size > sizeof(*dst.rss) ? sizeof(*dst.rss) : size);
428 off = sizeof(*dst.rss);
429 if (src.rss->key_len) {
430 off = RTE_ALIGN_CEIL(off, sizeof(*dst.rss->key));
431 tmp = sizeof(*src.rss->key) * src.rss->key_len;
432 if (size >= off + tmp)
433 dst.rss->key = rte_memcpy
434 ((void *)((uintptr_t)dst.rss + off),
438 if (src.rss->queue_num) {
439 off = RTE_ALIGN_CEIL(off, sizeof(*dst.rss->queue));
440 tmp = sizeof(*src.rss->queue) * src.rss->queue_num;
441 if (size >= off + tmp)
442 dst.rss->queue = rte_memcpy
443 ((void *)((uintptr_t)dst.rss + off),
444 src.rss->queue, tmp);
449 off = rte_flow_desc_action[action->type].size;
450 rte_memcpy(buf, action->conf, (size > off ? off : size));
457 * Copy a list of pattern items.
460 * Destination buffer. Can be NULL if @p size is zero.
462 * Size of @p dst in bytes.
464 * Source pattern items.
466 * Maximum number of pattern items to process from @p src or 0 to process
467 * the entire list. In both cases, processing stops after
468 * RTE_FLOW_ITEM_TYPE_END is encountered.
470 * Perform verbose error reporting if not NULL.
473 * A positive value representing the number of bytes needed to store
474 * pattern items regardless of @p size on success (@p buf contents are
475 * truncated to @p size if not large enough), a negative errno value
476 * otherwise and rte_errno is set.
479 rte_flow_conv_pattern(struct rte_flow_item *dst,
481 const struct rte_flow_item *src,
483 struct rte_flow_error *error)
485 uintptr_t data = (uintptr_t)dst;
490 for (i = 0, off = 0; !num || i != num; ++i, ++src, ++dst) {
491 if ((size_t)src->type >= RTE_DIM(rte_flow_desc_item) ||
492 !rte_flow_desc_item[src->type].name)
493 return rte_flow_error_set
494 (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, src,
495 "cannot convert unknown item type");
496 if (size >= off + sizeof(*dst))
497 *dst = (struct rte_flow_item){
509 off = RTE_ALIGN_CEIL(off, sizeof(double));
510 ret = rte_flow_conv_item_spec
511 ((void *)(data + off),
512 size > off ? size - off : 0, src,
513 RTE_FLOW_CONV_ITEM_SPEC);
514 if (size && size >= off + ret)
515 dst->spec = (void *)(data + off);
520 off = RTE_ALIGN_CEIL(off, sizeof(double));
521 ret = rte_flow_conv_item_spec
522 ((void *)(data + off),
523 size > off ? size - off : 0, src,
524 RTE_FLOW_CONV_ITEM_LAST);
525 if (size && size >= off + ret)
526 dst->last = (void *)(data + off);
530 off = RTE_ALIGN_CEIL(off, sizeof(double));
531 ret = rte_flow_conv_item_spec
532 ((void *)(data + off),
533 size > off ? size - off : 0, src,
534 RTE_FLOW_CONV_ITEM_MASK);
535 if (size && size >= off + ret)
536 dst->mask = (void *)(data + off);
546 * Copy a list of actions.
549 * Destination buffer. Can be NULL if @p size is zero.
551 * Size of @p dst in bytes.
555 * Maximum number of actions to process from @p src or 0 to process the
556 * entire list. In both cases, processing stops after
557 * RTE_FLOW_ACTION_TYPE_END is encountered.
559 * Perform verbose error reporting if not NULL.
562 * A positive value representing the number of bytes needed to store
563 * actions regardless of @p size on success (@p buf contents are truncated
564 * to @p size if not large enough), a negative errno value otherwise and
568 rte_flow_conv_actions(struct rte_flow_action *dst,
570 const struct rte_flow_action *src,
572 struct rte_flow_error *error)
574 uintptr_t data = (uintptr_t)dst;
579 for (i = 0, off = 0; !num || i != num; ++i, ++src, ++dst) {
580 if ((size_t)src->type >= RTE_DIM(rte_flow_desc_action) ||
581 !rte_flow_desc_action[src->type].name)
582 return rte_flow_error_set
583 (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
584 src, "cannot convert unknown action type");
585 if (size >= off + sizeof(*dst))
586 *dst = (struct rte_flow_action){
598 off = RTE_ALIGN_CEIL(off, sizeof(double));
599 ret = rte_flow_conv_action_conf
600 ((void *)(data + off),
601 size > off ? size - off : 0, src);
602 if (size && size >= off + ret)
603 dst->conf = (void *)(data + off);
613 * Copy flow rule components.
615 * This comprises the flow rule descriptor itself, attributes, pattern and
616 * actions list. NULL components in @p src are skipped.
619 * Destination buffer. Can be NULL if @p size is zero.
621 * Size of @p dst in bytes.
623 * Source flow rule descriptor.
625 * Perform verbose error reporting if not NULL.
628 * A positive value representing the number of bytes needed to store all
629 * components including the descriptor regardless of @p size on success
630 * (@p buf contents are truncated to @p size if not large enough), a
631 * negative errno value otherwise and rte_errno is set.
634 rte_flow_conv_rule(struct rte_flow_conv_rule *dst,
636 const struct rte_flow_conv_rule *src,
637 struct rte_flow_error *error)
643 (&(struct rte_flow_conv_rule){
648 size > sizeof(*dst) ? sizeof(*dst) : size);
651 off = RTE_ALIGN_CEIL(off, sizeof(double));
652 if (size && size >= off + sizeof(*dst->attr))
653 dst->attr = rte_memcpy
654 ((void *)((uintptr_t)dst + off),
655 src->attr_ro, sizeof(*dst->attr));
656 off += sizeof(*dst->attr);
658 if (src->pattern_ro) {
659 off = RTE_ALIGN_CEIL(off, sizeof(double));
660 ret = rte_flow_conv_pattern((void *)((uintptr_t)dst + off),
661 size > off ? size - off : 0,
662 src->pattern_ro, 0, error);
665 if (size && size >= off + (size_t)ret)
666 dst->pattern = (void *)((uintptr_t)dst + off);
669 if (src->actions_ro) {
670 off = RTE_ALIGN_CEIL(off, sizeof(double));
671 ret = rte_flow_conv_actions((void *)((uintptr_t)dst + off),
672 size > off ? size - off : 0,
673 src->actions_ro, 0, error);
676 if (size >= off + (size_t)ret)
677 dst->actions = (void *)((uintptr_t)dst + off);
684 * Retrieve the name of a pattern item/action type.
687 * Nonzero when @p src represents an action type instead of a pattern item
690 * Nonzero to write string address instead of contents into @p dst.
692 * Destination buffer. Can be NULL if @p size is zero.
694 * Size of @p dst in bytes.
696 * Depending on @p is_action, source pattern item or action type cast as a
699 * Perform verbose error reporting if not NULL.
702 * A positive value representing the number of bytes needed to store the
703 * name or its address regardless of @p size on success (@p buf contents
704 * are truncated to @p size if not large enough), a negative errno value
705 * otherwise and rte_errno is set.
708 rte_flow_conv_name(int is_action,
713 struct rte_flow_error *error)
716 const struct rte_flow_desc_data *data;
719 static const struct desc_info info_rep[2] = {
720 { rte_flow_desc_item, RTE_DIM(rte_flow_desc_item), },
721 { rte_flow_desc_action, RTE_DIM(rte_flow_desc_action), },
723 const struct desc_info *const info = &info_rep[!!is_action];
724 unsigned int type = (uintptr_t)src;
726 if (type >= info->num)
727 return rte_flow_error_set
728 (error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
729 "unknown object type to retrieve the name of");
731 return strlcpy(dst, info->data[type].name, size);
732 if (size >= sizeof(const char **))
733 *((const char **)dst) = info->data[type].name;
734 return sizeof(const char **);
737 /** Helper function to convert flow API objects. */
739 rte_flow_conv(enum rte_flow_conv_op op,
743 struct rte_flow_error *error)
746 const struct rte_flow_attr *attr;
748 case RTE_FLOW_CONV_OP_NONE:
750 case RTE_FLOW_CONV_OP_ATTR:
752 if (size > sizeof(*attr))
753 size = sizeof(*attr);
754 rte_memcpy(dst, attr, size);
755 return sizeof(*attr);
756 case RTE_FLOW_CONV_OP_ITEM:
757 return rte_flow_conv_pattern(dst, size, src, 1, error);
758 case RTE_FLOW_CONV_OP_ACTION:
759 return rte_flow_conv_actions(dst, size, src, 1, error);
760 case RTE_FLOW_CONV_OP_PATTERN:
761 return rte_flow_conv_pattern(dst, size, src, 0, error);
762 case RTE_FLOW_CONV_OP_ACTIONS:
763 return rte_flow_conv_actions(dst, size, src, 0, error);
764 case RTE_FLOW_CONV_OP_RULE:
765 return rte_flow_conv_rule(dst, size, src, error);
766 case RTE_FLOW_CONV_OP_ITEM_NAME:
767 return rte_flow_conv_name(0, 0, dst, size, src, error);
768 case RTE_FLOW_CONV_OP_ACTION_NAME:
769 return rte_flow_conv_name(1, 0, dst, size, src, error);
770 case RTE_FLOW_CONV_OP_ITEM_NAME_PTR:
771 return rte_flow_conv_name(0, 1, dst, size, src, error);
772 case RTE_FLOW_CONV_OP_ACTION_NAME_PTR:
773 return rte_flow_conv_name(1, 1, dst, size, src, error);
775 return rte_flow_error_set
776 (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
777 "unknown object conversion operation");
780 /** Store a full rte_flow description. */
782 rte_flow_copy(struct rte_flow_desc *desc, size_t len,
783 const struct rte_flow_attr *attr,
784 const struct rte_flow_item *items,
785 const struct rte_flow_action *actions)
788 * Overlap struct rte_flow_conv with struct rte_flow_desc in order
789 * to convert the former to the latter without wasting space.
791 struct rte_flow_conv_rule *dst =
793 (void *)((uintptr_t)desc +
794 (offsetof(struct rte_flow_desc, actions) -
795 offsetof(struct rte_flow_conv_rule, actions))) :
798 len > sizeof(*desc) - sizeof(*dst) ?
799 len - (sizeof(*desc) - sizeof(*dst)) :
801 struct rte_flow_conv_rule src = {
804 .actions_ro = actions,
808 RTE_BUILD_BUG_ON(sizeof(struct rte_flow_desc) <
809 sizeof(struct rte_flow_conv_rule));
811 (&dst->pattern != &desc->items ||
812 &dst->actions != &desc->actions ||
813 (uintptr_t)(dst + 1) != (uintptr_t)(desc + 1))) {
817 ret = rte_flow_conv(RTE_FLOW_CONV_OP_RULE, dst, dst_size, &src, NULL);
820 ret += sizeof(*desc) - sizeof(*dst);
822 (&(struct rte_flow_desc){
825 .items = dst_size ? dst->pattern : NULL,
826 .actions = dst_size ? dst->actions : NULL,
828 len > sizeof(*desc) ? sizeof(*desc) : len);
833 * Expand RSS flows into several possible flows according to the RSS hash
834 * fields requested and the driver capabilities.
836 int __rte_experimental
837 rte_flow_expand_rss(struct rte_flow_expand_rss *buf, size_t size,
838 const struct rte_flow_item *pattern, uint64_t types,
839 const struct rte_flow_expand_node graph[],
840 int graph_root_index)
843 const struct rte_flow_item *item;
844 const struct rte_flow_expand_node *node = &graph[graph_root_index];
845 const int *next_node;
846 const int *stack[elt_n];
848 struct rte_flow_item flow_items[elt_n];
851 size_t user_pattern_size = 0;
854 lsize = offsetof(struct rte_flow_expand_rss, entry) +
855 elt_n * sizeof(buf->entry[0]);
857 buf->entry[0].priority = 0;
858 buf->entry[0].pattern = (void *)&buf->entry[elt_n];
860 addr = buf->entry[0].pattern;
862 for (item = pattern; item->type != RTE_FLOW_ITEM_TYPE_END; item++) {
863 const struct rte_flow_expand_node *next = NULL;
865 for (i = 0; node->next && node->next[i]; ++i) {
866 next = &graph[node->next[i]];
867 if (next->type == item->type)
872 user_pattern_size += sizeof(*item);
874 user_pattern_size += sizeof(*item); /* Handle END item. */
875 lsize += user_pattern_size;
876 /* Copy the user pattern in the first entry of the buffer. */
878 rte_memcpy(addr, pattern, user_pattern_size);
879 addr = (void *)(((uintptr_t)addr) + user_pattern_size);
882 /* Start expanding. */
883 memset(flow_items, 0, sizeof(flow_items));
884 user_pattern_size -= sizeof(*item);
885 next_node = node->next;
886 stack[stack_pos] = next_node;
887 node = next_node ? &graph[*next_node] : NULL;
889 flow_items[stack_pos].type = node->type;
890 if (node->rss_types & types) {
892 * compute the number of items to copy from the
893 * expansion and copy it.
894 * When the stack_pos is 0, there are 1 element in it,
895 * plus the addition END item.
897 int elt = stack_pos + 2;
899 flow_items[stack_pos + 1].type = RTE_FLOW_ITEM_TYPE_END;
900 lsize += elt * sizeof(*item) + user_pattern_size;
902 size_t n = elt * sizeof(*item);
904 buf->entry[buf->entries].priority =
906 buf->entry[buf->entries].pattern = addr;
908 rte_memcpy(addr, buf->entry[0].pattern,
910 addr = (void *)(((uintptr_t)addr) +
912 rte_memcpy(addr, flow_items, n);
913 addr = (void *)(((uintptr_t)addr) + n);
918 next_node = node->next;
919 if (stack_pos++ == elt_n) {
923 stack[stack_pos] = next_node;
924 } else if (*(next_node + 1)) {
925 /* Follow up with the next possibility. */
928 /* Move to the next path. */
930 next_node = stack[--stack_pos];
932 stack[stack_pos] = next_node;
934 node = *next_node ? &graph[*next_node] : NULL;