Orange Pi5 kernel

/*
 * Copyright (C) 2017 Netronome Systems, Inc.
 *
 * This software is licensed under the GNU General License Version 2,
 * June 1991 as shown in the file COPYING in the top-level directory of this
 * source tree.
 *
 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
 */
 
#include <linux/bpf.h>
#include <linux/bpf_verifier.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/rtnetlink.h>
#include <net/pkt_cls.h>
 
#include "netdevsim.h"
 
#define pr_vlog(env, fmt, ...)	\
<------>bpf_verifier_log_write(env, "[netdevsim] " fmt, ##__VA_ARGS__)
 
struct nsim_bpf_bound_prog {
<------>struct nsim_dev *nsim_dev;
<------>struct bpf_prog *prog;
<------>struct dentry *ddir;
<------>const char *state;
<------>bool is_loaded;
<------>struct list_head l;
};
 
#define NSIM_BPF_MAX_KEYS		2
 
struct nsim_bpf_bound_map {
<------>struct netdevsim *ns;
<------>struct bpf_offloaded_map *map;
<------>struct mutex mutex;
<------>struct nsim_map_entry {
<------><------>void *key;
<------><------>void *value;
<------>} entry[NSIM_BPF_MAX_KEYS];
<------>struct list_head l;
};
 
static int nsim_bpf_string_show(struct seq_file *file, void *data)
{
<------>const char **str = file->private;
 
<------>if (*str)
<------><------>seq_printf(file, "%s\n", *str);
 
<------>return 0;
}
DEFINE_SHOW_ATTRIBUTE(nsim_bpf_string);
 
static int
nsim_bpf_verify_insn(struct bpf_verifier_env *env, int insn_idx, int prev_insn)
{
<------>struct nsim_bpf_bound_prog *state;
<------>int ret = 0;
 
<------>state = env->prog->aux->offload->dev_priv;
<------>if (state->nsim_dev->bpf_bind_verifier_delay && !insn_idx)
<------><------>msleep(state->nsim_dev->bpf_bind_verifier_delay);
 
<------>if (insn_idx == env->prog->len - 1) {
<------><------>pr_vlog(env, "Hello from netdevsim!\n");
 
<------><------>if (!state->nsim_dev->bpf_bind_verifier_accept)
<------><------><------>ret = -EOPNOTSUPP;
<------>}
 
<------>return ret;
}
 
static int nsim_bpf_finalize(struct bpf_verifier_env *env)
{
<------>return 0;
}
 
static bool nsim_xdp_offload_active(struct netdevsim *ns)
{
<------>return ns->xdp_hw.prog;
}
 
static void nsim_prog_set_loaded(struct bpf_prog *prog, bool loaded)
{
<------>struct nsim_bpf_bound_prog *state;
 
<------>if (!prog || !prog->aux->offload)
<------><------>return;
 
<------>state = prog->aux->offload->dev_priv;
<------>state->is_loaded = loaded;
}
 
static int
nsim_bpf_offload(struct netdevsim *ns, struct bpf_prog *prog, bool oldprog)
{
<------>nsim_prog_set_loaded(ns->bpf_offloaded, false);
 
<------>WARN(!!ns->bpf_offloaded != oldprog,
<------>     "bad offload state, expected offload %sto be active",
<------>     oldprog ? "" : "not ");
<------>ns->bpf_offloaded = prog;
<------>ns->bpf_offloaded_id = prog ? prog->aux->id : 0;
<------>nsim_prog_set_loaded(prog, true);
 
<------>return 0;
}
 
int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
<------><------><------>       void *type_data, void *cb_priv)
{
<------>struct tc_cls_bpf_offload *cls_bpf = type_data;
<------>struct bpf_prog *prog = cls_bpf->prog;
<------>struct netdevsim *ns = cb_priv;
<------>struct bpf_prog *oldprog;
 
<------>if (type != TC_SETUP_CLSBPF) {
<------><------>NSIM_EA(cls_bpf->common.extack,
<------><------><------>"only offload of BPF classifiers supported");
<------><------>return -EOPNOTSUPP;
<------>}
 
<------>if (!tc_cls_can_offload_and_chain0(ns->netdev, &cls_bpf->common))
<------><------>return -EOPNOTSUPP;
 
<------>if (cls_bpf->common.protocol != htons(ETH_P_ALL)) {
<------><------>NSIM_EA(cls_bpf->common.extack,
<------><------><------>"only ETH_P_ALL supported as filter protocol");
<------><------>return -EOPNOTSUPP;
<------>}
 
<------>if (!ns->bpf_tc_accept) {
<------><------>NSIM_EA(cls_bpf->common.extack,
<------><------><------>"netdevsim configured to reject BPF TC offload");
<------><------>return -EOPNOTSUPP;
<------>}
<------>/* Note: progs without skip_sw will probably not be dev bound */
<------>if (prog && !prog->aux->offload && !ns->bpf_tc_non_bound_accept) {
<------><------>NSIM_EA(cls_bpf->common.extack,
<------><------><------>"netdevsim configured to reject unbound programs");
<------><------>return -EOPNOTSUPP;
<------>}
 
<------>if (cls_bpf->command != TC_CLSBPF_OFFLOAD)
<------><------>return -EOPNOTSUPP;
 
<------>oldprog = cls_bpf->oldprog;
 
<------>/* Don't remove if oldprog doesn't match driver's state */
<------>if (ns->bpf_offloaded != oldprog) {
<------><------>oldprog = NULL;
<------><------>if (!cls_bpf->prog)
<------><------><------>return 0;
<------><------>if (ns->bpf_offloaded) {
<------><------><------>NSIM_EA(cls_bpf->common.extack,
<------><------><------><------>"driver and netdev offload states mismatch");
<------><------><------>return -EBUSY;
<------><------>}
<------>}
 
<------>return nsim_bpf_offload(ns, cls_bpf->prog, oldprog);
}
 
int nsim_bpf_disable_tc(struct netdevsim *ns)
{
<------>if (ns->bpf_offloaded && !nsim_xdp_offload_active(ns))
<------><------>return -EBUSY;
<------>return 0;
}
 
static int nsim_xdp_offload_prog(struct netdevsim *ns, struct netdev_bpf *bpf)
{
<------>if (!nsim_xdp_offload_active(ns) && !bpf->prog)
<------><------>return 0;
<------>if (!nsim_xdp_offload_active(ns) && bpf->prog && ns->bpf_offloaded) {
<------><------>NSIM_EA(bpf->extack, "TC program is already loaded");
<------><------>return -EBUSY;
<------>}
 
<------>return nsim_bpf_offload(ns, bpf->prog, nsim_xdp_offload_active(ns));
}
 
static int
nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf,
<------><------>  struct xdp_attachment_info *xdp)
{
<------>int err;
 
<------>if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) {
<------><------>NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS");
<------><------>return -EOPNOTSUPP;
<------>}
<------>if (bpf->command == XDP_SETUP_PROG_HW && !ns->bpf_xdpoffload_accept) {
<------><------>NSIM_EA(bpf->extack, "XDP offload disabled in DebugFS");
<------><------>return -EOPNOTSUPP;
<------>}
 
<------>if (bpf->command == XDP_SETUP_PROG_HW) {
<------><------>err = nsim_xdp_offload_prog(ns, bpf);
<------><------>if (err)
<------><------><------>return err;
<------>}
 
<------>xdp_attachment_setup(xdp, bpf);
 
<------>return 0;
}
 
static int nsim_bpf_create_prog(struct nsim_dev *nsim_dev,
<------><------><------><------>struct bpf_prog *prog)
{
<------>struct nsim_bpf_bound_prog *state;
<------>char name[16];
<------>int ret;
 
<------>state = kzalloc(sizeof(*state), GFP_KERNEL);
<------>if (!state)
<------><------>return -ENOMEM;
 
<------>state->nsim_dev = nsim_dev;
<------>state->prog = prog;
<------>state->state = "verify";
 
<------>/* Program id is not populated yet when we create the state. */
<------>sprintf(name, "%u", nsim_dev->prog_id_gen++);
<------>state->ddir = debugfs_create_dir(name, nsim_dev->ddir_bpf_bound_progs);
<------>if (IS_ERR(state->ddir)) {
<------><------>ret = PTR_ERR(state->ddir);
<------><------>kfree(state);
<------><------>return ret;
<------>}
 
<------>debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id);
<------>debugfs_create_file("state", 0400, state->ddir,
<------><------><------>    &state->state, &nsim_bpf_string_fops);
<------>debugfs_create_bool("loaded", 0400, state->ddir, &state->is_loaded);
 
<------>list_add_tail(&state->l, &nsim_dev->bpf_bound_progs);
 
<------>prog->aux->offload->dev_priv = state;
 
<------>return 0;
}
 
static int nsim_bpf_verifier_prep(struct bpf_prog *prog)
{
<------>struct nsim_dev *nsim_dev =
<------><------><------>bpf_offload_dev_priv(prog->aux->offload->offdev);
 
<------>if (!nsim_dev->bpf_bind_accept)
<------><------>return -EOPNOTSUPP;
 
<------>return nsim_bpf_create_prog(nsim_dev, prog);
}
 
static int nsim_bpf_translate(struct bpf_prog *prog)
{
<------>struct nsim_bpf_bound_prog *state = prog->aux->offload->dev_priv;
 
<------>state->state = "xlated";
<------>return 0;
}
 
static void nsim_bpf_destroy_prog(struct bpf_prog *prog)
{
<------>struct nsim_bpf_bound_prog *state;
 
<------>state = prog->aux->offload->dev_priv;
<------>WARN(state->is_loaded,
<------>     "offload state destroyed while program still bound");
<------>debugfs_remove_recursive(state->ddir);
<------>list_del(&state->l);
<------>kfree(state);
}
 
static const struct bpf_prog_offload_ops nsim_bpf_dev_ops = {
<------>.insn_hook	= nsim_bpf_verify_insn,
<------>.finalize	= nsim_bpf_finalize,
<------>.prepare	= nsim_bpf_verifier_prep,
<------>.translate	= nsim_bpf_translate,
<------>.destroy	= nsim_bpf_destroy_prog,
};
 
static int nsim_setup_prog_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
{
<------>if (bpf->prog && bpf->prog->aux->offload) {
<------><------>NSIM_EA(bpf->extack, "attempt to load offloaded prog to drv");
<------><------>return -EINVAL;
<------>}
<------>if (ns->netdev->mtu > NSIM_XDP_MAX_MTU) {
<------><------>NSIM_EA(bpf->extack, "MTU too large w/ XDP enabled");
<------><------>return -EINVAL;
<------>}
<------>return 0;
}
 
static int
nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf)
{
<------>struct nsim_bpf_bound_prog *state;
 
<------>if (!bpf->prog)
<------><------>return 0;
 
<------>if (!bpf->prog->aux->offload) {
<------><------>NSIM_EA(bpf->extack, "xdpoffload of non-bound program");
<------><------>return -EINVAL;
<------>}
<------>if (!bpf_offload_dev_match(bpf->prog, ns->netdev)) {
<------><------>NSIM_EA(bpf->extack, "program bound to different dev");
<------><------>return -EINVAL;
<------>}
 
<------>state = bpf->prog->aux->offload->dev_priv;
<------>if (WARN_ON(strcmp(state->state, "xlated"))) {
<------><------>NSIM_EA(bpf->extack, "offloading program in bad state");
<------><------>return -EINVAL;
<------>}
<------>return 0;
}
 
static bool
nsim_map_key_match(struct bpf_map *map, struct nsim_map_entry *e, void *key)
{
<------>return e->key && !memcmp(key, e->key, map->key_size);
}
 
static int nsim_map_key_find(struct bpf_offloaded_map *offmap, void *key)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>unsigned int i;
 
<------>for (i = 0; i < ARRAY_SIZE(nmap->entry); i++)
<------><------>if (nsim_map_key_match(&offmap->map, &nmap->entry[i], key))
<------><------><------>return i;
 
<------>return -ENOENT;
}
 
static int
nsim_map_alloc_elem(struct bpf_offloaded_map *offmap, unsigned int idx)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
 
<------>nmap->entry[idx].key = kmalloc(offmap->map.key_size, GFP_USER);
<------>if (!nmap->entry[idx].key)
<------><------>return -ENOMEM;
<------>nmap->entry[idx].value = kmalloc(offmap->map.value_size, GFP_USER);
<------>if (!nmap->entry[idx].value) {
<------><------>kfree(nmap->entry[idx].key);
<------><------>nmap->entry[idx].key = NULL;
<------><------>return -ENOMEM;
<------>}
 
<------>return 0;
}
 
static int
nsim_map_get_next_key(struct bpf_offloaded_map *offmap,
<------><------>      void *key, void *next_key)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>int idx = -ENOENT;
 
<------>mutex_lock(&nmap->mutex);
 
<------>if (key)
<------><------>idx = nsim_map_key_find(offmap, key);
<------>if (idx == -ENOENT)
<------><------>idx = 0;
<------>else
<------><------>idx++;
 
<------>for (; idx < ARRAY_SIZE(nmap->entry); idx++) {
<------><------>if (nmap->entry[idx].key) {
<------><------><------>memcpy(next_key, nmap->entry[idx].key,
<------><------><------>       offmap->map.key_size);
<------><------><------>break;
<------><------>}
<------>}
 
<------>mutex_unlock(&nmap->mutex);
 
<------>if (idx == ARRAY_SIZE(nmap->entry))
<------><------>return -ENOENT;
<------>return 0;
}
 
static int
nsim_map_lookup_elem(struct bpf_offloaded_map *offmap, void *key, void *value)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>int idx;
 
<------>mutex_lock(&nmap->mutex);
 
<------>idx = nsim_map_key_find(offmap, key);
<------>if (idx >= 0)
<------><------>memcpy(value, nmap->entry[idx].value, offmap->map.value_size);
 
<------>mutex_unlock(&nmap->mutex);
 
<------>return idx < 0 ? idx : 0;
}
 
static int
nsim_map_update_elem(struct bpf_offloaded_map *offmap,
<------><------>     void *key, void *value, u64 flags)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>int idx, err = 0;
 
<------>mutex_lock(&nmap->mutex);
 
<------>idx = nsim_map_key_find(offmap, key);
<------>if (idx < 0 && flags == BPF_EXIST) {
<------><------>err = idx;
<------><------>goto exit_unlock;
<------>}
<------>if (idx >= 0 && flags == BPF_NOEXIST) {
<------><------>err = -EEXIST;
<------><------>goto exit_unlock;
<------>}
 
<------>if (idx < 0) {
<------><------>for (idx = 0; idx < ARRAY_SIZE(nmap->entry); idx++)
<------><------><------>if (!nmap->entry[idx].key)
<------><------><------><------>break;
<------><------>if (idx == ARRAY_SIZE(nmap->entry)) {
<------><------><------>err = -E2BIG;
<------><------><------>goto exit_unlock;
<------><------>}
 
<------><------>err = nsim_map_alloc_elem(offmap, idx);
<------><------>if (err)
<------><------><------>goto exit_unlock;
<------>}
 
<------>memcpy(nmap->entry[idx].key, key, offmap->map.key_size);
<------>memcpy(nmap->entry[idx].value, value, offmap->map.value_size);
exit_unlock:
<------>mutex_unlock(&nmap->mutex);
 
<------>return err;
}
 
static int nsim_map_delete_elem(struct bpf_offloaded_map *offmap, void *key)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>int idx;
 
<------>if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY)
<------><------>return -EINVAL;
 
<------>mutex_lock(&nmap->mutex);
 
<------>idx = nsim_map_key_find(offmap, key);
<------>if (idx >= 0) {
<------><------>kfree(nmap->entry[idx].key);
<------><------>kfree(nmap->entry[idx].value);
<------><------>memset(&nmap->entry[idx], 0, sizeof(nmap->entry[idx]));
<------>}
 
<------>mutex_unlock(&nmap->mutex);
 
<------>return idx < 0 ? idx : 0;
}
 
static const struct bpf_map_dev_ops nsim_bpf_map_ops = {
<------>.map_get_next_key	= nsim_map_get_next_key,
<------>.map_lookup_elem	= nsim_map_lookup_elem,
<------>.map_update_elem	= nsim_map_update_elem,
<------>.map_delete_elem	= nsim_map_delete_elem,
};
 
static int
nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_offloaded_map *offmap)
{
<------>struct nsim_bpf_bound_map *nmap;
<------>int i, err;
 
<------>if (WARN_ON(offmap->map.map_type != BPF_MAP_TYPE_ARRAY &&
<------><------>    offmap->map.map_type != BPF_MAP_TYPE_HASH))
<------><------>return -EINVAL;
<------>if (offmap->map.max_entries > NSIM_BPF_MAX_KEYS)
<------><------>return -ENOMEM;
<------>if (offmap->map.map_flags)
<------><------>return -EINVAL;
 
<------>nmap = kzalloc(sizeof(*nmap), GFP_USER);
<------>if (!nmap)
<------><------>return -ENOMEM;
 
<------>offmap->dev_priv = nmap;
<------>nmap->ns = ns;
<------>nmap->map = offmap;
<------>mutex_init(&nmap->mutex);
 
<------>if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY) {
<------><------>for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
<------><------><------>u32 *key;
 
<------><------><------>err = nsim_map_alloc_elem(offmap, i);
<------><------><------>if (err)
<------><------><------><------>goto err_free;
<------><------><------>key = nmap->entry[i].key;
<------><------><------>*key = i;
<------><------><------>memset(nmap->entry[i].value, 0, offmap->map.value_size);
<------><------>}
<------>}
 
<------>offmap->dev_ops = &nsim_bpf_map_ops;
<------>list_add_tail(&nmap->l, &ns->nsim_dev->bpf_bound_maps);
 
<------>return 0;
 
err_free:
<------>while (--i >= 0) {
<------><------>kfree(nmap->entry[i].key);
<------><------>kfree(nmap->entry[i].value);
<------>}
<------>kfree(nmap);
<------>return err;
}
 
static void nsim_bpf_map_free(struct bpf_offloaded_map *offmap)
{
<------>struct nsim_bpf_bound_map *nmap = offmap->dev_priv;
<------>unsigned int i;
 
<------>for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {
<------><------>kfree(nmap->entry[i].key);
<------><------>kfree(nmap->entry[i].value);
<------>}
<------>list_del_init(&nmap->l);
<------>mutex_destroy(&nmap->mutex);
<------>kfree(nmap);
}
 
int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
{
<------>struct netdevsim *ns = netdev_priv(dev);
<------>int err;
 
<------>ASSERT_RTNL();
 
<------>switch (bpf->command) {
<------>case XDP_SETUP_PROG:
<------><------>err = nsim_setup_prog_checks(ns, bpf);
<------><------>if (err)
<------><------><------>return err;
 
<------><------>return nsim_xdp_set_prog(ns, bpf, &ns->xdp);
<------>case XDP_SETUP_PROG_HW:
<------><------>err = nsim_setup_prog_hw_checks(ns, bpf);
<------><------>if (err)
<------><------><------>return err;
 
<------><------>return nsim_xdp_set_prog(ns, bpf, &ns->xdp_hw);
<------>case BPF_OFFLOAD_MAP_ALLOC:
<------><------>if (!ns->bpf_map_accept)
<------><------><------>return -EOPNOTSUPP;
 
<------><------>return nsim_bpf_map_alloc(ns, bpf->offmap);
<------>case BPF_OFFLOAD_MAP_FREE:
<------><------>nsim_bpf_map_free(bpf->offmap);
<------><------>return 0;
<------>default:
<------><------>return -EINVAL;
<------>}
}
 
int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
{
<------>int err;
 
<------>INIT_LIST_HEAD(&nsim_dev->bpf_bound_progs);
<------>INIT_LIST_HEAD(&nsim_dev->bpf_bound_maps);
 
<------>nsim_dev->ddir_bpf_bound_progs = debugfs_create_dir("bpf_bound_progs",
<------><------><------><------><------><------><------>    nsim_dev->ddir);
<------>if (IS_ERR(nsim_dev->ddir_bpf_bound_progs))
<------><------>return PTR_ERR(nsim_dev->ddir_bpf_bound_progs);
 
<------>nsim_dev->bpf_dev = bpf_offload_dev_create(&nsim_bpf_dev_ops, nsim_dev);
<------>err = PTR_ERR_OR_ZERO(nsim_dev->bpf_dev);
<------>if (err)
<------><------>return err;
 
<------>nsim_dev->bpf_bind_accept = true;
<------>debugfs_create_bool("bpf_bind_accept", 0600, nsim_dev->ddir,
<------><------><------>    &nsim_dev->bpf_bind_accept);
<------>debugfs_create_u32("bpf_bind_verifier_delay", 0600, nsim_dev->ddir,
<------><------><------>   &nsim_dev->bpf_bind_verifier_delay);
<------>nsim_dev->bpf_bind_verifier_accept = true;
<------>debugfs_create_bool("bpf_bind_verifier_accept", 0600, nsim_dev->ddir,
<------><------><------>    &nsim_dev->bpf_bind_verifier_accept);
<------>return 0;
}
 
void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
{
<------>WARN_ON(!list_empty(&nsim_dev->bpf_bound_progs));
<------>WARN_ON(!list_empty(&nsim_dev->bpf_bound_maps));
<------>bpf_offload_dev_destroy(nsim_dev->bpf_dev);
}
 
int nsim_bpf_init(struct netdevsim *ns)
{
<------>struct dentry *ddir = ns->nsim_dev_port->ddir;
<------>int err;
 
<------>err = bpf_offload_dev_netdev_register(ns->nsim_dev->bpf_dev,
<------><------><------><------><------>      ns->netdev);
<------>if (err)
<------><------>return err;
 
<------>debugfs_create_u32("bpf_offloaded_id", 0400, ddir,
<------><------><------>   &ns->bpf_offloaded_id);
 
<------>ns->bpf_tc_accept = true;
<------>debugfs_create_bool("bpf_tc_accept", 0600, ddir,
<------><------><------>    &ns->bpf_tc_accept);
<------>debugfs_create_bool("bpf_tc_non_bound_accept", 0600, ddir,
<------><------><------>    &ns->bpf_tc_non_bound_accept);
<------>ns->bpf_xdpdrv_accept = true;
<------>debugfs_create_bool("bpf_xdpdrv_accept", 0600, ddir,
<------><------><------>    &ns->bpf_xdpdrv_accept);
<------>ns->bpf_xdpoffload_accept = true;
<------>debugfs_create_bool("bpf_xdpoffload_accept", 0600, ddir,
<------><------><------>    &ns->bpf_xdpoffload_accept);
 
<------>ns->bpf_map_accept = true;
<------>debugfs_create_bool("bpf_map_accept", 0600, ddir,
<------><------><------>    &ns->bpf_map_accept);
 
<------>return 0;
}
 
void nsim_bpf_uninit(struct netdevsim *ns)
{
<------>WARN_ON(ns->xdp.prog);
<------>WARN_ON(ns->xdp_hw.prog);
<------>WARN_ON(ns->bpf_offloaded);
<------>bpf_offload_dev_netdev_unregister(ns->nsim_dev->bpf_dev, ns->netdev);
}