drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c

   1 /*
   2  * drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
   3  * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
   4  * Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the names of the copyright holders nor the names of its
  15  *    contributors may be used to endorse or promote products derived from
  16  *    this software without specific prior written permission.
  17  *
  18  * Alternatively, this software may be distributed under the terms of the
  19  * GNU General Public License ("GPL") version 2 as published by the Free
  20  * Software Foundation.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/errno.h>
  37 #include <linux/netdevice.h>
  38 #include <net/net_namespace.h>
  39 #include <net/flow_dissector.h>
  40 #include <net/pkt_cls.h>
  41 #include <net/tc_act/tc_gact.h>
  42 #include <net/tc_act/tc_mirred.h>
  43 #include <net/tc_act/tc_vlan.h>
  44
  45 #include "spectrum.h"
  46 #include "core_acl_flex_keys.h"
  47
  48 static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
  49                                          struct mlxsw_sp_acl_block *block,
  50                                          struct mlxsw_sp_acl_rule_info *rulei,
  51                                          struct tcf_exts *exts)
  52 {
  53         const struct tc_action *a;
  54         LIST_HEAD(actions);
  55         int err;
  56
  57         if (!tcf_exts_has_actions(exts))
  58                 return 0;
  59
  60         /* Count action is inserted first */
  61         err = mlxsw_sp_acl_rulei_act_count(mlxsw_sp, rulei);
  62         if (err)
  63                 return err;
  64
  65         tcf_exts_to_list(exts, &actions);
  66         list_for_each_entry(a, &actions, list) {
  67                 if (is_tcf_gact_ok(a)) {
  68                         err = mlxsw_sp_acl_rulei_act_terminate(rulei);
  69                         if (err)
  70                                 return err;
  71                 } else if (is_tcf_gact_shot(a)) {
  72                         err = mlxsw_sp_acl_rulei_act_drop(rulei);
  73                         if (err)
  74                                 return err;
  75                 } else if (is_tcf_gact_trap(a)) {
  76                         err = mlxsw_sp_acl_rulei_act_trap(rulei);
  77                         if (err)
  78                                 return err;
  79                 } else if (is_tcf_gact_goto_chain(a)) {
  80                         u32 chain_index = tcf_gact_goto_chain_index(a);
  81                         struct mlxsw_sp_acl_ruleset *ruleset;
  82                         u16 group_id;
  83
  84                         ruleset = mlxsw_sp_acl_ruleset_lookup(mlxsw_sp, block,
  85                                                               chain_index,
  86                                                               MLXSW_SP_ACL_PROFILE_FLOWER);
  87                         if (IS_ERR(ruleset))
  88                                 return PTR_ERR(ruleset);
  89
  90                         group_id = mlxsw_sp_acl_ruleset_group_id(ruleset);
  91                         err = mlxsw_sp_acl_rulei_act_jump(rulei, group_id);
  92                         if (err)
  93                                 return err;
  94                 } else if (is_tcf_mirred_egress_redirect(a)) {
  95                         struct net_device *out_dev;
  96                         struct mlxsw_sp_fid *fid;
  97                         u16 fid_index;
  98
  99                         fid = mlxsw_sp_acl_dummy_fid(mlxsw_sp);
 100                         fid_index = mlxsw_sp_fid_index(fid);
 101                         err = mlxsw_sp_acl_rulei_act_fid_set(mlxsw_sp, rulei,
 102                                                              fid_index);
 103                         if (err)
 104                                 return err;
 105
 106                         out_dev = tcf_mirred_dev(a);
 107                         err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
 108                                                          out_dev);
 109                         if (err)
 110                                 return err;
 111                 } else if (is_tcf_mirred_egress_mirror(a)) {
 112                         struct net_device *out_dev = tcf_mirred_dev(a);
 113
 114                         err = mlxsw_sp_acl_rulei_act_mirror(mlxsw_sp, rulei,
 115                                                             block, out_dev);
 116                         if (err)
 117                                 return err;
 118                 } else if (is_tcf_vlan(a)) {
 119                         u16 proto = be16_to_cpu(tcf_vlan_push_proto(a));
 120                         u32 action = tcf_vlan_action(a);
 121                         u8 prio = tcf_vlan_push_prio(a);
 122                         u16 vid = tcf_vlan_push_vid(a);
 123
 124                         return mlxsw_sp_acl_rulei_act_vlan(mlxsw_sp, rulei,
 125                                                            action, vid,
 126                                                            proto, prio);
 127                 } else {
 128                         dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
 129                         return -EOPNOTSUPP;
 130                 }
 131         }
 132         return 0;
 133 }
 134
 135 static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
 136                                        struct tc_cls_flower_offload *f)
 137 {
 138         struct flow_dissector_key_ipv4_addrs *key =
 139                 skb_flow_dissector_target(f->dissector,
 140                                           FLOW_DISSECTOR_KEY_IPV4_ADDRS,
 141                                           f->key);
 142         struct flow_dissector_key_ipv4_addrs *mask =
 143                 skb_flow_dissector_target(f->dissector,
 144                                           FLOW_DISSECTOR_KEY_IPV4_ADDRS,
 145                                           f->mask);
 146
 147         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_IP4,
 148                                        ntohl(key->src), ntohl(mask->src));
 149         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_IP4,
 150                                        ntohl(key->dst), ntohl(mask->dst));
 151 }
 152
 153 static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
 154                                        struct tc_cls_flower_offload *f)
 155 {
 156         struct flow_dissector_key_ipv6_addrs *key =
 157                 skb_flow_dissector_target(f->dissector,
 158                                           FLOW_DISSECTOR_KEY_IPV6_ADDRS,
 159                                           f->key);
 160         struct flow_dissector_key_ipv6_addrs *mask =
 161                 skb_flow_dissector_target(f->dissector,
 162                                           FLOW_DISSECTOR_KEY_IPV6_ADDRS,
 163                                           f->mask);
 164         size_t addr_half_size = sizeof(key->src) / 2;
 165
 166         mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_HI,
 167                                        &key->src.s6_addr[0],
 168                                        &mask->src.s6_addr[0],
 169                                        addr_half_size);
 170         mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_LO,
 171                                        &key->src.s6_addr[addr_half_size],
 172                                        &mask->src.s6_addr[addr_half_size],
 173                                        addr_half_size);
 174         mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_HI,
 175                                        &key->dst.s6_addr[0],
 176                                        &mask->dst.s6_addr[0],
 177                                        addr_half_size);
 178         mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_LO,
 179                                        &key->dst.s6_addr[addr_half_size],
 180                                        &mask->dst.s6_addr[addr_half_size],
 181                                        addr_half_size);
 182 }
 183
 184 static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
 185                                        struct mlxsw_sp_acl_rule_info *rulei,
 186                                        struct tc_cls_flower_offload *f,
 187                                        u8 ip_proto)
 188 {
 189         struct flow_dissector_key_ports *key, *mask;
 190
 191         if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS))
 192                 return 0;
 193
 194         if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
 195                 dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
 196                 return -EINVAL;
 197         }
 198
 199         key = skb_flow_dissector_target(f->dissector,
 200                                         FLOW_DISSECTOR_KEY_PORTS,
 201                                         f->key);
 202         mask = skb_flow_dissector_target(f->dissector,
 203                                          FLOW_DISSECTOR_KEY_PORTS,
 204                                          f->mask);
 205         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
 206                                        ntohs(key->dst), ntohs(mask->dst));
 207         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
 208                                        ntohs(key->src), ntohs(mask->src));
 209         return 0;
 210 }
 211
 212 static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
 213                                      struct mlxsw_sp_acl_rule_info *rulei,
 214                                      struct tc_cls_flower_offload *f,
 215                                      u8 ip_proto)
 216 {
 217         struct flow_dissector_key_tcp *key, *mask;
 218
 219         if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_TCP))
 220                 return 0;
 221
 222         if (ip_proto != IPPROTO_TCP) {
 223                 dev_err(mlxsw_sp->bus_info->dev, "TCP keys supported only for TCP\n");
 224                 return -EINVAL;
 225         }
 226
 227         key = skb_flow_dissector_target(f->dissector,
 228                                         FLOW_DISSECTOR_KEY_TCP,
 229                                         f->key);
 230         mask = skb_flow_dissector_target(f->dissector,
 231                                          FLOW_DISSECTOR_KEY_TCP,
 232                                          f->mask);
 233         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_TCP_FLAGS,
 234                                        ntohs(key->flags), ntohs(mask->flags));
 235         return 0;
 236 }
 237
 238 static int mlxsw_sp_flower_parse_ip(struct mlxsw_sp *mlxsw_sp,
 239                                     struct mlxsw_sp_acl_rule_info *rulei,
 240                                     struct tc_cls_flower_offload *f,
 241                                     u16 n_proto)
 242 {
 243         struct flow_dissector_key_ip *key, *mask;
 244
 245         if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_IP))
 246                 return 0;
 247
 248         if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6) {
 249                 dev_err(mlxsw_sp->bus_info->dev, "IP keys supported only for IPv4/6\n");
 250                 return -EINVAL;
 251         }
 252
 253         key = skb_flow_dissector_target(f->dissector,
 254                                         FLOW_DISSECTOR_KEY_IP,
 255                                         f->key);
 256         mask = skb_flow_dissector_target(f->dissector,
 257                                          FLOW_DISSECTOR_KEY_IP,
 258                                          f->mask);
 259         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_TTL_,
 260                                        key->ttl, mask->ttl);
 261
 262         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_ECN,
 263                                        key->tos & 0x3, mask->tos & 0x3);
 264
 265         mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_DSCP,
 266                                        key->tos >> 6, mask->tos >> 6);
 267
 268         return 0;
 269 }
 270
 271 static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
 272                                  struct mlxsw_sp_acl_block *block,
 273                                  struct mlxsw_sp_acl_rule_info *rulei,
 274                                  struct tc_cls_flower_offload *f)
 275 {
 276         u16 n_proto_mask = 0;
 277         u16 n_proto_key = 0;
 278         u16 addr_type = 0;
 279         u8 ip_proto = 0;
 280         int err;
 281
 282         if (f->dissector->used_keys &
 283             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
 284               BIT(FLOW_DISSECTOR_KEY_BASIC) |
 285               BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
 286               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
 287               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
 288               BIT(FLOW_DISSECTOR_KEY_PORTS) |
 289               BIT(FLOW_DISSECTOR_KEY_TCP) |
 290               BIT(FLOW_DISSECTOR_KEY_IP) |
 291               BIT(FLOW_DISSECTOR_KEY_VLAN))) {
 292                 dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
 293                 return -EOPNOTSUPP;
 294         }
 295
 296         mlxsw_sp_acl_rulei_priority(rulei, f->common.prio);
 297
 298         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
 299                 struct flow_dissector_key_control *key =
 300                         skb_flow_dissector_target(f->dissector,
 301                                                   FLOW_DISSECTOR_KEY_CONTROL,
 302                                                   f->key);
 303                 addr_type = key->addr_type;
 304         }
 305
 306         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
 307                 struct flow_dissector_key_basic *key =
 308                         skb_flow_dissector_target(f->dissector,
 309                                                   FLOW_DISSECTOR_KEY_BASIC,
 310                                                   f->key);
 311                 struct flow_dissector_key_basic *mask =
 312                         skb_flow_dissector_target(f->dissector,
 313                                                   FLOW_DISSECTOR_KEY_BASIC,
 314                                                   f->mask);
 315                 n_proto_key = ntohs(key->n_proto);
 316                 n_proto_mask = ntohs(mask->n_proto);
 317
 318                 if (n_proto_key == ETH_P_ALL) {
 319                         n_proto_key = 0;
 320                         n_proto_mask = 0;
 321                 }
 322                 mlxsw_sp_acl_rulei_keymask_u32(rulei,
 323                                                MLXSW_AFK_ELEMENT_ETHERTYPE,
 324                                                n_proto_key, n_proto_mask);
 325
 326                 ip_proto = key->ip_proto;
 327                 mlxsw_sp_acl_rulei_keymask_u32(rulei,
 328                                                MLXSW_AFK_ELEMENT_IP_PROTO,
 329                                                key->ip_proto, mask->ip_proto);
 330         }
 331
 332         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
 333                 struct flow_dissector_key_eth_addrs *key =
 334                         skb_flow_dissector_target(f->dissector,
 335                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
 336                                                   f->key);
 337                 struct flow_dissector_key_eth_addrs *mask =
 338                         skb_flow_dissector_target(f->dissector,
 339                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
 340                                                   f->mask);
 341
 342                 mlxsw_sp_acl_rulei_keymask_buf(rulei,
 343                                                MLXSW_AFK_ELEMENT_DMAC,
 344                                                key->dst, mask->dst,
 345                                                sizeof(key->dst));
 346                 mlxsw_sp_acl_rulei_keymask_buf(rulei,
 347                                                MLXSW_AFK_ELEMENT_SMAC,
 348                                                key->src, mask->src,
 349                                                sizeof(key->src));
 350         }
 351
 352         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
 353                 struct flow_dissector_key_vlan *key =
 354                         skb_flow_dissector_target(f->dissector,
 355                                                   FLOW_DISSECTOR_KEY_VLAN,
 356                                                   f->key);
 357                 struct flow_dissector_key_vlan *mask =
 358                         skb_flow_dissector_target(f->dissector,
 359                                                   FLOW_DISSECTOR_KEY_VLAN,
 360                                                   f->mask);
 361                 if (mask->vlan_id != 0)
 362                         mlxsw_sp_acl_rulei_keymask_u32(rulei,
 363                                                        MLXSW_AFK_ELEMENT_VID,
 364                                                        key->vlan_id,
 365                                                        mask->vlan_id);
 366                 if (mask->vlan_priority != 0)
 367                         mlxsw_sp_acl_rulei_keymask_u32(rulei,
 368                                                        MLXSW_AFK_ELEMENT_PCP,
 369                                                        key->vlan_priority,
 370                                                        mask->vlan_priority);
 371         }
 372
 373         if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
 374                 mlxsw_sp_flower_parse_ipv4(rulei, f);
 375
 376         if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
 377                 mlxsw_sp_flower_parse_ipv6(rulei, f);
 378
 379         err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
 380         if (err)
 381                 return err;
 382         err = mlxsw_sp_flower_parse_tcp(mlxsw_sp, rulei, f, ip_proto);
 383         if (err)
 384                 return err;
 385
 386         err = mlxsw_sp_flower_parse_ip(mlxsw_sp, rulei, f, n_proto_key & n_proto_mask);
 387         if (err)
 388                 return err;
 389
 390         return mlxsw_sp_flower_parse_actions(mlxsw_sp, block, rulei, f->exts);
 391 }
 392
 393 int mlxsw_sp_flower_replace(struct mlxsw_sp *mlxsw_sp,
 394                             struct mlxsw_sp_acl_block *block,
 395                             struct tc_cls_flower_offload *f)
 396 {
 397         struct mlxsw_sp_acl_rule_info *rulei;
 398         struct mlxsw_sp_acl_ruleset *ruleset;
 399         struct mlxsw_sp_acl_rule *rule;
 400         int err;
 401
 402         ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
 403                                            f->common.chain_index,
 404                                            MLXSW_SP_ACL_PROFILE_FLOWER);
 405         if (IS_ERR(ruleset))
 406                 return PTR_ERR(ruleset);
 407
 408         rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie);
 409         if (IS_ERR(rule)) {
 410                 err = PTR_ERR(rule);
 411                 goto err_rule_create;
 412         }
 413
 414         rulei = mlxsw_sp_acl_rule_rulei(rule);
 415         err = mlxsw_sp_flower_parse(mlxsw_sp, block, rulei, f);
 416         if (err)
 417                 goto err_flower_parse;
 418
 419         err = mlxsw_sp_acl_rulei_commit(rulei);
 420         if (err)
 421                 goto err_rulei_commit;
 422
 423         err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
 424         if (err)
 425                 goto err_rule_add;
 426
 427         mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
 428         return 0;
 429
 430 err_rule_add:
 431 err_rulei_commit:
 432 err_flower_parse:
 433         mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
 434 err_rule_create:
 435         mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
 436         return err;
 437 }
 438
 439 void mlxsw_sp_flower_destroy(struct mlxsw_sp *mlxsw_sp,
 440                              struct mlxsw_sp_acl_block *block,
 441                              struct tc_cls_flower_offload *f)
 442 {
 443         struct mlxsw_sp_acl_ruleset *ruleset;
 444         struct mlxsw_sp_acl_rule *rule;
 445
 446         ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
 447                                            f->common.chain_index,
 448                                            MLXSW_SP_ACL_PROFILE_FLOWER);
 449         if (IS_ERR(ruleset))
 450                 return;
 451
 452         rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
 453         if (rule) {
 454                 mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
 455                 mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
 456         }
 457
 458         mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
 459 }
 460
 461 int mlxsw_sp_flower_stats(struct mlxsw_sp *mlxsw_sp,
 462                           struct mlxsw_sp_acl_block *block,
 463                           struct tc_cls_flower_offload *f)
 464 {
 465         struct mlxsw_sp_acl_ruleset *ruleset;
 466         struct mlxsw_sp_acl_rule *rule;
 467         u64 packets;
 468         u64 lastuse;
 469         u64 bytes;
 470         int err;
 471
 472         ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
 473                                            f->common.chain_index,
 474                                            MLXSW_SP_ACL_PROFILE_FLOWER);
 475         if (WARN_ON(IS_ERR(ruleset)))
 476                 return -EINVAL;
 477
 478         rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
 479         if (!rule)
 480                 return -EINVAL;
 481
 482         err = mlxsw_sp_acl_rule_get_stats(mlxsw_sp, rule, &packets, &bytes,
 483                                           &lastuse);
 484         if (err)
 485                 goto err_rule_get_stats;
 486
 487         tcf_exts_stats_update(f->exts, bytes, packets, lastuse);
 488
 489         mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
 490         return 0;
 491
 492 err_rule_get_stats:
 493         mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
 494         return err;
 495 }