2 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/hash.h>
34 #include <linux/mlx5/fs.h>
36 #include <linux/ipv6.h>
39 #define ARFS_HASH_SHIFT BITS_PER_BYTE
40 #define ARFS_HASH_SIZE BIT(BITS_PER_BYTE)
43 struct mlx5e_flow_table ft;
44 struct mlx5_flow_handle *default_rule;
45 struct hlist_head rules_hash[ARFS_HASH_SIZE];
56 struct mlx5e_arfs_tables {
57 struct arfs_table arfs_tables[ARFS_NUM_TYPES];
58 /* Protect aRFS rules list */
61 struct workqueue_struct *wq;
69 struct in6_addr src_ipv6;
73 struct in6_addr dst_ipv6;
80 struct mlx5e_priv *priv;
81 struct work_struct arfs_work;
82 struct mlx5_flow_handle *rule;
83 struct hlist_node hlist;
85 /* Flow ID passed to ndo_rx_flow_steer */
87 /* Filter ID returned by ndo_rx_flow_steer */
89 struct arfs_tuple tuple;
92 #define mlx5e_for_each_arfs_rule(hn, tmp, arfs_tables, i, j) \
93 for (i = 0; i < ARFS_NUM_TYPES; i++) \
94 mlx5e_for_each_hash_arfs_rule(hn, tmp, arfs_tables[i].rules_hash, j)
96 #define mlx5e_for_each_hash_arfs_rule(hn, tmp, hash, j) \
97 for (j = 0; j < ARFS_HASH_SIZE; j++) \
98 hlist_for_each_entry_safe(hn, tmp, &hash[j], hlist)
100 static enum mlx5_traffic_types arfs_get_tt(enum arfs_type type)
104 return MLX5_TT_IPV4_TCP;
106 return MLX5_TT_IPV4_UDP;
108 return MLX5_TT_IPV6_TCP;
110 return MLX5_TT_IPV6_UDP;
116 static int arfs_disable(struct mlx5e_flow_steering *fs)
118 struct mlx5_ttc_table *ttc = mlx5e_fs_get_ttc(fs, false);
121 for (i = 0; i < ARFS_NUM_TYPES; i++) {
122 /* Modify ttc rules destination back to their default */
123 err = mlx5_ttc_fwd_default_dest(ttc, arfs_get_tt(i));
126 "%s: modify ttc[%d] default destination failed, err(%d)\n",
127 __func__, arfs_get_tt(i), err);
134 static void arfs_del_rules(struct mlx5e_flow_steering *fs);
136 int mlx5e_arfs_disable(struct mlx5e_flow_steering *fs)
140 return arfs_disable(fs);
143 int mlx5e_arfs_enable(struct mlx5e_flow_steering *fs)
145 struct mlx5_ttc_table *ttc = mlx5e_fs_get_ttc(fs, false);
146 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
147 struct mlx5_flow_destination dest = {};
150 dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
151 for (i = 0; i < ARFS_NUM_TYPES; i++) {
152 dest.ft = arfs->arfs_tables[i].ft.t;
153 /* Modify ttc rules destination to point on the aRFS FTs */
154 err = mlx5_ttc_fwd_dest(ttc, arfs_get_tt(i), &dest);
156 fs_err(fs, "%s: modify ttc[%d] dest to arfs, failed err(%d)\n",
157 __func__, arfs_get_tt(i), err);
165 static void arfs_destroy_table(struct arfs_table *arfs_t)
167 mlx5_del_flow_rules(arfs_t->default_rule);
168 mlx5e_destroy_flow_table(&arfs_t->ft);
171 static void _mlx5e_cleanup_tables(struct mlx5e_flow_steering *fs)
173 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
177 destroy_workqueue(arfs->wq);
178 for (i = 0; i < ARFS_NUM_TYPES; i++) {
179 if (!IS_ERR_OR_NULL(arfs->arfs_tables[i].ft.t))
180 arfs_destroy_table(&arfs->arfs_tables[i]);
184 void mlx5e_arfs_destroy_tables(struct mlx5e_flow_steering *fs, bool ntuple)
186 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
191 _mlx5e_cleanup_tables(fs);
192 mlx5e_fs_set_arfs(fs, NULL);
196 static int arfs_add_default_rule(struct mlx5e_flow_steering *fs,
197 struct mlx5e_rx_res *rx_res,
200 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
201 struct arfs_table *arfs_t = &arfs->arfs_tables[type];
202 struct mlx5_flow_destination dest = {};
203 MLX5_DECLARE_FLOW_ACT(flow_act);
204 enum mlx5_traffic_types tt;
207 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
208 tt = arfs_get_tt(type);
210 fs_err(fs, "%s: bad arfs_type: %d\n", __func__, type);
214 /* FIXME: Must use mlx5_ttc_get_default_dest(),
215 * but can't since TTC default is not setup yet !
217 dest.tir_num = mlx5e_rx_res_get_tirn_rss(rx_res, tt);
218 arfs_t->default_rule = mlx5_add_flow_rules(arfs_t->ft.t, NULL,
221 if (IS_ERR(arfs_t->default_rule)) {
222 err = PTR_ERR(arfs_t->default_rule);
223 arfs_t->default_rule = NULL;
224 fs_err(fs, "%s: add rule failed, arfs type=%d\n", __func__, type);
230 #define MLX5E_ARFS_NUM_GROUPS 2
231 #define MLX5E_ARFS_GROUP1_SIZE (BIT(16) - 1)
232 #define MLX5E_ARFS_GROUP2_SIZE BIT(0)
233 #define MLX5E_ARFS_TABLE_SIZE (MLX5E_ARFS_GROUP1_SIZE +\
234 MLX5E_ARFS_GROUP2_SIZE)
235 static int arfs_create_groups(struct mlx5e_flow_table *ft,
238 int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
239 void *outer_headers_c;
245 ft->g = kcalloc(MLX5E_ARFS_NUM_GROUPS,
246 sizeof(*ft->g), GFP_KERNEL);
247 in = kvzalloc(inlen, GFP_KERNEL);
254 mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
255 outer_headers_c = MLX5_ADDR_OF(fte_match_param, mc,
257 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, ethertype);
261 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_dport);
262 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_sport);
266 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_dport);
267 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_sport);
277 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
278 src_ipv4_src_ipv6.ipv4_layout.ipv4);
279 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
280 dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
284 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
285 src_ipv4_src_ipv6.ipv6_layout.ipv6),
287 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
288 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
296 MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
297 MLX5_SET_CFG(in, start_flow_index, ix);
298 ix += MLX5E_ARFS_GROUP1_SIZE;
299 MLX5_SET_CFG(in, end_flow_index, ix - 1);
300 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
301 if (IS_ERR(ft->g[ft->num_groups]))
305 memset(in, 0, inlen);
306 MLX5_SET_CFG(in, start_flow_index, ix);
307 ix += MLX5E_ARFS_GROUP2_SIZE;
308 MLX5_SET_CFG(in, end_flow_index, ix - 1);
309 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
310 if (IS_ERR(ft->g[ft->num_groups]))
318 err = PTR_ERR(ft->g[ft->num_groups]);
319 ft->g[ft->num_groups] = NULL;
326 static int arfs_create_table(struct mlx5e_flow_steering *fs,
327 struct mlx5e_rx_res *rx_res,
330 struct mlx5_flow_namespace *ns = mlx5e_fs_get_ns(fs, false);
331 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
332 struct mlx5e_flow_table *ft = &arfs->arfs_tables[type].ft;
333 struct mlx5_flow_table_attr ft_attr = {};
338 ft_attr.max_fte = MLX5E_ARFS_TABLE_SIZE;
339 ft_attr.level = MLX5E_ARFS_FT_LEVEL;
340 ft_attr.prio = MLX5E_NIC_PRIO;
342 ft->t = mlx5_create_flow_table(ns, &ft_attr);
344 err = PTR_ERR(ft->t);
349 err = arfs_create_groups(ft, type);
353 err = arfs_add_default_rule(fs, rx_res, type);
359 mlx5e_destroy_flow_table(ft);
363 int mlx5e_arfs_create_tables(struct mlx5e_flow_steering *fs,
364 struct mlx5e_rx_res *rx_res, bool ntuple)
366 struct mlx5e_arfs_tables *arfs;
373 arfs = kvzalloc(sizeof(*arfs), GFP_KERNEL);
377 spin_lock_init(&arfs->arfs_lock);
378 arfs->wq = create_singlethread_workqueue("mlx5e_arfs");
382 mlx5e_fs_set_arfs(fs, arfs);
384 for (i = 0; i < ARFS_NUM_TYPES; i++) {
385 err = arfs_create_table(fs, rx_res, i);
392 _mlx5e_cleanup_tables(fs);
394 mlx5e_fs_set_arfs(fs, NULL);
399 #define MLX5E_ARFS_EXPIRY_QUOTA 60
401 static void arfs_may_expire_flow(struct mlx5e_priv *priv)
403 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(priv->fs);
404 struct arfs_rule *arfs_rule;
405 struct hlist_node *htmp;
406 HLIST_HEAD(del_list);
411 spin_lock_bh(&arfs->arfs_lock);
412 mlx5e_for_each_arfs_rule(arfs_rule, htmp, arfs->arfs_tables, i, j) {
413 if (!work_pending(&arfs_rule->arfs_work) &&
414 rps_may_expire_flow(priv->netdev,
415 arfs_rule->rxq, arfs_rule->flow_id,
416 arfs_rule->filter_id)) {
417 hlist_del_init(&arfs_rule->hlist);
418 hlist_add_head(&arfs_rule->hlist, &del_list);
419 if (quota++ > MLX5E_ARFS_EXPIRY_QUOTA)
423 spin_unlock_bh(&arfs->arfs_lock);
424 hlist_for_each_entry_safe(arfs_rule, htmp, &del_list, hlist) {
426 mlx5_del_flow_rules(arfs_rule->rule);
427 hlist_del(&arfs_rule->hlist);
432 static void arfs_del_rules(struct mlx5e_flow_steering *fs)
434 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(fs);
435 struct hlist_node *htmp;
436 struct arfs_rule *rule;
437 HLIST_HEAD(del_list);
441 spin_lock_bh(&arfs->arfs_lock);
442 mlx5e_for_each_arfs_rule(rule, htmp, arfs->arfs_tables, i, j) {
443 hlist_del_init(&rule->hlist);
444 hlist_add_head(&rule->hlist, &del_list);
446 spin_unlock_bh(&arfs->arfs_lock);
448 hlist_for_each_entry_safe(rule, htmp, &del_list, hlist) {
449 cancel_work_sync(&rule->arfs_work);
451 mlx5_del_flow_rules(rule->rule);
452 hlist_del(&rule->hlist);
457 static struct hlist_head *
458 arfs_hash_bucket(struct arfs_table *arfs_t, __be16 src_port,
464 l = (__force unsigned long)src_port |
465 ((__force unsigned long)dst_port << 2);
467 bucket_idx = hash_long(l, ARFS_HASH_SHIFT);
469 return &arfs_t->rules_hash[bucket_idx];
472 static struct arfs_table *arfs_get_table(struct mlx5e_arfs_tables *arfs,
473 u8 ip_proto, __be16 etype)
475 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_TCP)
476 return &arfs->arfs_tables[ARFS_IPV4_TCP];
477 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_UDP)
478 return &arfs->arfs_tables[ARFS_IPV4_UDP];
479 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_TCP)
480 return &arfs->arfs_tables[ARFS_IPV6_TCP];
481 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_UDP)
482 return &arfs->arfs_tables[ARFS_IPV6_UDP];
487 static struct mlx5_flow_handle *arfs_add_rule(struct mlx5e_priv *priv,
488 struct arfs_rule *arfs_rule)
490 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(priv->fs);
491 struct arfs_tuple *tuple = &arfs_rule->tuple;
492 struct mlx5_flow_handle *rule = NULL;
493 struct mlx5_flow_destination dest = {};
494 MLX5_DECLARE_FLOW_ACT(flow_act);
495 struct arfs_table *arfs_table;
496 struct mlx5_flow_spec *spec;
497 struct mlx5_flow_table *ft;
500 spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
505 spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
506 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
507 outer_headers.ethertype);
508 MLX5_SET(fte_match_param, spec->match_value, outer_headers.ethertype,
509 ntohs(tuple->etype));
510 arfs_table = arfs_get_table(arfs, tuple->ip_proto, tuple->etype);
516 ft = arfs_table->ft.t;
517 if (tuple->ip_proto == IPPROTO_TCP) {
518 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
519 outer_headers.tcp_dport);
520 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
521 outer_headers.tcp_sport);
522 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_dport,
523 ntohs(tuple->dst_port));
524 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_sport,
525 ntohs(tuple->src_port));
527 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
528 outer_headers.udp_dport);
529 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
530 outer_headers.udp_sport);
531 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_dport,
532 ntohs(tuple->dst_port));
533 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_sport,
534 ntohs(tuple->src_port));
536 if (tuple->etype == htons(ETH_P_IP)) {
537 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
538 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4),
541 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
542 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
545 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
546 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4);
547 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
548 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
550 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
551 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
554 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
555 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
558 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
559 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
562 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
563 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
567 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
568 dest.tir_num = mlx5e_rx_res_get_tirn_direct(priv->rx_res, arfs_rule->rxq);
569 rule = mlx5_add_flow_rules(ft, spec, &flow_act, &dest, 1);
572 priv->channel_stats[arfs_rule->rxq]->rq.arfs_err++;
573 netdev_dbg(priv->netdev,
574 "%s: add rule(filter id=%d, rq idx=%d, ip proto=0x%x) failed,err=%d\n",
575 __func__, arfs_rule->filter_id, arfs_rule->rxq,
576 tuple->ip_proto, err);
581 return err ? ERR_PTR(err) : rule;
584 static void arfs_modify_rule_rq(struct mlx5e_priv *priv,
585 struct mlx5_flow_handle *rule, u16 rxq)
587 struct mlx5_flow_destination dst = {};
590 dst.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
591 dst.tir_num = mlx5e_rx_res_get_tirn_direct(priv->rx_res, rxq);
592 err = mlx5_modify_rule_destination(rule, &dst, NULL);
594 netdev_warn(priv->netdev,
595 "Failed to modify aRFS rule destination to rq=%d\n", rxq);
598 static void arfs_handle_work(struct work_struct *work)
600 struct arfs_rule *arfs_rule = container_of(work,
603 struct mlx5e_priv *priv = arfs_rule->priv;
604 struct mlx5e_arfs_tables *arfs;
605 struct mlx5_flow_handle *rule;
607 arfs = mlx5e_fs_get_arfs(priv->fs);
608 mutex_lock(&priv->state_lock);
609 if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
610 spin_lock_bh(&arfs->arfs_lock);
611 hlist_del(&arfs_rule->hlist);
612 spin_unlock_bh(&arfs->arfs_lock);
614 mutex_unlock(&priv->state_lock);
618 mutex_unlock(&priv->state_lock);
620 if (!arfs_rule->rule) {
621 rule = arfs_add_rule(priv, arfs_rule);
624 arfs_rule->rule = rule;
626 arfs_modify_rule_rq(priv, arfs_rule->rule,
630 arfs_may_expire_flow(priv);
633 static struct arfs_rule *arfs_alloc_rule(struct mlx5e_priv *priv,
634 struct arfs_table *arfs_t,
635 const struct flow_keys *fk,
636 u16 rxq, u32 flow_id)
638 struct mlx5e_arfs_tables *arfs = mlx5e_fs_get_arfs(priv->fs);
639 struct arfs_rule *rule;
640 struct arfs_tuple *tuple;
642 rule = kzalloc(sizeof(*rule), GFP_ATOMIC);
648 INIT_WORK(&rule->arfs_work, arfs_handle_work);
650 tuple = &rule->tuple;
651 tuple->etype = fk->basic.n_proto;
652 tuple->ip_proto = fk->basic.ip_proto;
653 if (tuple->etype == htons(ETH_P_IP)) {
654 tuple->src_ipv4 = fk->addrs.v4addrs.src;
655 tuple->dst_ipv4 = fk->addrs.v4addrs.dst;
657 memcpy(&tuple->src_ipv6, &fk->addrs.v6addrs.src,
658 sizeof(struct in6_addr));
659 memcpy(&tuple->dst_ipv6, &fk->addrs.v6addrs.dst,
660 sizeof(struct in6_addr));
662 tuple->src_port = fk->ports.src;
663 tuple->dst_port = fk->ports.dst;
665 rule->flow_id = flow_id;
666 rule->filter_id = arfs->last_filter_id++ % RPS_NO_FILTER;
668 hlist_add_head(&rule->hlist,
669 arfs_hash_bucket(arfs_t, tuple->src_port,
674 static bool arfs_cmp(const struct arfs_tuple *tuple, const struct flow_keys *fk)
676 if (tuple->src_port != fk->ports.src || tuple->dst_port != fk->ports.dst)
678 if (tuple->etype != fk->basic.n_proto)
680 if (tuple->etype == htons(ETH_P_IP))
681 return tuple->src_ipv4 == fk->addrs.v4addrs.src &&
682 tuple->dst_ipv4 == fk->addrs.v4addrs.dst;
683 if (tuple->etype == htons(ETH_P_IPV6))
684 return !memcmp(&tuple->src_ipv6, &fk->addrs.v6addrs.src,
685 sizeof(struct in6_addr)) &&
686 !memcmp(&tuple->dst_ipv6, &fk->addrs.v6addrs.dst,
687 sizeof(struct in6_addr));
691 static struct arfs_rule *arfs_find_rule(struct arfs_table *arfs_t,
692 const struct flow_keys *fk)
694 struct arfs_rule *arfs_rule;
695 struct hlist_head *head;
697 head = arfs_hash_bucket(arfs_t, fk->ports.src, fk->ports.dst);
698 hlist_for_each_entry(arfs_rule, head, hlist) {
699 if (arfs_cmp(&arfs_rule->tuple, fk))
706 int mlx5e_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
707 u16 rxq_index, u32 flow_id)
709 struct mlx5e_priv *priv = netdev_priv(dev);
710 struct mlx5e_arfs_tables *arfs;
711 struct arfs_rule *arfs_rule;
712 struct arfs_table *arfs_t;
715 arfs = mlx5e_fs_get_arfs(priv->fs);
716 if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
717 return -EPROTONOSUPPORT;
719 if (fk.basic.n_proto != htons(ETH_P_IP) &&
720 fk.basic.n_proto != htons(ETH_P_IPV6))
721 return -EPROTONOSUPPORT;
723 if (skb->encapsulation)
724 return -EPROTONOSUPPORT;
726 arfs_t = arfs_get_table(arfs, fk.basic.ip_proto, fk.basic.n_proto);
728 return -EPROTONOSUPPORT;
730 spin_lock_bh(&arfs->arfs_lock);
731 arfs_rule = arfs_find_rule(arfs_t, &fk);
733 if (arfs_rule->rxq == rxq_index) {
734 spin_unlock_bh(&arfs->arfs_lock);
735 return arfs_rule->filter_id;
737 arfs_rule->rxq = rxq_index;
739 arfs_rule = arfs_alloc_rule(priv, arfs_t, &fk, rxq_index, flow_id);
741 spin_unlock_bh(&arfs->arfs_lock);
745 queue_work(arfs->wq, &arfs_rule->arfs_work);
746 spin_unlock_bh(&arfs->arfs_lock);
747 return arfs_rule->filter_id;