[linux-2.6-block.git] / net / bpf / test_run.c

/* Copyright (c) 2017 Facebook
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#include <linux/bpf.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/etherdevice.h>
#include <linux/filter.h>
#include <linux/sched/signal.h>
#include <net/sock.h>
#include <net/tcp.h>

static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
			u32 *retval, u32 *time)
{
	struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE] = { NULL };
	enum bpf_cgroup_storage_type stype;
	u64 time_start, time_spent = 0;
	int ret = 0;
	u32 i;

	for_each_cgroup_storage_type(stype) {
		storage[stype] = bpf_cgroup_storage_alloc(prog, stype);
		if (IS_ERR(storage[stype])) {
			storage[stype] = NULL;
			for_each_cgroup_storage_type(stype)
				bpf_cgroup_storage_free(storage[stype]);
			return -ENOMEM;
		}
	}

	if (!repeat)
		repeat = 1;

	rcu_read_lock();
	preempt_disable();
	time_start = ktime_get_ns();
	for (i = 0; i < repeat; i++) {
		bpf_cgroup_storage_set(storage);
		*retval = BPF_PROG_RUN(prog, ctx);

		if (signal_pending(current)) {
			ret = -EINTR;
			break;
		}

		if (need_resched()) {
			time_spent += ktime_get_ns() - time_start;
			preempt_enable();
			rcu_read_unlock();

			cond_resched();

			rcu_read_lock();
			preempt_disable();
			time_start = ktime_get_ns();
		}
	}
	time_spent += ktime_get_ns() - time_start;
	preempt_enable();
	rcu_read_unlock();

	do_div(time_spent, repeat);
	*time = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;

	for_each_cgroup_storage_type(stype)
		bpf_cgroup_storage_free(storage[stype]);

	return ret;
}

static int bpf_test_finish(const union bpf_attr *kattr,
			   union bpf_attr __user *uattr, const void *data,
			   u32 size, u32 retval, u32 duration)
{
	void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
	int err = -EFAULT;
	u32 copy_size = size;

	/* Clamp copy if the user has provided a size hint, but copy the full
	 * buffer if not to retain old behaviour.
	 */
	if (kattr->test.data_size_out &&
	    copy_size > kattr->test.data_size_out) {
		copy_size = kattr->test.data_size_out;
		err = -ENOSPC;
	}

	if (data_out && copy_to_user(data_out, data, copy_size))
		goto out;
	if (copy_to_user(&uattr->test.data_size_out, &size, sizeof(size)))
		goto out;
	if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
		goto out;
	if (copy_to_user(&uattr->test.duration, &duration, sizeof(duration)))
		goto out;
	if (err != -ENOSPC)
		err = 0;
out:
	return err;
}

static void *bpf_test_init(const union bpf_attr *kattr, u32 size,
			   u32 headroom, u32 tailroom)
{
	void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
	void *data;

	if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom)
		return ERR_PTR(-EINVAL);

	data = kzalloc(size + headroom + tailroom, GFP_USER);
	if (!data)
		return ERR_PTR(-ENOMEM);

	if (copy_from_user(data + headroom, data_in, size)) {
		kfree(data);
		return ERR_PTR(-EFAULT);
	}
	return data;
}

static void *bpf_ctx_init(const union bpf_attr *kattr, u32 max_size)
{
	void __user *data_in = u64_to_user_ptr(kattr->test.ctx_in);
	void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
	u32 size = kattr->test.ctx_size_in;
	void *data;
	int err;

	if (!data_in && !data_out)
		return NULL;

	data = kzalloc(max_size, GFP_USER);
	if (!data)
		return ERR_PTR(-ENOMEM);

	if (data_in) {
		err = bpf_check_uarg_tail_zero(data_in, max_size, size);
		if (err) {
			kfree(data);
			return ERR_PTR(err);
		}

		size = min_t(u32, max_size, size);
		if (copy_from_user(data, data_in, size)) {
			kfree(data);
			return ERR_PTR(-EFAULT);
		}
	}
	return data;
}

static int bpf_ctx_finish(const union bpf_attr *kattr,
			  union bpf_attr __user *uattr, const void *data,
			  u32 size)
{
	void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
	int err = -EFAULT;
	u32 copy_size = size;

	if (!data || !data_out)
		return 0;

	if (copy_size > kattr->test.ctx_size_out) {
		copy_size = kattr->test.ctx_size_out;
		err = -ENOSPC;
	}

	if (copy_to_user(data_out, data, copy_size))
		goto out;
	if (copy_to_user(&uattr->test.ctx_size_out, &size, sizeof(size)))
		goto out;
	if (err != -ENOSPC)
		err = 0;
out:
	return err;
}

/**
 * range_is_zero - test whether buffer is initialized
 * @buf: buffer to check
 * @from: check from this position
 * @to: check up until (excluding) this position
 *
 * This function returns true if the there is a non-zero byte
 * in the buf in the range [from,to).
 */
static inline bool range_is_zero(void *buf, size_t from, size_t to)
{
	return !memchr_inv((u8 *)buf + from, 0, to - from);
}

static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb)
{
	struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;

	if (!__skb)
		return 0;

	/* make sure the fields we don't use are zeroed */
	if (!range_is_zero(__skb, 0, offsetof(struct __sk_buff, priority)))
		return -EINVAL;

	/* priority is allowed */

	if (!range_is_zero(__skb, offsetof(struct __sk_buff, priority) +
			   FIELD_SIZEOF(struct __sk_buff, priority),
			   offsetof(struct __sk_buff, cb)))
		return -EINVAL;

	/* cb is allowed */

	if (!range_is_zero(__skb, offsetof(struct __sk_buff, cb) +
			   FIELD_SIZEOF(struct __sk_buff, cb),
			   sizeof(struct __sk_buff)))
		return -EINVAL;

	skb->priority = __skb->priority;
	memcpy(&cb->data, __skb->cb, QDISC_CB_PRIV_LEN);

	return 0;
}

static void convert_skb_to___skb(struct sk_buff *skb, struct __sk_buff *__skb)
{
	struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;

	if (!__skb)
		return;

	__skb->priority = skb->priority;
	memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN);
}

int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
			  union bpf_attr __user *uattr)
{
	bool is_l2 = false, is_direct_pkt_access = false;
	u32 size = kattr->test.data_size_in;
	u32 repeat = kattr->test.repeat;
	struct __sk_buff *ctx = NULL;
	u32 retval, duration;
	int hh_len = ETH_HLEN;
	struct sk_buff *skb;
	struct sock *sk;
	void *data;
	int ret;

	data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
			     SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
	if (IS_ERR(data))
		return PTR_ERR(data);

	ctx = bpf_ctx_init(kattr, sizeof(struct __sk_buff));
	if (IS_ERR(ctx)) {
		kfree(data);
		return PTR_ERR(ctx);
	}

	switch (prog->type) {
	case BPF_PROG_TYPE_SCHED_CLS:
	case BPF_PROG_TYPE_SCHED_ACT:
		is_l2 = true;
		/* fall through */
	case BPF_PROG_TYPE_LWT_IN:
	case BPF_PROG_TYPE_LWT_OUT:
	case BPF_PROG_TYPE_LWT_XMIT:
		is_direct_pkt_access = true;
		break;
	default:
		break;
	}

	sk = kzalloc(sizeof(struct sock), GFP_USER);
	if (!sk) {
		kfree(data);
		kfree(ctx);
		return -ENOMEM;
	}
	sock_net_set(sk, current->nsproxy->net_ns);
	sock_init_data(NULL, sk);

	skb = build_skb(data, 0);
	if (!skb) {
		kfree(data);
		kfree(ctx);
		kfree(sk);
		return -ENOMEM;
	}
	skb->sk = sk;

	skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
	__skb_put(skb, size);
	skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev);
	skb_reset_network_header(skb);

	if (is_l2)
		__skb_push(skb, hh_len);
	if (is_direct_pkt_access)
		bpf_compute_data_pointers(skb);
	ret = convert___skb_to_skb(skb, ctx);
	if (ret)
		goto out;
	ret = bpf_test_run(prog, skb, repeat, &retval, &duration);
	if (ret)
		goto out;
	if (!is_l2) {
		if (skb_headroom(skb) < hh_len) {
			int nhead = HH_DATA_ALIGN(hh_len - skb_headroom(skb));

			if (pskb_expand_head(skb, nhead, 0, GFP_USER)) {
				ret = -ENOMEM;
				goto out;
			}
		}
		memset(__skb_push(skb, hh_len), 0, hh_len);
	}
	convert_skb_to___skb(skb, ctx);

	size = skb->len;
	/* bpf program can never convert linear skb to non-linear */
	if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
		size = skb_headlen(skb);
	ret = bpf_test_finish(kattr, uattr, skb->data, size, retval, duration);
	if (!ret)
		ret = bpf_ctx_finish(kattr, uattr, ctx,
				     sizeof(struct __sk_buff));
out:
	kfree_skb(skb);
	kfree(sk);
	kfree(ctx);
	return ret;
}

int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
			  union bpf_attr __user *uattr)
{
	u32 size = kattr->test.data_size_in;
	u32 repeat = kattr->test.repeat;
	struct netdev_rx_queue *rxqueue;
	struct xdp_buff xdp = {};
	u32 retval, duration;
	void *data;
	int ret;

	if (kattr->test.ctx_in || kattr->test.ctx_out)
		return -EINVAL;

	data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0);
	if (IS_ERR(data))
		return PTR_ERR(data);

	xdp.data_hard_start = data;
	xdp.data = data + XDP_PACKET_HEADROOM + NET_IP_ALIGN;
	xdp.data_meta = xdp.data;
	xdp.data_end = xdp.data + size;

	rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
	xdp.rxq = &rxqueue->xdp_rxq;

	ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration);
	if (ret)
		goto out;
	if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN ||
	    xdp.data_end != xdp.data + size)
		size = xdp.data_end - xdp.data;
	ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration);
out:
	kfree(data);
	return ret;
}

int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
				     const union bpf_attr *kattr,
				     union bpf_attr __user *uattr)
{
	u32 size = kattr->test.data_size_in;
	u32 repeat = kattr->test.repeat;
	struct bpf_flow_keys flow_keys;
	u64 time_start, time_spent = 0;
	u32 retval, duration;
	struct sk_buff *skb;
	struct sock *sk;
	void *data;
	int ret;
	u32 i;

	if (prog->type != BPF_PROG_TYPE_FLOW_DISSECTOR)
		return -EINVAL;

	if (kattr->test.ctx_in || kattr->test.ctx_out)
		return -EINVAL;

	data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
			     SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
	if (IS_ERR(data))
		return PTR_ERR(data);

	sk = kzalloc(sizeof(*sk), GFP_USER);
	if (!sk) {
		kfree(data);
		return -ENOMEM;
	}
	sock_net_set(sk, current->nsproxy->net_ns);
	sock_init_data(NULL, sk);

	skb = build_skb(data, 0);
	if (!skb) {
		kfree(data);
		kfree(sk);
		return -ENOMEM;
	}
	skb->sk = sk;

	skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
	__skb_put(skb, size);
	skb->protocol = eth_type_trans(skb,
				       current->nsproxy->net_ns->loopback_dev);
	skb_reset_network_header(skb);

	if (!repeat)
		repeat = 1;

	rcu_read_lock();
	preempt_disable();
	time_start = ktime_get_ns();
	for (i = 0; i < repeat; i++) {
		retval = __skb_flow_bpf_dissect(prog, skb,
						&flow_keys_dissector,
						&flow_keys);

		if (signal_pending(current)) {
			preempt_enable();
			rcu_read_unlock();

			ret = -EINTR;
			goto out;
		}

		if (need_resched()) {
			time_spent += ktime_get_ns() - time_start;
			preempt_enable();
			rcu_read_unlock();

			cond_resched();

			rcu_read_lock();
			preempt_disable();
			time_start = ktime_get_ns();
		}
	}
	time_spent += ktime_get_ns() - time_start;
	preempt_enable();
	rcu_read_unlock();

	do_div(time_spent, repeat);
	duration = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;

	ret = bpf_test_finish(kattr, uattr, &flow_keys, sizeof(flow_keys),
			      retval, duration);

out:
	kfree_skb(skb);
	kfree(sk);
	return ret;
}
Commit	Line	Data
1cf1cae9 AS	1	/* Copyright (c) 2017 Facebook
	2	*
	3	* This program is free software; you can redistribute it and/or
	4	* modify it under the terms of version 2 of the GNU General Public
	5	* License as published by the Free Software Foundation.
	6	*/
	7	#include <linux/bpf.h>
	8	#include <linux/slab.h>
	9	#include <linux/vmalloc.h>
	10	#include <linux/etherdevice.h>
	11	#include <linux/filter.h>
	12	#include <linux/sched/signal.h>
2cb494a3 SL	13	#include <net/sock.h>
2cb494a3 SL	14	#include <net/tcp.h>
1cf1cae9	15
df1a2cb7 SF	16	static int bpf_test_run(struct bpf_prog prog, void ctx, u32 repeat,
df1a2cb7 SF	17	u32 retval, u32 time)
1cf1cae9	18	{
71b91a50	19	struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE] = { NULL };
8bad74f9	20	enum bpf_cgroup_storage_type stype;
1cf1cae9	21	u64 time_start, time_spent = 0;
df1a2cb7	22	int ret = 0;
dcb40590	23	u32 i;
1cf1cae9	24
8bad74f9 RG	25	for_each_cgroup_storage_type(stype) {
	26	storage[stype] = bpf_cgroup_storage_alloc(prog, stype);
	27	if (IS_ERR(storage[stype])) {
	28	storage[stype] = NULL;
	29	for_each_cgroup_storage_type(stype)
	30	bpf_cgroup_storage_free(storage[stype]);
	31	return -ENOMEM;
	32	}
	33	}
f42ee093	34
1cf1cae9 AS	35	if (!repeat)
1cf1cae9 AS	36	repeat = 1;
df1a2cb7 SF	37
	38	rcu_read_lock();
	39	preempt_disable();
1cf1cae9 AS	40	time_start = ktime_get_ns();
1cf1cae9 AS	41	for (i = 0; i < repeat; i++) {
df1a2cb7 SF	42	bpf_cgroup_storage_set(storage);
	43	*retval = BPF_PROG_RUN(prog, ctx);
	44
	45	if (signal_pending(current)) {
	46	ret = -EINTR;
	47	break;
	48	}
	49
1cf1cae9	50	if (need_resched()) {
1cf1cae9	51	time_spent += ktime_get_ns() - time_start;
df1a2cb7 SF	52	preempt_enable();
	53	rcu_read_unlock();
	54
1cf1cae9	55	cond_resched();
df1a2cb7 SF	56
	57	rcu_read_lock();
	58	preempt_disable();
1cf1cae9 AS	59	time_start = ktime_get_ns();
	60	}
	61	}
	62	time_spent += ktime_get_ns() - time_start;
df1a2cb7 SF	63	preempt_enable();
	64	rcu_read_unlock();
	65
1cf1cae9 AS	66	do_div(time_spent, repeat);
	67	*time = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;
	68
8bad74f9 RG	69	for_each_cgroup_storage_type(stype)
8bad74f9 RG	70	bpf_cgroup_storage_free(storage[stype]);
f42ee093	71
df1a2cb7	72	return ret;
1cf1cae9 AS	73	}
1cf1cae9 AS	74
78e52272 DM	75	static int bpf_test_finish(const union bpf_attr *kattr,
78e52272 DM	76	union bpf_attr __user uattr, const void data,
1cf1cae9 AS	77	u32 size, u32 retval, u32 duration)
1cf1cae9 AS	78	{
78e52272	79	void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
1cf1cae9	80	int err = -EFAULT;
b5a36b1e	81	u32 copy_size = size;
1cf1cae9	82
b5a36b1e LB	83	/* Clamp copy if the user has provided a size hint, but copy the full
	84	* buffer if not to retain old behaviour.
	85	*/
	86	if (kattr->test.data_size_out &&
	87	copy_size > kattr->test.data_size_out) {
	88	copy_size = kattr->test.data_size_out;
	89	err = -ENOSPC;
	90	}
	91
	92	if (data_out && copy_to_user(data_out, data, copy_size))
1cf1cae9 AS	93	goto out;
	94	if (copy_to_user(&uattr->test.data_size_out, &size, sizeof(size)))
	95	goto out;
	96	if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
	97	goto out;
	98	if (copy_to_user(&uattr->test.duration, &duration, sizeof(duration)))
	99	goto out;
b5a36b1e LB	100	if (err != -ENOSPC)
b5a36b1e LB	101	err = 0;
1cf1cae9 AS	102	out:
	103	return err;
	104	}
	105
	106	static void bpf_test_init(const union bpf_attr kattr, u32 size,
	107	u32 headroom, u32 tailroom)
	108	{
	109	void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
	110	void *data;
	111
	112	if (size < ETH_HLEN \|\| size > PAGE_SIZE - headroom - tailroom)
	113	return ERR_PTR(-EINVAL);
	114
	115	data = kzalloc(size + headroom + tailroom, GFP_USER);
	116	if (!data)
	117	return ERR_PTR(-ENOMEM);
	118
	119	if (copy_from_user(data + headroom, data_in, size)) {
	120	kfree(data);
	121	return ERR_PTR(-EFAULT);
	122	}
	123	return data;
	124	}
	125
b0b9395d SF	126	static void bpf_ctx_init(const union bpf_attr kattr, u32 max_size)
	127	{
	128	void __user *data_in = u64_to_user_ptr(kattr->test.ctx_in);
	129	void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
	130	u32 size = kattr->test.ctx_size_in;
	131	void *data;
	132	int err;
	133
	134	if (!data_in && !data_out)
	135	return NULL;
	136
	137	data = kzalloc(max_size, GFP_USER);
	138	if (!data)
	139	return ERR_PTR(-ENOMEM);
	140
	141	if (data_in) {
	142	err = bpf_check_uarg_tail_zero(data_in, max_size, size);
	143	if (err) {
	144	kfree(data);
	145	return ERR_PTR(err);
	146	}
	147
	148	size = min_t(u32, max_size, size);
	149	if (copy_from_user(data, data_in, size)) {
	150	kfree(data);
	151	return ERR_PTR(-EFAULT);
	152	}
	153	}
	154	return data;
	155	}
	156
	157	static int bpf_ctx_finish(const union bpf_attr *kattr,
	158	union bpf_attr __user uattr, const void data,
	159	u32 size)
	160	{
	161	void __user *data_out = u64_to_user_ptr(kattr->test.ctx_out);
	162	int err = -EFAULT;
	163	u32 copy_size = size;
	164
	165	if (!data \|\| !data_out)
	166	return 0;
	167
	168	if (copy_size > kattr->test.ctx_size_out) {
	169	copy_size = kattr->test.ctx_size_out;
	170	err = -ENOSPC;
	171	}
	172
	173	if (copy_to_user(data_out, data, copy_size))
	174	goto out;
	175	if (copy_to_user(&uattr->test.ctx_size_out, &size, sizeof(size)))
	176	goto out;
	177	if (err != -ENOSPC)
	178	err = 0;
	179	out:
	180	return err;
	181	}
	182
	183	/**
	184	* range_is_zero - test whether buffer is initialized
	185	* @buf: buffer to check
	186	* @from: check from this position
	187	* @to: check up until (excluding) this position
	188	*
	189	* This function returns true if the there is a non-zero byte
190	* in the buf in the range [from,to).
191	*/
192	static inline bool range_is_zero(void *buf, size_t from, size_t to)
193	{
194	return !memchr_inv((u8 *)buf + from, 0, to - from);
195	}
196
197	static int convert___skb_to_skb(struct sk_buff skb, struct __sk_buff __skb)
198	{
199	struct qdisc_skb_cb cb = (struct qdisc_skb_cb )skb->cb;
200
201	if (!__skb)
202	return 0;
203
204	/* make sure the fields we don't use are zeroed */
205	if (!range_is_zero(__skb, 0, offsetof(struct __sk_buff, priority)))
206	return -EINVAL;
207
208	/* priority is allowed */
209
210	if (!range_is_zero(__skb, offsetof(struct __sk_buff, priority) +
211	FIELD_SIZEOF(struct __sk_buff, priority),
212	offsetof(struct __sk_buff, cb)))
213	return -EINVAL;
214
215	/* cb is allowed */
216
217	if (!range_is_zero(__skb, offsetof(struct __sk_buff, cb) +
218	FIELD_SIZEOF(struct __sk_buff, cb),
219	sizeof(struct __sk_buff)))
220	return -EINVAL;
221
222	skb->priority = __skb->priority;
223	memcpy(&cb->data, __skb->cb, QDISC_CB_PRIV_LEN);
224
225	return 0;
226	}
227
228	static void convert_skb_to___skb(struct sk_buff skb, struct __sk_buff __skb)
229	{
230	struct qdisc_skb_cb cb = (struct qdisc_skb_cb )skb->cb;
231
232	if (!__skb)
233	return;
234
235	__skb->priority = skb->priority;
236	memcpy(__skb->cb, &cb->data, QDISC_CB_PRIV_LEN);
237	}
238
1cf1cae9 AS	239	int bpf_prog_test_run_skb(struct bpf_prog prog, const union bpf_attr kattr,
	240	union bpf_attr __user *uattr)
	241	{
	242	bool is_l2 = false, is_direct_pkt_access = false;
	243	u32 size = kattr->test.data_size_in;
	244	u32 repeat = kattr->test.repeat;
b0b9395d	245	struct __sk_buff *ctx = NULL;
1cf1cae9	246	u32 retval, duration;
6e6fddc7	247	int hh_len = ETH_HLEN;
1cf1cae9	248	struct sk_buff *skb;
2cb494a3	249	struct sock *sk;
1cf1cae9 AS	250	void *data;
	251	int ret;
	252
586f8525	253	data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
1cf1cae9 AS	254	SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
	255	if (IS_ERR(data))
	256	return PTR_ERR(data);
	257
b0b9395d SF	258	ctx = bpf_ctx_init(kattr, sizeof(struct __sk_buff));
	259	if (IS_ERR(ctx)) {
	260	kfree(data);
	261	return PTR_ERR(ctx);
	262	}
	263
1cf1cae9 AS	264	switch (prog->type) {
	265	case BPF_PROG_TYPE_SCHED_CLS:
	266	case BPF_PROG_TYPE_SCHED_ACT:
	267	is_l2 = true;
	268	/* fall through */
	269	case BPF_PROG_TYPE_LWT_IN:
	270	case BPF_PROG_TYPE_LWT_OUT:
	271	case BPF_PROG_TYPE_LWT_XMIT:
	272	is_direct_pkt_access = true;
	273	break;
	274	default:
	275	break;
	276	}
	277
2cb494a3 SL	278	sk = kzalloc(sizeof(struct sock), GFP_USER);
	279	if (!sk) {
	280	kfree(data);
b0b9395d	281	kfree(ctx);
2cb494a3 SL	282	return -ENOMEM;
	283	}
	284	sock_net_set(sk, current->nsproxy->net_ns);
	285	sock_init_data(NULL, sk);
	286
1cf1cae9 AS	287	skb = build_skb(data, 0);
	288	if (!skb) {
	289	kfree(data);
b0b9395d	290	kfree(ctx);
2cb494a3	291	kfree(sk);
1cf1cae9 AS	292	return -ENOMEM;
1cf1cae9 AS	293	}
2cb494a3	294	skb->sk = sk;
1cf1cae9	295
586f8525	296	skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
1cf1cae9 AS	297	__skb_put(skb, size);
	298	skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev);
	299	skb_reset_network_header(skb);
	300
	301	if (is_l2)
6e6fddc7	302	__skb_push(skb, hh_len);
1cf1cae9	303	if (is_direct_pkt_access)
6aaae2b6	304	bpf_compute_data_pointers(skb);
b0b9395d SF	305	ret = convert___skb_to_skb(skb, ctx);
	306	if (ret)
	307	goto out;
dcb40590	308	ret = bpf_test_run(prog, skb, repeat, &retval, &duration);
b0b9395d SF	309	if (ret)
b0b9395d SF	310	goto out;
6e6fddc7 DB	311	if (!is_l2) {
	312	if (skb_headroom(skb) < hh_len) {
	313	int nhead = HH_DATA_ALIGN(hh_len - skb_headroom(skb));
	314
	315	if (pskb_expand_head(skb, nhead, 0, GFP_USER)) {
b0b9395d SF	316	ret = -ENOMEM;
b0b9395d SF	317	goto out;
6e6fddc7 DB	318	}
	319	}
	320	memset(__skb_push(skb, hh_len), 0, hh_len);
	321	}
b0b9395d	322	convert_skb_to___skb(skb, ctx);
6e6fddc7	323
1cf1cae9 AS	324	size = skb->len;
	325	/* bpf program can never convert linear skb to non-linear */
	326	if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
	327	size = skb_headlen(skb);
78e52272	328	ret = bpf_test_finish(kattr, uattr, skb->data, size, retval, duration);
b0b9395d SF	329	if (!ret)
	330	ret = bpf_ctx_finish(kattr, uattr, ctx,
	331	sizeof(struct __sk_buff));
	332	out:
1cf1cae9	333	kfree_skb(skb);
2cb494a3	334	kfree(sk);
b0b9395d	335	kfree(ctx);
1cf1cae9 AS	336	return ret;
	337	}
	338
	339	int bpf_prog_test_run_xdp(struct bpf_prog prog, const union bpf_attr kattr,
	340	union bpf_attr __user *uattr)
	341	{
	342	u32 size = kattr->test.data_size_in;
	343	u32 repeat = kattr->test.repeat;
65073a67	344	struct netdev_rx_queue *rxqueue;
1cf1cae9 AS	345	struct xdp_buff xdp = {};
	346	u32 retval, duration;
	347	void *data;
	348	int ret;
	349
947e8b59 SF	350	if (kattr->test.ctx_in \|\| kattr->test.ctx_out)
	351	return -EINVAL;
	352
586f8525	353	data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM + NET_IP_ALIGN, 0);
1cf1cae9 AS	354	if (IS_ERR(data))
	355	return PTR_ERR(data);
	356
	357	xdp.data_hard_start = data;
586f8525	358	xdp.data = data + XDP_PACKET_HEADROOM + NET_IP_ALIGN;
de8f3a83	359	xdp.data_meta = xdp.data;
1cf1cae9 AS	360	xdp.data_end = xdp.data + size;
1cf1cae9 AS	361
65073a67 DB	362	rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
	363	xdp.rxq = &rxqueue->xdp_rxq;
	364
dcb40590 RG	365	ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration);
	366	if (ret)
	367	goto out;
587b80cc NS	368	if (xdp.data != data + XDP_PACKET_HEADROOM + NET_IP_ALIGN \|\|
587b80cc NS	369	xdp.data_end != xdp.data + size)
1cf1cae9	370	size = xdp.data_end - xdp.data;
78e52272	371	ret = bpf_test_finish(kattr, uattr, xdp.data, size, retval, duration);
dcb40590	372	out:
1cf1cae9 AS	373	kfree(data);
	374	return ret;
	375	}
b7a1848e SF	376
	377	int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
	378	const union bpf_attr *kattr,
	379	union bpf_attr __user *uattr)
	380	{
	381	u32 size = kattr->test.data_size_in;
	382	u32 repeat = kattr->test.repeat;
	383	struct bpf_flow_keys flow_keys;
	384	u64 time_start, time_spent = 0;
b7a1848e SF	385	u32 retval, duration;
	386	struct sk_buff *skb;
	387	struct sock *sk;
	388	void *data;
	389	int ret;
	390	u32 i;
	391
	392	if (prog->type != BPF_PROG_TYPE_FLOW_DISSECTOR)
	393	return -EINVAL;
	394
947e8b59 SF	395	if (kattr->test.ctx_in \|\| kattr->test.ctx_out)
	396	return -EINVAL;
	397
b7a1848e SF	398	data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
	399	SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
	400	if (IS_ERR(data))
	401	return PTR_ERR(data);
	402
	403	sk = kzalloc(sizeof(*sk), GFP_USER);
	404	if (!sk) {
	405	kfree(data);
	406	return -ENOMEM;
	407	}
	408	sock_net_set(sk, current->nsproxy->net_ns);
	409	sock_init_data(NULL, sk);
	410
	411	skb = build_skb(data, 0);
	412	if (!skb) {
	413	kfree(data);
	414	kfree(sk);
	415	return -ENOMEM;
	416	}
	417	skb->sk = sk;
	418
	419	skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
	420	__skb_put(skb, size);
	421	skb->protocol = eth_type_trans(skb,
	422	current->nsproxy->net_ns->loopback_dev);
	423	skb_reset_network_header(skb);
	424
b7a1848e SF	425	if (!repeat)
	426	repeat = 1;
	427
a439184d SF	428	rcu_read_lock();
a439184d SF	429	preempt_disable();
b7a1848e SF	430	time_start = ktime_get_ns();
b7a1848e SF	431	for (i = 0; i < repeat; i++) {
b7a1848e SF	432	retval = __skb_flow_bpf_dissect(prog, skb,
	433	&flow_keys_dissector,
	434	&flow_keys);
a439184d SF	435
	436	if (signal_pending(current)) {
	437	preempt_enable();
	438	rcu_read_unlock();
	439
	440	ret = -EINTR;
	441	goto out;
	442	}
b7a1848e SF	443
b7a1848e SF	444	if (need_resched()) {
b7a1848e	445	time_spent += ktime_get_ns() - time_start;
a439184d SF	446	preempt_enable();
	447	rcu_read_unlock();
	448
b7a1848e	449	cond_resched();
a439184d SF	450
	451	rcu_read_lock();
	452	preempt_disable();
b7a1848e SF	453	time_start = ktime_get_ns();
	454	}
	455	}
	456	time_spent += ktime_get_ns() - time_start;
a439184d SF	457	preempt_enable();
	458	rcu_read_unlock();
	459
b7a1848e SF	460	do_div(time_spent, repeat);
	461	duration = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;
	462
	463	ret = bpf_test_finish(kattr, uattr, &flow_keys, sizeof(flow_keys),
	464	retval, duration);
	465
a439184d	466	out:
b7a1848e SF	467	kfree_skb(skb);
	468	kfree(sk);
	469	return ret;
	470	}