test_run.c (6b16f5d12202a23d875915349cc031c07fe1b3ec) test_run.c (6e6fddc78323533be570873abb728b7e0ba7e024)
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>

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91
92int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
93 union bpf_attr __user *uattr)
94{
95 bool is_l2 = false, is_direct_pkt_access = false;
96 u32 size = kattr->test.data_size_in;
97 u32 repeat = kattr->test.repeat;
98 u32 retval, duration;
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>

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91
92int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
93 union bpf_attr __user *uattr)
94{
95 bool is_l2 = false, is_direct_pkt_access = false;
96 u32 size = kattr->test.data_size_in;
97 u32 repeat = kattr->test.repeat;
98 u32 retval, duration;
99 int hh_len = ETH_HLEN;
99 struct sk_buff *skb;
100 void *data;
101 int ret;
102
103 data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
104 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
105 if (IS_ERR(data))
106 return PTR_ERR(data);

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126 }
127
128 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
129 __skb_put(skb, size);
130 skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev);
131 skb_reset_network_header(skb);
132
133 if (is_l2)
100 struct sk_buff *skb;
101 void *data;
102 int ret;
103
104 data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
105 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
106 if (IS_ERR(data))
107 return PTR_ERR(data);

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127 }
128
129 skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
130 __skb_put(skb, size);
131 skb->protocol = eth_type_trans(skb, current->nsproxy->net_ns->loopback_dev);
132 skb_reset_network_header(skb);
133
134 if (is_l2)
134 __skb_push(skb, ETH_HLEN);
135 __skb_push(skb, hh_len);
135 if (is_direct_pkt_access)
136 bpf_compute_data_pointers(skb);
137 retval = bpf_test_run(prog, skb, repeat, &duration);
136 if (is_direct_pkt_access)
137 bpf_compute_data_pointers(skb);
138 retval = bpf_test_run(prog, skb, repeat, &duration);
138 if (!is_l2)
139 __skb_push(skb, ETH_HLEN);
139 if (!is_l2) {
140 if (skb_headroom(skb) < hh_len) {
141 int nhead = HH_DATA_ALIGN(hh_len - skb_headroom(skb));
142
143 if (pskb_expand_head(skb, nhead, 0, GFP_USER)) {
144 kfree_skb(skb);
145 return -ENOMEM;
146 }
147 }
148 memset(__skb_push(skb, hh_len), 0, hh_len);
149 }
150
140 size = skb->len;
141 /* bpf program can never convert linear skb to non-linear */
142 if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
143 size = skb_headlen(skb);
144 ret = bpf_test_finish(kattr, uattr, skb->data, size, retval, duration);
145 kfree_skb(skb);
146 return ret;
147}

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152 /* bpf program can never convert linear skb to non-linear */
153 if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
154 size = skb_headlen(skb);
155 ret = bpf_test_finish(kattr, uattr, skb->data, size, retval, duration);
156 kfree_skb(skb);
157 return ret;
158}

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