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
 319         state = bpf->prog->aux->offload->dev_priv;
 320         if (WARN_ON(strcmp(state->state, "xlated"))) {
 321                 NSIM_EA(bpf->extack, "offloading program in bad state");
 322                 return -EINVAL;
 323         }
 324         return 0;
 325 }
 326
 327 static bool
 328 nsim_map_key_match(struct bpf_map *map, struct nsim_map_entry *e, void *key)
 329 {
 330         return e->key && !memcmp(key, e->key, map->key_size);
 331 }
 332
 333 static int nsim_map_key_find(struct bpf_offloaded_map *offmap, void *key)
 334 {
 335         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 336         unsigned int i;
 337
 338         for (i = 0; i < ARRAY_SIZE(nmap->entry); i++)
 339                 if (nsim_map_key_match(&offmap->map, &nmap->entry[i], key))
 340                         return i;
 341
 342         return -ENOENT;
 343 }
 344
 345 static int
 346 nsim_map_alloc_elem(struct bpf_offloaded_map *offmap, unsigned int idx)
 347 {
 348         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 349
 350         nmap->entry[idx].key = kmalloc(offmap->map.key_size,
 351                                        GFP_KERNEL_ACCOUNT | __GFP_NOWARN);
 352         if (!nmap->entry[idx].key)
 353                 return -ENOMEM;
 354         nmap->entry[idx].value = kmalloc(offmap->map.value_size,
 355                                          GFP_KERNEL_ACCOUNT | __GFP_NOWARN);
 356         if (!nmap->entry[idx].value) {
 357                 kfree(nmap->entry[idx].key);
 358                 nmap->entry[idx].key = NULL;
 359                 return -ENOMEM;
 360         }
 361
 362         return 0;
 363 }
 364
 365 static int
 366 nsim_map_get_next_key(struct bpf_offloaded_map *offmap,
 367                       void *key, void *next_key)
 368 {
 369         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 370         int idx = -ENOENT;
 371
 372         mutex_lock(&nmap->mutex);
 373
 374         if (key)
 375                 idx = nsim_map_key_find(offmap, key);
 376         if (idx == -ENOENT)
 377                 idx = 0;
 378         else
 379                 idx++;
 380
 381         for (; idx < ARRAY_SIZE(nmap->entry); idx++) {
 382                 if (nmap->entry[idx].key) {
 383                         memcpy(next_key, nmap->entry[idx].key,
 384                                offmap->map.key_size);
 385                         break;
 386                 }
 387         }
 388
 389         mutex_unlock(&nmap->mutex);
 390
 391         if (idx == ARRAY_SIZE(nmap->entry))
 392                 return -ENOENT;
 393         return 0;
 394 }
 395
 396 static int
 397 nsim_map_lookup_elem(struct bpf_offloaded_map *offmap, void *key, void *value)
 398 {
 399         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 400         int idx;
 401
 402         mutex_lock(&nmap->mutex);
 403
 404         idx = nsim_map_key_find(offmap, key);
 405         if (idx >= 0)
 406                 memcpy(value, nmap->entry[idx].value, offmap->map.value_size);
 407
 408         mutex_unlock(&nmap->mutex);
 409
 410         return idx < 0 ? idx : 0;
 411 }
 412
 413 static int
 414 nsim_map_update_elem(struct bpf_offloaded_map *offmap,
 415                      void *key, void *value, u64 flags)
 416 {
 417         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 418         int idx, err = 0;
 419
 420         mutex_lock(&nmap->mutex);
 421
 422         idx = nsim_map_key_find(offmap, key);
 423         if (idx < 0 && flags == BPF_EXIST) {
 424                 err = idx;
 425                 goto exit_unlock;
 426         }
 427         if (idx >= 0 && flags == BPF_NOEXIST) {
 428                 err = -EEXIST;
 429                 goto exit_unlock;
 430         }
 431
 432         if (idx < 0) {
 433                 for (idx = 0; idx < ARRAY_SIZE(nmap->entry); idx++)
 434                         if (!nmap->entry[idx].key)
 435                                 break;
 436                 if (idx == ARRAY_SIZE(nmap->entry)) {
 437                         err = -E2BIG;
 438                         goto exit_unlock;
 439                 }
 440
 441                 err = nsim_map_alloc_elem(offmap, idx);
 442                 if (err)
 443                         goto exit_unlock;
 444         }
 445
 446         memcpy(nmap->entry[idx].key, key, offmap->map.key_size);
 447         memcpy(nmap->entry[idx].value, value, offmap->map.value_size);
 448 exit_unlock:
 449         mutex_unlock(&nmap->mutex);
 450
 451         return err;
 452 }
 453
 454 static int nsim_map_delete_elem(struct bpf_offloaded_map *offmap, void *key)
 455 {
 456         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 457         int idx;
 458
 459         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY)
 460                 return -EINVAL;
 461
 462         mutex_lock(&nmap->mutex);
 463
 464         idx = nsim_map_key_find(offmap, key);
 465         if (idx >= 0) {
 466                 kfree(nmap->entry[idx].key);
 467                 kfree(nmap->entry[idx].value);
 468                 memset(&nmap->entry[idx], 0, sizeof(nmap->entry[idx]));
 469         }
 470
 471         mutex_unlock(&nmap->mutex);
 472
 473         return idx < 0 ? idx : 0;
 474 }
 475
 476 static const struct bpf_map_dev_ops nsim_bpf_map_ops = {
 477         .map_get_next_key       = nsim_map_get_next_key,
 478         .map_lookup_elem        = nsim_map_lookup_elem,
 479         .map_update_elem        = nsim_map_update_elem,
 480         .map_delete_elem        = nsim_map_delete_elem,
 481 };
 482
 483 static int
 484 nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_offloaded_map *offmap)
 485 {
 486         struct nsim_bpf_bound_map *nmap;
 487         int i, err;
 488
 489         if (WARN_ON(offmap->map.map_type != BPF_MAP_TYPE_ARRAY &&
 490                     offmap->map.map_type != BPF_MAP_TYPE_HASH))
 491                 return -EINVAL;
 492         if (offmap->map.max_entries > NSIM_BPF_MAX_KEYS)
 493                 return -ENOMEM;
 494         if (offmap->map.map_flags)
 495                 return -EINVAL;
 496
 497         nmap = kzalloc(sizeof(*nmap), GFP_KERNEL_ACCOUNT);
 498         if (!nmap)
 499                 return -ENOMEM;
 500
 501         offmap->dev_priv = nmap;
 502         nmap->ns = ns;
 503         nmap->map = offmap;
 504         mutex_init(&nmap->mutex);
 505
 506         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY) {
 507                 for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 508                         u32 *key;
 509
 510                         err = nsim_map_alloc_elem(offmap, i);
 511                         if (err)
 512                                 goto err_free;
 513                         key = nmap->entry[i].key;
 514                         *key = i;
 515                         memset(nmap->entry[i].value, 0, offmap->map.value_size);
 516                 }
 517         }
 518
 519         offmap->dev_ops = &nsim_bpf_map_ops;
 520         list_add_tail(&nmap->l, &ns->nsim_dev->bpf_bound_maps);
 521
 522         return 0;
 523
 524 err_free:
 525         while (--i >= 0) {
 526                 kfree(nmap->entry[i].key);
 527                 kfree(nmap->entry[i].value);
 528         }
 529         kfree(nmap);
 530         return err;
 531 }
 532
 533 static void nsim_bpf_map_free(struct bpf_offloaded_map *offmap)
 534 {
 535         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 536         unsigned int i;
 537
 538         for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 539                 kfree(nmap->entry[i].key);
 540                 kfree(nmap->entry[i].value);
 541         }
 542         list_del_init(&nmap->l);
 543         mutex_destroy(&nmap->mutex);
 544         kfree(nmap);
 545 }
 546
 547 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
 548 {
 549         struct netdevsim *ns = netdev_priv(dev);
 550         int err;
 551
 552         ASSERT_RTNL();
 553
 554         switch (bpf->command) {
 555         case XDP_SETUP_PROG:
 556                 err = nsim_setup_prog_checks(ns, bpf);
 557                 if (err)
 558                         return err;
 559
 560                 return nsim_xdp_set_prog(ns, bpf, &ns->xdp);
 561         case XDP_SETUP_PROG_HW:
 562                 err = nsim_setup_prog_hw_checks(ns, bpf);
 563                 if (err)
 564                         return err;
 565
 566                 return nsim_xdp_set_prog(ns, bpf, &ns->xdp_hw);
 567         case BPF_OFFLOAD_MAP_ALLOC:
 568                 if (!ns->bpf_map_accept)
 569                         return -EOPNOTSUPP;
 570
 571                 return nsim_bpf_map_alloc(ns, bpf->offmap);
 572         case BPF_OFFLOAD_MAP_FREE:
 573                 nsim_bpf_map_free(bpf->offmap);
 574                 return 0;
 575         default:
 576                 return -EINVAL;
 577         }
 578 }
 579
 580 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
 581 {
 582         int err;
 583
 584         INIT_LIST_HEAD(&nsim_dev->bpf_bound_progs);
 585         INIT_LIST_HEAD(&nsim_dev->bpf_bound_maps);
 586
 587         nsim_dev->ddir_bpf_bound_progs = debugfs_create_dir("bpf_bound_progs",
 588                                                             nsim_dev->ddir);
 589         if (IS_ERR(nsim_dev->ddir_bpf_bound_progs))
 590                 return PTR_ERR(nsim_dev->ddir_bpf_bound_progs);
 591
 592         nsim_dev->bpf_dev = bpf_offload_dev_create(&nsim_bpf_dev_ops, nsim_dev);
 593         err = PTR_ERR_OR_ZERO(nsim_dev->bpf_dev);
 594         if (err)
 595                 return err;
 596
 597         nsim_dev->bpf_bind_accept = true;
 598         debugfs_create_bool("bpf_bind_accept", 0600, nsim_dev->ddir,
 599                             &nsim_dev->bpf_bind_accept);
 600         debugfs_create_u32("bpf_bind_verifier_delay", 0600, nsim_dev->ddir,
 601                            &nsim_dev->bpf_bind_verifier_delay);
 602         nsim_dev->bpf_bind_verifier_accept = true;
 603         debugfs_create_bool("bpf_bind_verifier_accept", 0600, nsim_dev->ddir,
 604                             &nsim_dev->bpf_bind_verifier_accept);
 605         return 0;
 606 }
 607
 608 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
 609 {
 610         WARN_ON(!list_empty(&nsim_dev->bpf_bound_progs));
 611         WARN_ON(!list_empty(&nsim_dev->bpf_bound_maps));
 612         bpf_offload_dev_destroy(nsim_dev->bpf_dev);
 613 }
 614
 615 int nsim_bpf_init(struct netdevsim *ns)
 616 {
 617         struct dentry *ddir = ns->nsim_dev_port->ddir;
 618         int err;
 619
 620         err = bpf_offload_dev_netdev_register(ns->nsim_dev->bpf_dev,
 621                                               ns->netdev);
 622         if (err)
 623                 return err;
 624
 625         debugfs_create_u32("bpf_offloaded_id", 0400, ddir,
 626                            &ns->bpf_offloaded_id);
 627
 628         ns->bpf_tc_accept = true;
 629         debugfs_create_bool("bpf_tc_accept", 0600, ddir,
 630                             &ns->bpf_tc_accept);
 631         debugfs_create_bool("bpf_tc_non_bound_accept", 0600, ddir,
 632                             &ns->bpf_tc_non_bound_accept);
 633         ns->bpf_xdpdrv_accept = true;
 634         debugfs_create_bool("bpf_xdpdrv_accept", 0600, ddir,
 635                             &ns->bpf_xdpdrv_accept);
 636         ns->bpf_xdpoffload_accept = true;
 637         debugfs_create_bool("bpf_xdpoffload_accept", 0600, ddir,
 638                             &ns->bpf_xdpoffload_accept);
 639
 640         ns->bpf_map_accept = true;
 641         debugfs_create_bool("bpf_map_accept", 0600, ddir,
 642                             &ns->bpf_map_accept);
 643
 644         return 0;
 645 }
 646
 647 void nsim_bpf_uninit(struct netdevsim *ns)
 648 {
 649         WARN_ON(ns->xdp.prog);
 650         WARN_ON(ns->xdp_hw.prog);
 651         WARN_ON(ns->bpf_offloaded);
 652         bpf_offload_dev_netdev_unregister(ns->nsim_dev->bpf_dev, ns->netdev);
 653 }