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
  67         state = env->prog->aux->offload->dev_priv;
  68         if (state->nsim_dev->bpf_bind_verifier_delay && !insn_idx)
  69                 msleep(state->nsim_dev->bpf_bind_verifier_delay);
  70
  71         if (insn_idx == env->prog->len - 1)
  72                 pr_vlog(env, "Hello from netdevsim!\n");
  73
  74         return 0;
  75 }
  76
  77 static int nsim_bpf_finalize(struct bpf_verifier_env *env)
  78 {
  79         return 0;
  80 }
  81
  82 static bool nsim_xdp_offload_active(struct netdevsim *ns)
  83 {
  84         return ns->xdp_hw.prog;
  85 }
  86
  87 static void nsim_prog_set_loaded(struct bpf_prog *prog, bool loaded)
  88 {
  89         struct nsim_bpf_bound_prog *state;
  90
  91         if (!prog || !prog->aux->offload)
  92                 return;
  93
  94         state = prog->aux->offload->dev_priv;
  95         state->is_loaded = loaded;
  96 }
  97
  98 static int
  99 nsim_bpf_offload(struct netdevsim *ns, struct bpf_prog *prog, bool oldprog)
 100 {
 101         nsim_prog_set_loaded(ns->bpf_offloaded, false);
 102
 103         WARN(!!ns->bpf_offloaded != oldprog,
 104              "bad offload state, expected offload %sto be active",
 105              oldprog ? "" : "not ");
 106         ns->bpf_offloaded = prog;
 107         ns->bpf_offloaded_id = prog ? prog->aux->id : 0;
 108         nsim_prog_set_loaded(prog, true);
 109
 110         return 0;
 111 }
 112
 113 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
 114                                void *type_data, void *cb_priv)
 115 {
 116         struct tc_cls_bpf_offload *cls_bpf = type_data;
 117         struct bpf_prog *prog = cls_bpf->prog;
 118         struct netdevsim *ns = cb_priv;
 119         struct bpf_prog *oldprog;
 120
 121         if (type != TC_SETUP_CLSBPF) {
 122                 NSIM_EA(cls_bpf->common.extack,
 123                         "only offload of BPF classifiers supported");
 124                 return -EOPNOTSUPP;
 125         }
 126
 127         if (!tc_cls_can_offload_and_chain0(ns->netdev, &cls_bpf->common))
 128                 return -EOPNOTSUPP;
 129
 130         if (cls_bpf->common.protocol != htons(ETH_P_ALL)) {
 131                 NSIM_EA(cls_bpf->common.extack,
 132                         "only ETH_P_ALL supported as filter protocol");
 133                 return -EOPNOTSUPP;
 134         }
 135
 136         if (!ns->bpf_tc_accept) {
 137                 NSIM_EA(cls_bpf->common.extack,
 138                         "netdevsim configured to reject BPF TC offload");
 139                 return -EOPNOTSUPP;
 140         }
 141         /* Note: progs without skip_sw will probably not be dev bound */
 142         if (prog && !prog->aux->offload && !ns->bpf_tc_non_bound_accept) {
 143                 NSIM_EA(cls_bpf->common.extack,
 144                         "netdevsim configured to reject unbound programs");
 145                 return -EOPNOTSUPP;
 146         }
 147
 148         if (cls_bpf->command != TC_CLSBPF_OFFLOAD)
 149                 return -EOPNOTSUPP;
 150
 151         oldprog = cls_bpf->oldprog;
 152
 153         /* Don't remove if oldprog doesn't match driver's state */
 154         if (ns->bpf_offloaded != oldprog) {
 155                 oldprog = NULL;
 156                 if (!cls_bpf->prog)
 157                         return 0;
 158                 if (ns->bpf_offloaded) {
 159                         NSIM_EA(cls_bpf->common.extack,
 160                                 "driver and netdev offload states mismatch");
 161                         return -EBUSY;
 162                 }
 163         }
 164
 165         return nsim_bpf_offload(ns, cls_bpf->prog, oldprog);
 166 }
 167
 168 int nsim_bpf_disable_tc(struct netdevsim *ns)
 169 {
 170         if (ns->bpf_offloaded && !nsim_xdp_offload_active(ns))
 171                 return -EBUSY;
 172         return 0;
 173 }
 174
 175 static int nsim_xdp_offload_prog(struct netdevsim *ns, struct netdev_bpf *bpf)
 176 {
 177         if (!nsim_xdp_offload_active(ns) && !bpf->prog)
 178                 return 0;
 179         if (!nsim_xdp_offload_active(ns) && bpf->prog && ns->bpf_offloaded) {
 180                 NSIM_EA(bpf->extack, "TC program is already loaded");
 181                 return -EBUSY;
 182         }
 183
 184         return nsim_bpf_offload(ns, bpf->prog, nsim_xdp_offload_active(ns));
 185 }
 186
 187 static int
 188 nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf,
 189                   struct xdp_attachment_info *xdp)
 190 {
 191         int err;
 192
 193         if (!xdp_attachment_flags_ok(xdp, bpf))
 194                 return -EBUSY;
 195
 196         if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) {
 197                 NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS");
 198                 return -EOPNOTSUPP;
 199         }
 200         if (bpf->command == XDP_SETUP_PROG_HW && !ns->bpf_xdpoffload_accept) {
 201                 NSIM_EA(bpf->extack, "XDP offload disabled in DebugFS");
 202                 return -EOPNOTSUPP;
 203         }
 204
 205         if (bpf->command == XDP_SETUP_PROG_HW) {
 206                 err = nsim_xdp_offload_prog(ns, bpf);
 207                 if (err)
 208                         return err;
 209         }
 210
 211         xdp_attachment_setup(xdp, bpf);
 212
 213         return 0;
 214 }
 215
 216 static int nsim_bpf_create_prog(struct nsim_dev *nsim_dev,
 217                                 struct bpf_prog *prog)
 218 {
 219         struct nsim_bpf_bound_prog *state;
 220         char name[16];
 221
 222         state = kzalloc(sizeof(*state), GFP_KERNEL);
 223         if (!state)
 224                 return -ENOMEM;
 225
 226         state->nsim_dev = nsim_dev;
 227         state->prog = prog;
 228         state->state = "verify";
 229
 230         /* Program id is not populated yet when we create the state. */
 231         sprintf(name, "%u", nsim_dev->prog_id_gen++);
 232         state->ddir = debugfs_create_dir(name, nsim_dev->ddir_bpf_bound_progs);
 233         if (IS_ERR_OR_NULL(state->ddir)) {
 234                 kfree(state);
 235                 return -ENOMEM;
 236         }
 237
 238         debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id);
 239         debugfs_create_file("state", 0400, state->ddir,
 240                             &state->state, &nsim_bpf_string_fops);
 241         debugfs_create_bool("loaded", 0400, state->ddir, &state->is_loaded);
 242
 243         list_add_tail(&state->l, &nsim_dev->bpf_bound_progs);
 244
 245         prog->aux->offload->dev_priv = state;
 246
 247         return 0;
 248 }
 249
 250 static int nsim_bpf_verifier_prep(struct bpf_prog *prog)
 251 {
 252         struct nsim_dev *nsim_dev =
 253                         bpf_offload_dev_priv(prog->aux->offload->offdev);
 254
 255         if (!nsim_dev->bpf_bind_accept)
 256                 return -EOPNOTSUPP;
 257
 258         return nsim_bpf_create_prog(nsim_dev, prog);
 259 }
 260
 261 static int nsim_bpf_translate(struct bpf_prog *prog)
 262 {
 263         struct nsim_bpf_bound_prog *state = prog->aux->offload->dev_priv;
 264
 265         state->state = "xlated";
 266         return 0;
 267 }
 268
 269 static void nsim_bpf_destroy_prog(struct bpf_prog *prog)
 270 {
 271         struct nsim_bpf_bound_prog *state;
 272
 273         state = prog->aux->offload->dev_priv;
 274         WARN(state->is_loaded,
 275              "offload state destroyed while program still bound");
 276         debugfs_remove_recursive(state->ddir);
 277         list_del(&state->l);
 278         kfree(state);
 279 }
 280
 281 static const struct bpf_prog_offload_ops nsim_bpf_dev_ops = {
 282         .insn_hook      = nsim_bpf_verify_insn,
 283         .finalize       = nsim_bpf_finalize,
 284         .prepare        = nsim_bpf_verifier_prep,
 285         .translate      = nsim_bpf_translate,
 286         .destroy        = nsim_bpf_destroy_prog,
 287 };
 288
 289 static int nsim_setup_prog_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
 290 {
 291         if (bpf->prog && bpf->prog->aux->offload) {
 292                 NSIM_EA(bpf->extack, "attempt to load offloaded prog to drv");
 293                 return -EINVAL;
 294         }
 295         if (ns->netdev->mtu > NSIM_XDP_MAX_MTU) {
 296                 NSIM_EA(bpf->extack, "MTU too large w/ XDP enabled");
 297                 return -EINVAL;
 298         }
 299         return 0;
 300 }
 301
 302 static int
 303 nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
 304 {
 305         struct nsim_bpf_bound_prog *state;
 306
 307         if (!bpf->prog)
 308                 return 0;
 309
 310         if (!bpf->prog->aux->offload) {
 311                 NSIM_EA(bpf->extack, "xdpoffload of non-bound program");
 312                 return -EINVAL;
 313         }
 314         if (!bpf_offload_dev_match(bpf->prog, ns->netdev)) {
 315                 NSIM_EA(bpf->extack, "program bound to different dev");
 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, GFP_USER);
 351         if (!nmap->entry[idx].key)
 352                 return -ENOMEM;
 353         nmap->entry[idx].value = kmalloc(offmap->map.value_size, GFP_USER);
 354         if (!nmap->entry[idx].value) {
 355                 kfree(nmap->entry[idx].key);
 356                 nmap->entry[idx].key = NULL;
 357                 return -ENOMEM;
 358         }
 359
 360         return 0;
 361 }
 362
 363 static int
 364 nsim_map_get_next_key(struct bpf_offloaded_map *offmap,
 365                       void *key, void *next_key)
 366 {
 367         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 368         int idx = -ENOENT;
 369
 370         mutex_lock(&nmap->mutex);
 371
 372         if (key)
 373                 idx = nsim_map_key_find(offmap, key);
 374         if (idx == -ENOENT)
 375                 idx = 0;
 376         else
 377                 idx++;
 378
 379         for (; idx < ARRAY_SIZE(nmap->entry); idx++) {
 380                 if (nmap->entry[idx].key) {
 381                         memcpy(next_key, nmap->entry[idx].key,
 382                                offmap->map.key_size);
 383                         break;
 384                 }
 385         }
 386
 387         mutex_unlock(&nmap->mutex);
 388
 389         if (idx == ARRAY_SIZE(nmap->entry))
 390                 return -ENOENT;
 391         return 0;
 392 }
 393
 394 static int
 395 nsim_map_lookup_elem(struct bpf_offloaded_map *offmap, void *key, void *value)
 396 {
 397         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 398         int idx;
 399
 400         mutex_lock(&nmap->mutex);
 401
 402         idx = nsim_map_key_find(offmap, key);
 403         if (idx >= 0)
 404                 memcpy(value, nmap->entry[idx].value, offmap->map.value_size);
 405
 406         mutex_unlock(&nmap->mutex);
 407
 408         return idx < 0 ? idx : 0;
 409 }
 410
 411 static int
 412 nsim_map_update_elem(struct bpf_offloaded_map *offmap,
 413                      void *key, void *value, u64 flags)
 414 {
 415         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 416         int idx, err = 0;
 417
 418         mutex_lock(&nmap->mutex);
 419
 420         idx = nsim_map_key_find(offmap, key);
 421         if (idx < 0 && flags == BPF_EXIST) {
 422                 err = idx;
 423                 goto exit_unlock;
 424         }
 425         if (idx >= 0 && flags == BPF_NOEXIST) {
 426                 err = -EEXIST;
 427                 goto exit_unlock;
 428         }
 429
 430         if (idx < 0) {
 431                 for (idx = 0; idx < ARRAY_SIZE(nmap->entry); idx++)
 432                         if (!nmap->entry[idx].key)
 433                                 break;
 434                 if (idx == ARRAY_SIZE(nmap->entry)) {
 435                         err = -E2BIG;
 436                         goto exit_unlock;
 437                 }
 438
 439                 err = nsim_map_alloc_elem(offmap, idx);
 440                 if (err)
 441                         goto exit_unlock;
 442         }
 443
 444         memcpy(nmap->entry[idx].key, key, offmap->map.key_size);
 445         memcpy(nmap->entry[idx].value, value, offmap->map.value_size);
 446 exit_unlock:
 447         mutex_unlock(&nmap->mutex);
 448
 449         return err;
 450 }
 451
 452 static int nsim_map_delete_elem(struct bpf_offloaded_map *offmap, void *key)
 453 {
 454         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 455         int idx;
 456
 457         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY)
 458                 return -EINVAL;
 459
 460         mutex_lock(&nmap->mutex);
 461
 462         idx = nsim_map_key_find(offmap, key);
 463         if (idx >= 0) {
 464                 kfree(nmap->entry[idx].key);
 465                 kfree(nmap->entry[idx].value);
 466                 memset(&nmap->entry[idx], 0, sizeof(nmap->entry[idx]));
 467         }
 468
 469         mutex_unlock(&nmap->mutex);
 470
 471         return idx < 0 ? idx : 0;
 472 }
 473
 474 static const struct bpf_map_dev_ops nsim_bpf_map_ops = {
 475         .map_get_next_key       = nsim_map_get_next_key,
 476         .map_lookup_elem        = nsim_map_lookup_elem,
 477         .map_update_elem        = nsim_map_update_elem,
 478         .map_delete_elem        = nsim_map_delete_elem,
 479 };
 480
 481 static int
 482 nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_offloaded_map *offmap)
 483 {
 484         struct nsim_bpf_bound_map *nmap;
 485         int i, err;
 486
 487         if (WARN_ON(offmap->map.map_type != BPF_MAP_TYPE_ARRAY &&
 488                     offmap->map.map_type != BPF_MAP_TYPE_HASH))
 489                 return -EINVAL;
 490         if (offmap->map.max_entries > NSIM_BPF_MAX_KEYS)
 491                 return -ENOMEM;
 492         if (offmap->map.map_flags)
 493                 return -EINVAL;
 494
 495         nmap = kzalloc(sizeof(*nmap), GFP_USER);
 496         if (!nmap)
 497                 return -ENOMEM;
 498
 499         offmap->dev_priv = nmap;
 500         nmap->ns = ns;
 501         nmap->map = offmap;
 502         mutex_init(&nmap->mutex);
 503
 504         if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY) {
 505                 for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 506                         u32 *key;
 507
 508                         err = nsim_map_alloc_elem(offmap, i);
 509                         if (err)
 510                                 goto err_free;
 511                         key = nmap->entry[i].key;
 512                         *key = i;
 513                 }
 514         }
 515
 516         offmap->dev_ops = &nsim_bpf_map_ops;
 517         list_add_tail(&nmap->l, &ns->nsim_dev->bpf_bound_maps);
 518
 519         return 0;
 520
 521 err_free:
 522         while (--i >= 0) {
 523                 kfree(nmap->entry[i].key);
 524                 kfree(nmap->entry[i].value);
 525         }
 526         kfree(nmap);
 527         return err;
 528 }
 529
 530 static void nsim_bpf_map_free(struct bpf_offloaded_map *offmap)
 531 {
 532         struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 533         unsigned int i;
 534
 535         for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
 536                 kfree(nmap->entry[i].key);
 537                 kfree(nmap->entry[i].value);
 538         }
 539         list_del_init(&nmap->l);
 540         mutex_destroy(&nmap->mutex);
 541         kfree(nmap);
 542 }
 543
 544 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
 545 {
 546         struct netdevsim *ns = netdev_priv(dev);
 547         int err;
 548
 549         ASSERT_RTNL();
 550
 551         switch (bpf->command) {
 552         case XDP_QUERY_PROG:
 553                 return xdp_attachment_query(&ns->xdp, bpf);
 554         case XDP_QUERY_PROG_HW:
 555                 return xdp_attachment_query(&ns->xdp_hw, bpf);
 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_OR_NULL(nsim_dev->ddir_bpf_bound_progs))
 591                 return -ENOMEM;
 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         return 0;
 604 }
 605
 606 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
 607 {
 608         WARN_ON(!list_empty(&nsim_dev->bpf_bound_progs));
 609         WARN_ON(!list_empty(&nsim_dev->bpf_bound_maps));
 610         bpf_offload_dev_destroy(nsim_dev->bpf_dev);
 611 }
 612
 613 int nsim_bpf_init(struct netdevsim *ns)
 614 {
 615         struct dentry *ddir = ns->nsim_dev_port->ddir;
 616         int err;
 617
 618         err = bpf_offload_dev_netdev_register(ns->nsim_dev->bpf_dev,
 619                                               ns->netdev);
 620         if (err)
 621                 return err;
 622
 623         debugfs_create_u32("bpf_offloaded_id", 0400, ddir,
 624                            &ns->bpf_offloaded_id);
 625
 626         ns->bpf_tc_accept = true;
 627         debugfs_create_bool("bpf_tc_accept", 0600, ddir,
 628                             &ns->bpf_tc_accept);
 629         debugfs_create_bool("bpf_tc_non_bound_accept", 0600, ddir,
 630                             &ns->bpf_tc_non_bound_accept);
 631         ns->bpf_xdpdrv_accept = true;
 632         debugfs_create_bool("bpf_xdpdrv_accept", 0600, ddir,
 633                             &ns->bpf_xdpdrv_accept);
 634         ns->bpf_xdpoffload_accept = true;
 635         debugfs_create_bool("bpf_xdpoffload_accept", 0600, ddir,
 636                             &ns->bpf_xdpoffload_accept);
 637
 638         ns->bpf_map_accept = true;
 639         debugfs_create_bool("bpf_map_accept", 0600, ddir,
 640                             &ns->bpf_map_accept);
 641
 642         return 0;
 643 }
 644
 645 void nsim_bpf_uninit(struct netdevsim *ns)
 646 {
 647         WARN_ON(ns->xdp.prog);
 648         WARN_ON(ns->xdp_hw.prog);
 649         WARN_ON(ns->bpf_offloaded);
 650         bpf_offload_dev_netdev_unregister(ns->nsim_dev->bpf_dev, ns->netdev);
 651 }