drivers/net/netdevsim/bpf.c

   1 /*
   2  * Copyright (C) 2017 Netronome Systems, Inc.
   3  *
   4  * This software is licensed under the GNU General License Version 2,
   5  * June 1991 as shown in the file COPYING in the top-level directory of this
   6  * source tree.
   7  *
   8  * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
   9  * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  10  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  11  * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
  12  * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
  13  * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  14  */
  15
  16 #include <linux/bpf.h>
  17 #include <linux/bpf_verifier.h>
  18 #include <linux/debugfs.h>
  19 #include <linux/kernel.h>
  20 #include <linux/mutex.h>
  21 #include <linux/rtnetlink.h>
  22 #include <net/pkt_cls.h>
  23
  24 #include "netdevsim.h"
  25
  26 #define pr_vlog(env, fmt, ...)  \
  27         bpf_verifier_log_write(env, "[netdevsim] " fmt, ##__VA_ARGS__)
  28
  29 struct nsim_bpf_bound_prog {
  30         struct nsim_dev *nsim_dev;
  31         struct bpf_prog *prog;
  32         struct dentry *ddir;
  33         const char *state;
  34         bool is_loaded;
  35         struct list_head l;
  36 };
  37
  38 #define NSIM_BPF_MAX_KEYS               2
  39
  40 struct nsim_bpf_bound_map {
  41         struct netdevsim *ns;
  42         struct bpf_offloaded_map *map;
  43         struct mutex mutex;
  44         struct nsim_map_entry {
  45                 void *key;
  46                 void *value;
  47         } entry[NSIM_BPF_MAX_KEYS];
  48         struct list_head l;
  49 };
  50
  51 static int nsim_bpf_string_show(struct seq_file *file, void *data)
  52 {
  53         const char **str = file->private;
  54
  55         if (*str)
  56                 seq_printf(file, "%s\n", *str);
  57
  58         return 0;
  59 }
  60 DEFINE_SHOW_ATTRIBUTE(nsim_bpf_string);
  61
  62 static int
  63 nsim_bpf_verify_insn(struct bpf_verifier_env *env, int insn_idx, int prev_insn)
  64 {
  65         struct nsim_bpf_bound_prog *state;
  66         int ret = 0;
  67
  68         state = env->prog->aux->offload->dev_priv;
  69         if (state->nsim_dev->bpf_bind_verifier_delay && !insn_idx)
  70                 msleep(state->nsim_dev->bpf_bind_verifier_delay);
  71
  72         if (insn_idx == env->prog->len - 1) {
  73                 pr_vlog(env, "Hello from netdevsim!\n");
  74
  75                 if (!state->nsim_dev->bpf_bind_verifier_accept)
  76                         ret = -EOPNOTSUPP;
  77         }
  78
  79         return ret;
  80 }
  81
  82 static int nsim_bpf_finalize(struct bpf_verifier_env *env)
  83 {
  84         return 0;
  85 }
  86
  87 static bool nsim_xdp_offload_active(struct netdevsim *ns)
  88 {
  89         return ns->xdp_hw.prog;
  90 }
  91
  92 static void nsim_prog_set_loaded(struct bpf_prog *prog, bool loaded)
  93 {
  94         struct nsim_bpf_bound_prog *state;
  95
  96         if (!prog || !prog->aux->offload)
  97                 return;
  98
  99         state = prog->aux->offload->dev_priv;
 100         state->is_loaded = loaded;
 101 }
 102
 103 static int
 104 nsim_bpf_offload(struct netdevsim *ns, struct bpf_prog *prog, bool oldprog)
 105 {
 106         nsim_prog_set_loaded(ns->bpf_offloaded, false);
 107
 108         WARN(!!ns->bpf_offloaded != oldprog,
 109              "bad offload state, expected offload %sto be active",
 110              oldprog ? "" : "not ");
 111         ns->bpf_offloaded = prog;
 112         ns->bpf_offloaded_id = prog ? prog->aux->id : 0;
 113         nsim_prog_set_loaded(prog, true);
 114
 115         return 0;
 116 }
 117
 118 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
 119                                void *type_data, void *cb_priv)
 120 {
 121         struct tc_cls_bpf_offload *cls_bpf = type_data;
 122         struct bpf_prog *prog = cls_bpf->prog;
 123         struct netdevsim *ns = cb_priv;
 124         struct bpf_prog *oldprog;
 125
 126         if (type != TC_SETUP_CLSBPF) {
 127                 NSIM_EA(cls_bpf->common.extack,
 128                         "only offload of BPF classifiers supported");
 129                 return -EOPNOTSUPP;
 130         }
 131
 132         if (!tc_cls_can_offload_and_chain0(ns->netdev, &cls_bpf->common))
 133                 return -EOPNOTSUPP;
 134
 135         if (cls_bpf->common.protocol != htons(ETH_P_ALL)) {
 136                 NSIM_EA(cls_bpf->common.extack,
 137                         "only ETH_P_ALL supported as filter protocol");
 138                 return -EOPNOTSUPP;
 139         }
 140
 141         if (!ns->bpf_tc_accept) {
 142                 NSIM_EA(cls_bpf->common.extack,
 143                         "netdevsim configured to reject BPF TC offload");
 144                 return -EOPNOTSUPP;
 145         }
 146         /* Note: progs without skip_sw will probably not be dev bound */
 147         if (prog && !prog->aux->offload && !ns->bpf_tc_non_bound_accept) {
 148                 NSIM_EA(cls_bpf->common.extack,
 149                         "netdevsim configured to reject unbound programs");
 150                 return -EOPNOTSUPP;
 151         }
 152
 153         if (cls_bpf->command != TC_CLSBPF_OFFLOAD)
 154                 return -EOPNOTSUPP;
 155
 156         oldprog = cls_bpf->oldprog;
 157
 158         /* Don't remove if oldprog doesn't match driver's state */
 159         if (ns->bpf_offloaded != oldprog) {
 160                 oldprog = NULL;
 161                 if (!cls_bpf->prog)
 162                         return 0;
 163                 if (ns->bpf_offloaded) {
 164                         NSIM_EA(cls_bpf->common.extack,
 165                                 "driver and netdev offload states mismatch");
 166                         return -EBUSY;
 167                 }
 168         }
 169
 170         return nsim_bpf_offload(ns, cls_bpf->prog, oldprog);
 171 }
 172
 173 int nsim_bpf_disable_tc(struct netdevsim *ns)
 174 {
 175         if (ns->bpf_offloaded && !nsim_xdp_offload_active(ns))
 176                 return -EBUSY;
 177         return 0;
 178 }
 179
 180 static int nsim_xdp_offload_prog(struct netdevsim *ns, struct netdev_bpf *bpf)
 181 {
 182         if (!nsim_xdp_offload_active(ns) && !bpf->prog)
 183                 return 0;
 184         if (!nsim_xdp_offload_active(ns) && bpf->prog && ns->bpf_offloaded) {
 185                 NSIM_EA(bpf->extack, "TC program is already loaded");
 186                 return -EBUSY;
 187         }
 188
 189         return nsim_bpf_offload(ns, bpf->prog, nsim_xdp_offload_active(ns));
 190 }
 191
 192 static int
 193 nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf,
 194                   struct xdp_attachment_info *xdp)
 195 {
 196         int err;
 197
 198         if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) {
 199                 NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS");
 200                 return -EOPNOTSUPP;
 201         }
 202         if (bpf->command == XDP_SETUP_PROG_HW && !ns->bpf_xdpoffload_accept) {
 203                 NSIM_EA(bpf->extack, "XDP offload disabled in DebugFS");
 204                 return -EOPNOTSUPP;
 205         }
 206
 207         if (bpf->command == XDP_SETUP_PROG_HW) {
 208                 err = nsim_xdp_offload_prog(ns, bpf);
 209                 if (err)
 210                         return err;
 211         }
 212
 213         xdp_attachment_setup(xdp, bpf);
 214
 215         return 0;
 216 }
 217
 218 static int nsim_bpf_create_prog(struct nsim_dev *nsim_dev,
 219                                 struct bpf_prog *prog)
 220 {
 221         struct nsim_bpf_bound_prog *state;
 222         char name[16];
 223         int ret;
 224
 225         state = kzalloc(sizeof(*state), GFP_KERNEL);
 226         if (!state)
 227                 return -ENOMEM;
 228
 229         state->nsim_dev = nsim_dev;
 230         state->prog = prog;
 231         state->state = "verify";
 232
 233         /* Program id is not populated yet when we create the state. */
 234         sprintf(name, "%u", nsim_dev->prog_id_gen++);
 235         state->ddir = debugfs_create_dir(name, nsim_dev->ddir_bpf_bound_progs);
 236         if (IS_ERR(state->ddir)) {
 237                 ret = PTR_ERR(state->ddir);
 238                 kfree(state);
 239                 return ret;
 240         }
 241
 242         debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id);
 243         debugfs_create_file("state", 0400, state->ddir,
 244                             &state->state, &nsim_bpf_string_fops);
 245         debugfs_create_bool("loaded", 0400, state->ddir, &state->is_loaded);
 246
 247         list_add_tail(&state->l, &nsim_dev->bpf_bound_progs);
 248
 249         prog->aux->offload->dev_priv = state;
 250
 251         return 0;
 252 }
 253
 254 static int nsim_bpf_verifier_prep(struct bpf_prog *prog)
 255 {
 256         struct nsim_dev *nsim_dev =
 257                         bpf_offload_dev_priv(prog->aux->offload->offdev);
 258
 259         if (!nsim_dev->bpf_bind_accept)
 260                 return -EOPNOTSUPP;
 261
 262         return nsim_bpf_create_prog(nsim_dev, prog);
 263 }
 264
 265 static int nsim_bpf_translate(struct bpf_prog *prog)
 266 {
 267         struct nsim_bpf_bound_prog *state = prog->aux->offload->dev_priv;
 268
 269         state->state = "xlated";
 270         return 0;
 271 }
 272
 273 static void nsim_bpf_destroy_prog(struct bpf_prog *prog)
 274 {
 275         struct nsim_bpf_bound_prog *state;
 276
 277         state = prog->aux->offload->dev_priv;
 278         WARN(state->is_loaded,
 279              "offload state destroyed while program still bound");
 280         debugfs_remove_recursive(state->ddir);
 281         list_del(&state->l);
 282         kfree(state);
 283 }
 284
 285 static const struct bpf_prog_offload_ops nsim_bpf_dev_ops = {
 286         .insn_hook      = nsim_bpf_verify_insn,
 287         .finalize       = nsim_bpf_finalize,
 288         .prepare        = nsim_bpf_verifier_prep,
 289         .translate      = nsim_bpf_translate,
 290         .destroy        = nsim_bpf_destroy_prog,
 291 };
 292
 293 static int nsim_setup_prog_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
 294 {
 295         if (bpf->prog && bpf->prog->aux->offload) {
 296                 NSIM_EA(bpf->extack, "attempt to load offloaded prog to drv");
 297                 return -EINVAL;
 298         }
 299         if (ns->netdev->mtu > NSIM_XDP_MAX_MTU) {
 300                 NSIM_EA(bpf->extack, "MTU too large w/ XDP enabled");
 301                 return -EINVAL;
 302         }
 303         return 0;
 304 }
 305
 306 static int
 307 nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
 308 {
 309         struct nsim_bpf_bound_prog *state;
 310
 311         if (!bpf->prog)
 312                 return 0;
 313
 314         if (!bpf->prog->aux->offload) {
 315                 NSIM_EA(bpf->extack, "xdpoffload of non-bound program");
 316                 return -EINVAL;
 317         }
 318         if (!bpf_offload_dev_match(bpf->prog, ns->netdev)) {
 319                 NSIM_EA(bpf->extack, "program bound to different dev");
 320                 return -EINVAL;
 321         }
 322
 323         state = bpf->prog->aux->offload->dev_priv;
 324         if (WARN_ON(strcmp(state->state, "xlated"))) {
 325                 NSIM_EA(bpf->extack, "offloading program in bad state");
 326                 return -EINVAL;
 327         }
 328         return 0;
 329 }
 330
 331 static bool
 332 nsim_map_key_match(struct bpf_map *map, struct nsim_map_entry *e, void *key)
 333 {
 334         return e->key && !memcmp(key, e->key, map->key_size);
 335 }
 336
 337 static int nsim_map_key_find(struct bpf_offloaded_map *offmap, void *key)
 338 {
 339         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 340         unsigned int i;
 341
 342         for (i = 0; i < ARRAY_SIZE(nmap->entry); i++)
 343                 if (nsim_map_key_match(&offmap->map, &nmap->entry[i], key))
 344                         return i;
 345
 346         return -ENOENT;
 347 }
 348
 349 static int
 350 nsim_map_alloc_elem(struct bpf_offloaded_map *offmap, unsigned int idx)
 351 {
 352         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 353
 354         nmap->entry[idx].key = kmalloc(offmap->map.key_size, GFP_USER);
 355         if (!nmap->entry[idx].key)
 356                 return -ENOMEM;
 357         nmap->entry[idx].value = kmalloc(offmap->map.value_size, GFP_USER);
 358         if (!nmap->entry[idx].value) {
 359                 kfree(nmap->entry[idx].key);
 360                 nmap->entry[idx].key = NULL;
 361                 return -ENOMEM;
 362         }
 363
 364         return 0;
 365 }
 366
 367 static int
 368 nsim_map_get_next_key(struct bpf_offloaded_map *offmap,
 369                       void *key, void *next_key)
 370 {
 371         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 372         int idx = -ENOENT;
 373
 374         mutex_lock(&nmap->mutex);
 375
 376         if (key)
 377                 idx = nsim_map_key_find(offmap, key);
 378         if (idx == -ENOENT)
 379                 idx = 0;
 380         else
 381                 idx++;
 382
 383         for (; idx < ARRAY_SIZE(nmap->entry); idx++) {
 384                 if (nmap->entry[idx].key) {
 385                         memcpy(next_key, nmap->entry[idx].key,
 386                                offmap->map.key_size);
 387                         break;
 388                 }
 389         }
 390
 391         mutex_unlock(&nmap->mutex);
 392
 393         if (idx == ARRAY_SIZE(nmap->entry))
 394                 return -ENOENT;
 395         return 0;
 396 }
 397
 398 static int
 399 nsim_map_lookup_elem(struct bpf_offloaded_map *offmap, void *key, void *value)
 400 {
 401         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 402         int idx;
 403
 404         mutex_lock(&nmap->mutex);
 405
 406         idx = nsim_map_key_find(offmap, key);
 407         if (idx >= 0)
 408                 memcpy(value, nmap->entry[idx].value, offmap->map.value_size);
 409
 410         mutex_unlock(&nmap->mutex);
 411
 412         return idx < 0 ? idx : 0;
 413 }
 414
 415 static int
 416 nsim_map_update_elem(struct bpf_offloaded_map *offmap,
 417                      void *key, void *value, u64 flags)
 418 {
 419         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 420         int idx, err = 0;
 421
 422         mutex_lock(&nmap->mutex);
 423
 424         idx = nsim_map_key_find(offmap, key);
 425         if (idx < 0 && flags == BPF_EXIST) {
 426                 err = idx;
 427                 goto exit_unlock;
 428         }
 429         if (idx >= 0 && flags == BPF_NOEXIST) {
 430                 err = -EEXIST;
 431                 goto exit_unlock;
 432         }
 433
 434         if (idx < 0) {
 435                 for (idx = 0; idx < ARRAY_SIZE(nmap->entry); idx++)
 436                         if (!nmap->entry[idx].key)
 437                                 break;
 438                 if (idx == ARRAY_SIZE(nmap->entry)) {
 439                         err = -E2BIG;
 440                         goto exit_unlock;
 441                 }
 442
 443                 err = nsim_map_alloc_elem(offmap, idx);
 444                 if (err)
 445                         goto exit_unlock;
 446         }
 447
 448         memcpy(nmap->entry[idx].key, key, offmap->map.key_size);
 449         memcpy(nmap->entry[idx].value, value, offmap->map.value_size);
 450 exit_unlock:
 451         mutex_unlock(&nmap->mutex);
 452
 453         return err;
 454 }
 455
 456 static int nsim_map_delete_elem(struct bpf_offloaded_map *offmap, void *key)
 457 {
 458         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 459         int idx;
 460
 461         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY)
 462                 return -EINVAL;
 463
 464         mutex_lock(&nmap->mutex);
 465
 466         idx = nsim_map_key_find(offmap, key);
 467         if (idx >= 0) {
 468                 kfree(nmap->entry[idx].key);
 469                 kfree(nmap->entry[idx].value);
 470                 memset(&nmap->entry[idx], 0, sizeof(nmap->entry[idx]));
 471         }
 472
 473         mutex_unlock(&nmap->mutex);
 474
 475         return idx < 0 ? idx : 0;
 476 }
 477
 478 static const struct bpf_map_dev_ops nsim_bpf_map_ops = {
 479         .map_get_next_key       = nsim_map_get_next_key,
 480         .map_lookup_elem        = nsim_map_lookup_elem,
 481         .map_update_elem        = nsim_map_update_elem,
 482         .map_delete_elem        = nsim_map_delete_elem,
 483 };
 484
 485 static int
 486 nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_offloaded_map *offmap)
 487 {
 488         struct nsim_bpf_bound_map *nmap;
 489         int i, err;
 490
 491         if (WARN_ON(offmap->map.map_type != BPF_MAP_TYPE_ARRAY &&
 492                     offmap->map.map_type != BPF_MAP_TYPE_HASH))
 493                 return -EINVAL;
 494         if (offmap->map.max_entries > NSIM_BPF_MAX_KEYS)
 495                 return -ENOMEM;
 496         if (offmap->map.map_flags)
 497                 return -EINVAL;
 498
 499         nmap = kzalloc(sizeof(*nmap), GFP_USER);
 500         if (!nmap)
 501                 return -ENOMEM;
 502
 503         offmap->dev_priv = nmap;
 504         nmap->ns = ns;
 505         nmap->map = offmap;
 506         mutex_init(&nmap->mutex);
 507
 508         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY) {
 509                 for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 510                         u32 *key;
 511
 512                         err = nsim_map_alloc_elem(offmap, i);
 513                         if (err)
 514                                 goto err_free;
 515                         key = nmap->entry[i].key;
 516                         *key = i;
 517                 }
 518         }
 519
 520         offmap->dev_ops = &nsim_bpf_map_ops;
 521         list_add_tail(&nmap->l, &ns->nsim_dev->bpf_bound_maps);
 522
 523         return 0;
 524
 525 err_free:
 526         while (--i >= 0) {
 527                 kfree(nmap->entry[i].key);
 528                 kfree(nmap->entry[i].value);
 529         }
 530         kfree(nmap);
 531         return err;
 532 }
 533
 534 static void nsim_bpf_map_free(struct bpf_offloaded_map *offmap)
 535 {
 536         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 537         unsigned int i;
 538
 539         for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 540                 kfree(nmap->entry[i].key);
 541                 kfree(nmap->entry[i].value);
 542         }
 543         list_del_init(&nmap->l);
 544         mutex_destroy(&nmap->mutex);
 545         kfree(nmap);
 546 }
 547
 548 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
 549 {
 550         struct netdevsim *ns = netdev_priv(dev);
 551         int err;
 552
 553         ASSERT_RTNL();
 554
 555         switch (bpf->command) {
 556         case XDP_SETUP_PROG:
 557                 err = nsim_setup_prog_checks(ns, bpf);
 558                 if (err)
 559                         return err;
 560
 561                 return nsim_xdp_set_prog(ns, bpf, &ns->xdp);
 562         case XDP_SETUP_PROG_HW:
 563                 err = nsim_setup_prog_hw_checks(ns, bpf);
 564                 if (err)
 565                         return err;
 566
 567                 return nsim_xdp_set_prog(ns, bpf, &ns->xdp_hw);
 568         case BPF_OFFLOAD_MAP_ALLOC:
 569                 if (!ns->bpf_map_accept)
 570                         return -EOPNOTSUPP;
 571
 572                 return nsim_bpf_map_alloc(ns, bpf->offmap);
 573         case BPF_OFFLOAD_MAP_FREE:
 574                 nsim_bpf_map_free(bpf->offmap);
 575                 return 0;
 576         default:
 577                 return -EINVAL;
 578         }
 579 }
 580
 581 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
 582 {
 583         int err;
 584
 585         INIT_LIST_HEAD(&nsim_dev->bpf_bound_progs);
 586         INIT_LIST_HEAD(&nsim_dev->bpf_bound_maps);
 587
 588         nsim_dev->ddir_bpf_bound_progs = debugfs_create_dir("bpf_bound_progs",
 589                                                             nsim_dev->ddir);
 590         if (IS_ERR(nsim_dev->ddir_bpf_bound_progs))
 591                 return PTR_ERR(nsim_dev->ddir_bpf_bound_progs);
 592
 593         nsim_dev->bpf_dev = bpf_offload_dev_create(&nsim_bpf_dev_ops, nsim_dev);
 594         err = PTR_ERR_OR_ZERO(nsim_dev->bpf_dev);
 595         if (err)
 596                 return err;
 597
 598         nsim_dev->bpf_bind_accept = true;
 599         debugfs_create_bool("bpf_bind_accept", 0600, nsim_dev->ddir,
 600                             &nsim_dev->bpf_bind_accept);
 601         debugfs_create_u32("bpf_bind_verifier_delay", 0600, nsim_dev->ddir,
 602                            &nsim_dev->bpf_bind_verifier_delay);
 603         nsim_dev->bpf_bind_verifier_accept = true;
 604         debugfs_create_bool("bpf_bind_verifier_accept", 0600, nsim_dev->ddir,
 605                             &nsim_dev->bpf_bind_verifier_accept);
 606         return 0;
 607 }
 608
 609 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
 610 {
 611         WARN_ON(!list_empty(&nsim_dev->bpf_bound_progs));
 612         WARN_ON(!list_empty(&nsim_dev->bpf_bound_maps));
 613         bpf_offload_dev_destroy(nsim_dev->bpf_dev);
 614 }
 615
 616 int nsim_bpf_init(struct netdevsim *ns)
 617 {
 618         struct dentry *ddir = ns->nsim_dev_port->ddir;
 619         int err;
 620
 621         err = bpf_offload_dev_netdev_register(ns->nsim_dev->bpf_dev,
 622                                               ns->netdev);
 623         if (err)
 624                 return err;
 625
 626         debugfs_create_u32("bpf_offloaded_id", 0400, ddir,
 627                            &ns->bpf_offloaded_id);
 628
 629         ns->bpf_tc_accept = true;
 630         debugfs_create_bool("bpf_tc_accept", 0600, ddir,
 631                             &ns->bpf_tc_accept);
 632         debugfs_create_bool("bpf_tc_non_bound_accept", 0600, ddir,
 633                             &ns->bpf_tc_non_bound_accept);
 634         ns->bpf_xdpdrv_accept = true;
 635         debugfs_create_bool("bpf_xdpdrv_accept", 0600, ddir,
 636                             &ns->bpf_xdpdrv_accept);
 637         ns->bpf_xdpoffload_accept = true;
 638         debugfs_create_bool("bpf_xdpoffload_accept", 0600, ddir,
 639                             &ns->bpf_xdpoffload_accept);
 640
 641         ns->bpf_map_accept = true;
 642         debugfs_create_bool("bpf_map_accept", 0600, ddir,
 643                             &ns->bpf_map_accept);
 644
 645         return 0;
 646 }
 647
 648 void nsim_bpf_uninit(struct netdevsim *ns)
 649 {
 650         WARN_ON(ns->xdp.prog);
 651         WARN_ON(ns->xdp_hw.prog);
 652         WARN_ON(ns->bpf_offloaded);
 653         bpf_offload_dev_netdev_unregister(ns->nsim_dev->bpf_dev, ns->netdev);
 654 }