5  * June 1991 as shown in the file COPYING in the top-level directory of this
41 	struct netdevsim *ns;  member
53 	const char **str = file->private;  in nsim_bpf_string_show()
68 	state = env->prog->aux->offload->dev_priv;  in nsim_bpf_verify_insn()
69 	if (state->nsim_dev->bpf_bind_verifier_delay && !insn_idx)  in nsim_bpf_verify_insn()
70 		msleep(state->nsim_dev->bpf_bind_verifier_delay);  in nsim_bpf_verify_insn()
72 	if (insn_idx == env->prog->len - 1) {  in nsim_bpf_verify_insn()
75 		if (!state->nsim_dev->bpf_bind_verifier_accept)  in nsim_bpf_verify_insn()
76 			ret = -EOPNOTSUPP;  in nsim_bpf_verify_insn()
87 static bool nsim_xdp_offload_active(struct netdevsim *ns)  in nsim_xdp_offload_active()  argument
89 	return ns->xdp_hw.prog;  in nsim_xdp_offload_active()
96 	if (!prog || !bpf_prog_is_offloaded(prog->aux))  in nsim_prog_set_loaded()
99 	state = prog->aux->offload->dev_priv;  in nsim_prog_set_loaded()
100 	state->is_loaded = loaded;  in nsim_prog_set_loaded()
104 nsim_bpf_offload(struct netdevsim *ns, struct bpf_prog *prog, bool oldprog)  in nsim_bpf_offload()  argument
106 	nsim_prog_set_loaded(ns->bpf_offloaded, false);  in nsim_bpf_offload()
108 	WARN(!!ns->bpf_offloaded != oldprog,  in nsim_bpf_offload()
111 	ns->bpf_offloaded = prog;  in nsim_bpf_offload()
112 	ns->bpf_offloaded_id = prog ? prog->aux->id : 0;  in nsim_bpf_offload()
122 	struct bpf_prog *prog = cls_bpf->prog;  in nsim_bpf_setup_tc_block_cb()
123 	struct netdevsim *ns = cb_priv;  in nsim_bpf_setup_tc_block_cb()  local
127 		NSIM_EA(cls_bpf->common.extack,  in nsim_bpf_setup_tc_block_cb()
129 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
132 	if (!tc_cls_can_offload_and_chain0(ns->netdev, &cls_bpf->common))  in nsim_bpf_setup_tc_block_cb()
133 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
135 	if (cls_bpf->common.protocol != htons(ETH_P_ALL)) {  in nsim_bpf_setup_tc_block_cb()
136 		NSIM_EA(cls_bpf->common.extack,  in nsim_bpf_setup_tc_block_cb()
138 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
141 	if (!ns->bpf_tc_accept) {  in nsim_bpf_setup_tc_block_cb()
142 		NSIM_EA(cls_bpf->common.extack,  in nsim_bpf_setup_tc_block_cb()
144 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
147 	if (prog && !prog->aux->offload && !ns->bpf_tc_non_bound_accept) {  in nsim_bpf_setup_tc_block_cb()
148 		NSIM_EA(cls_bpf->common.extack,  in nsim_bpf_setup_tc_block_cb()
150 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
153 	if (cls_bpf->command != TC_CLSBPF_OFFLOAD)  in nsim_bpf_setup_tc_block_cb()
154 		return -EOPNOTSUPP;  in nsim_bpf_setup_tc_block_cb()
156 	oldprog = cls_bpf->oldprog;  in nsim_bpf_setup_tc_block_cb()
159 	if (ns->bpf_offloaded != oldprog) {  in nsim_bpf_setup_tc_block_cb()
161 		if (!cls_bpf->prog)  in nsim_bpf_setup_tc_block_cb()
163 		if (ns->bpf_offloaded) {  in nsim_bpf_setup_tc_block_cb()
164 			NSIM_EA(cls_bpf->common.extack,  in nsim_bpf_setup_tc_block_cb()
166 			return -EBUSY;  in nsim_bpf_setup_tc_block_cb()
170 	return nsim_bpf_offload(ns, cls_bpf->prog, oldprog);  in nsim_bpf_setup_tc_block_cb()
173 int nsim_bpf_disable_tc(struct netdevsim *ns)  in nsim_bpf_disable_tc()  argument
175 	if (ns->bpf_offloaded && !nsim_xdp_offload_active(ns))  in nsim_bpf_disable_tc()
176 		return -EBUSY;  in nsim_bpf_disable_tc()
180 static int nsim_xdp_offload_prog(struct netdevsim *ns, struct netdev_bpf *bpf)  in nsim_xdp_offload_prog()  argument
182 	if (!nsim_xdp_offload_active(ns) && !bpf->prog)  in nsim_xdp_offload_prog()
184 	if (!nsim_xdp_offload_active(ns) && bpf->prog && ns->bpf_offloaded) {  in nsim_xdp_offload_prog()
185 		NSIM_EA(bpf->extack, "TC program is already loaded");  in nsim_xdp_offload_prog()
186 		return -EBUSY;  in nsim_xdp_offload_prog()
189 	return nsim_bpf_offload(ns, bpf->prog, nsim_xdp_offload_active(ns));  in nsim_xdp_offload_prog()
193 nsim_xdp_set_prog(struct netdevsim *ns, struct netdev_bpf *bpf,  in nsim_xdp_set_prog()  argument
198 	if (bpf->command == XDP_SETUP_PROG && !ns->bpf_xdpdrv_accept) {  in nsim_xdp_set_prog()
199 		NSIM_EA(bpf->extack, "driver XDP disabled in DebugFS");  in nsim_xdp_set_prog()
200 		return -EOPNOTSUPP;  in nsim_xdp_set_prog()
202 	if (bpf->command == XDP_SETUP_PROG_HW && !ns->bpf_xdpoffload_accept) {  in nsim_xdp_set_prog()
203 		NSIM_EA(bpf->extack, "XDP offload disabled in DebugFS");  in nsim_xdp_set_prog()
204 		return -EOPNOTSUPP;  in nsim_xdp_set_prog()
207 	if (bpf->command == XDP_SETUP_PROG_HW) {  in nsim_xdp_set_prog()
208 		err = nsim_xdp_offload_prog(ns, bpf);  in nsim_xdp_set_prog()
227 		return -ENOMEM;  in nsim_bpf_create_prog()
229 	state->nsim_dev = nsim_dev;  in nsim_bpf_create_prog()
230 	state->prog = prog;  in nsim_bpf_create_prog()
231 	state->state = "verify";  in nsim_bpf_create_prog()
234 	sprintf(name, "%u", nsim_dev->prog_id_gen++);  in nsim_bpf_create_prog()
235 	state->ddir = debugfs_create_dir(name, nsim_dev->ddir_bpf_bound_progs);  in nsim_bpf_create_prog()
236 	if (IS_ERR(state->ddir)) {  in nsim_bpf_create_prog()
237 		ret = PTR_ERR(state->ddir);  in nsim_bpf_create_prog()
242 	debugfs_create_u32("id", 0400, state->ddir, &prog->aux->id);  in nsim_bpf_create_prog()
243 	debugfs_create_file("state", 0400, state->ddir,  in nsim_bpf_create_prog()
244 			    &state->state, &nsim_bpf_string_fops);  in nsim_bpf_create_prog()
245 	debugfs_create_bool("loaded", 0400, state->ddir, &state->is_loaded);  in nsim_bpf_create_prog()
247 	list_add_tail(&state->l, &nsim_dev->bpf_bound_progs);  in nsim_bpf_create_prog()
249 	prog->aux->offload->dev_priv = state;  in nsim_bpf_create_prog()
257 			bpf_offload_dev_priv(prog->aux->offload->offdev);  in nsim_bpf_verifier_prep()
259 	if (!nsim_dev->bpf_bind_accept)  in nsim_bpf_verifier_prep()
260 		return -EOPNOTSUPP;  in nsim_bpf_verifier_prep()
267 	struct nsim_bpf_bound_prog *state = prog->aux->offload->dev_priv;  in nsim_bpf_translate()
269 	state->state = "xlated";  in nsim_bpf_translate()
277 	state = prog->aux->offload->dev_priv;  in nsim_bpf_destroy_prog()
278 	WARN(state->is_loaded,  in nsim_bpf_destroy_prog()
280 	debugfs_remove_recursive(state->ddir);  in nsim_bpf_destroy_prog()
281 	list_del(&state->l);  in nsim_bpf_destroy_prog()
293 static int nsim_setup_prog_checks(struct netdevsim *ns, struct netdev_bpf *bpf)  in nsim_setup_prog_checks()  argument
295 	if (bpf->prog && bpf->prog->aux->offload) {  in nsim_setup_prog_checks()
296 		NSIM_EA(bpf->extack, "attempt to load offloaded prog to drv");  in nsim_setup_prog_checks()
297 		return -EINVAL;  in nsim_setup_prog_checks()
299 	if (bpf->prog && !bpf->prog->aux->xdp_has_frags &&  in nsim_setup_prog_checks()
300 	    ns->netdev->mtu > NSIM_XDP_MAX_MTU) {  in nsim_setup_prog_checks()
301 		NSIM_EA(bpf->extack, "MTU too large w/ XDP enabled");  in nsim_setup_prog_checks()
302 		return -EINVAL;  in nsim_setup_prog_checks()
308 nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf)  in nsim_setup_prog_hw_checks()  argument
312 	if (!bpf->prog)  in nsim_setup_prog_hw_checks()
315 	if (!bpf_prog_is_offloaded(bpf->prog->aux)) {  in nsim_setup_prog_hw_checks()
316 		NSIM_EA(bpf->extack, "xdpoffload of non-bound program");  in nsim_setup_prog_hw_checks()
317 		return -EINVAL;  in nsim_setup_prog_hw_checks()
320 	state = bpf->prog->aux->offload->dev_priv;  in nsim_setup_prog_hw_checks()
321 	if (WARN_ON(strcmp(state->state, "xlated"))) {  in nsim_setup_prog_hw_checks()
322 		NSIM_EA(bpf->extack, "offloading program in bad state");  in nsim_setup_prog_hw_checks()
323 		return -EINVAL;  in nsim_setup_prog_hw_checks()
331 	return e->key && !memcmp(key, e->key, map->key_size);  in nsim_map_key_match()
336 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_key_find()
339 	for (i = 0; i < ARRAY_SIZE(nmap->entry); i++)  in nsim_map_key_find()
340 		if (nsim_map_key_match(&offmap->map, &nmap->entry[i], key))  in nsim_map_key_find()
343 	return -ENOENT;  in nsim_map_key_find()
349 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_alloc_elem()
351 	nmap->entry[idx].key = kmalloc(offmap->map.key_size,  in nsim_map_alloc_elem()
353 	if (!nmap->entry[idx].key)  in nsim_map_alloc_elem()
354 		return -ENOMEM;  in nsim_map_alloc_elem()
355 	nmap->entry[idx].value = kmalloc(offmap->map.value_size,  in nsim_map_alloc_elem()
357 	if (!nmap->entry[idx].value) {  in nsim_map_alloc_elem()
358 		kfree(nmap->entry[idx].key);  in nsim_map_alloc_elem()
359 		nmap->entry[idx].key = NULL;  in nsim_map_alloc_elem()
360 		return -ENOMEM;  in nsim_map_alloc_elem()
370 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_get_next_key()
371 	int idx = -ENOENT;  in nsim_map_get_next_key()
373 	mutex_lock(&nmap->mutex);  in nsim_map_get_next_key()
377 	if (idx == -ENOENT)  in nsim_map_get_next_key()
382 	for (; idx < ARRAY_SIZE(nmap->entry); idx++) {  in nsim_map_get_next_key()
383 		if (nmap->entry[idx].key) {  in nsim_map_get_next_key()
384 			memcpy(next_key, nmap->entry[idx].key,  in nsim_map_get_next_key()
385 			       offmap->map.key_size);  in nsim_map_get_next_key()
390 	mutex_unlock(&nmap->mutex);  in nsim_map_get_next_key()
392 	if (idx == ARRAY_SIZE(nmap->entry))  in nsim_map_get_next_key()
393 		return -ENOENT;  in nsim_map_get_next_key()
400 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_lookup_elem()
403 	mutex_lock(&nmap->mutex);  in nsim_map_lookup_elem()
407 		memcpy(value, nmap->entry[idx].value, offmap->map.value_size);  in nsim_map_lookup_elem()
409 	mutex_unlock(&nmap->mutex);  in nsim_map_lookup_elem()
418 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_update_elem()
421 	mutex_lock(&nmap->mutex);  in nsim_map_update_elem()
429 		err = -EEXIST;  in nsim_map_update_elem()
434 		for (idx = 0; idx < ARRAY_SIZE(nmap->entry); idx++)  in nsim_map_update_elem()
435 			if (!nmap->entry[idx].key)  in nsim_map_update_elem()
437 		if (idx == ARRAY_SIZE(nmap->entry)) {  in nsim_map_update_elem()
438 			err = -E2BIG;  in nsim_map_update_elem()
447 	memcpy(nmap->entry[idx].key, key, offmap->map.key_size);  in nsim_map_update_elem()
448 	memcpy(nmap->entry[idx].value, value, offmap->map.value_size);  in nsim_map_update_elem()
450 	mutex_unlock(&nmap->mutex);  in nsim_map_update_elem()
457 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_map_delete_elem()
460 	if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY)  in nsim_map_delete_elem()
461 		return -EINVAL;  in nsim_map_delete_elem()
463 	mutex_lock(&nmap->mutex);  in nsim_map_delete_elem()
467 		kfree(nmap->entry[idx].key);  in nsim_map_delete_elem()
468 		kfree(nmap->entry[idx].value);  in nsim_map_delete_elem()
469 		memset(&nmap->entry[idx], 0, sizeof(nmap->entry[idx]));  in nsim_map_delete_elem()
472 	mutex_unlock(&nmap->mutex);  in nsim_map_delete_elem()
485 nsim_bpf_map_alloc(struct netdevsim *ns, struct bpf_offloaded_map *offmap)  in nsim_bpf_map_alloc()  argument
490 	if (WARN_ON(offmap->map.map_type != BPF_MAP_TYPE_ARRAY &&  in nsim_bpf_map_alloc()
491 		    offmap->map.map_type != BPF_MAP_TYPE_HASH))  in nsim_bpf_map_alloc()
492 		return -EINVAL;  in nsim_bpf_map_alloc()
493 	if (offmap->map.max_entries > NSIM_BPF_MAX_KEYS)  in nsim_bpf_map_alloc()
494 		return -ENOMEM;  in nsim_bpf_map_alloc()
495 	if (offmap->map.map_flags)  in nsim_bpf_map_alloc()
496 		return -EINVAL;  in nsim_bpf_map_alloc()
500 		return -ENOMEM;  in nsim_bpf_map_alloc()
502 	offmap->dev_priv = nmap;  in nsim_bpf_map_alloc()
503 	nmap->ns = ns;  in nsim_bpf_map_alloc()
504 	nmap->map = offmap;  in nsim_bpf_map_alloc()
505 	mutex_init(&nmap->mutex);  in nsim_bpf_map_alloc()
507 	if (offmap->map.map_type == BPF_MAP_TYPE_ARRAY) {  in nsim_bpf_map_alloc()
508 		for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {  in nsim_bpf_map_alloc()
514 			key = nmap->entry[i].key;  in nsim_bpf_map_alloc()
516 			memset(nmap->entry[i].value, 0, offmap->map.value_size);  in nsim_bpf_map_alloc()
520 	offmap->dev_ops = &nsim_bpf_map_ops;  in nsim_bpf_map_alloc()
521 	list_add_tail(&nmap->l, &ns->nsim_dev->bpf_bound_maps);  in nsim_bpf_map_alloc()
526 	while (--i >= 0) {  in nsim_bpf_map_alloc()
527 		kfree(nmap->entry[i].key);  in nsim_bpf_map_alloc()
528 		kfree(nmap->entry[i].value);  in nsim_bpf_map_alloc()
536 	struct nsim_bpf_bound_map *nmap = offmap->dev_priv;  in nsim_bpf_map_free()
539 	for (i = 0; i < ARRAY_SIZE(nmap->entry); i++) {  in nsim_bpf_map_free()
540 		kfree(nmap->entry[i].key);  in nsim_bpf_map_free()
541 		kfree(nmap->entry[i].value);  in nsim_bpf_map_free()
543 	list_del_init(&nmap->l);  in nsim_bpf_map_free()
544 	mutex_destroy(&nmap->mutex);  in nsim_bpf_map_free()
550 	struct netdevsim *ns = netdev_priv(dev);  in nsim_bpf()  local
555 	switch (bpf->command) {  in nsim_bpf()
557 		err = nsim_setup_prog_checks(ns, bpf);  in nsim_bpf()
561 		return nsim_xdp_set_prog(ns, bpf, &ns->xdp);  in nsim_bpf()
563 		err = nsim_setup_prog_hw_checks(ns, bpf);  in nsim_bpf()
567 		return nsim_xdp_set_prog(ns, bpf, &ns->xdp_hw);  in nsim_bpf()
569 		if (!ns->bpf_map_accept)  in nsim_bpf()
570 			return -EOPNOTSUPP;  in nsim_bpf()
572 		return nsim_bpf_map_alloc(ns, bpf->offmap);  in nsim_bpf()
574 		nsim_bpf_map_free(bpf->offmap);  in nsim_bpf()
577 		return -EINVAL;  in nsim_bpf()
585 	INIT_LIST_HEAD(&nsim_dev->bpf_bound_progs);  in nsim_bpf_dev_init()
586 	INIT_LIST_HEAD(&nsim_dev->bpf_bound_maps);  in nsim_bpf_dev_init()
588 	nsim_dev->ddir_bpf_bound_progs = debugfs_create_dir("bpf_bound_progs",  in nsim_bpf_dev_init()
589 							    nsim_dev->ddir);  in nsim_bpf_dev_init()
590 	if (IS_ERR(nsim_dev->ddir_bpf_bound_progs))  in nsim_bpf_dev_init()
591 		return PTR_ERR(nsim_dev->ddir_bpf_bound_progs);  in nsim_bpf_dev_init()
593 	nsim_dev->bpf_dev = bpf_offload_dev_create(&nsim_bpf_dev_ops, nsim_dev);  in nsim_bpf_dev_init()
594 	err = PTR_ERR_OR_ZERO(nsim_dev->bpf_dev);  in nsim_bpf_dev_init()
598 	nsim_dev->bpf_bind_accept = true;  in nsim_bpf_dev_init()
599 	debugfs_create_bool("bpf_bind_accept", 0600, nsim_dev->ddir,  in nsim_bpf_dev_init()
600 			    &nsim_dev->bpf_bind_accept);  in nsim_bpf_dev_init()
601 	debugfs_create_u32("bpf_bind_verifier_delay", 0600, nsim_dev->ddir,  in nsim_bpf_dev_init()
602 			   &nsim_dev->bpf_bind_verifier_delay);  in nsim_bpf_dev_init()
603 	nsim_dev->bpf_bind_verifier_accept = true;  in nsim_bpf_dev_init()
604 	debugfs_create_bool("bpf_bind_verifier_accept", 0600, nsim_dev->ddir,  in nsim_bpf_dev_init()
605 			    &nsim_dev->bpf_bind_verifier_accept);  in nsim_bpf_dev_init()
611 	WARN_ON(!list_empty(&nsim_dev->bpf_bound_progs));  in nsim_bpf_dev_exit()
612 	WARN_ON(!list_empty(&nsim_dev->bpf_bound_maps));  in nsim_bpf_dev_exit()
613 	bpf_offload_dev_destroy(nsim_dev->bpf_dev);  in nsim_bpf_dev_exit()
616 int nsim_bpf_init(struct netdevsim *ns)  in nsim_bpf_init()  argument
618 	struct dentry *ddir = ns->nsim_dev_port->ddir;  in nsim_bpf_init()
621 	err = bpf_offload_dev_netdev_register(ns->nsim_dev->bpf_dev,  in nsim_bpf_init()
622 					      ns->netdev);  in nsim_bpf_init()
627 			   &ns->bpf_offloaded_id);  in nsim_bpf_init()
629 	ns->bpf_tc_accept = true;  in nsim_bpf_init()
631 			    &ns->bpf_tc_accept);  in nsim_bpf_init()
633 			    &ns->bpf_tc_non_bound_accept);  in nsim_bpf_init()
634 	ns->bpf_xdpdrv_accept = true;  in nsim_bpf_init()
636 			    &ns->bpf_xdpdrv_accept);  in nsim_bpf_init()
637 	ns->bpf_xdpoffload_accept = true;  in nsim_bpf_init()
639 			    &ns->bpf_xdpoffload_accept);  in nsim_bpf_init()
641 	ns->bpf_map_accept = true;  in nsim_bpf_init()
643 			    &ns->bpf_map_accept);  in nsim_bpf_init()
648 void nsim_bpf_uninit(struct netdevsim *ns)  in nsim_bpf_uninit()  argument
650 	WARN_ON(ns->xdp.prog);  in nsim_bpf_uninit()
651 	WARN_ON(ns->xdp_hw.prog);  in nsim_bpf_uninit()
652 	WARN_ON(ns->bpf_offloaded);  in nsim_bpf_uninit()
653 	bpf_offload_dev_netdev_unregister(ns->nsim_dev->bpf_dev, ns->netdev);  in nsim_bpf_uninit()