--- /dev/null
+/* 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>
+
+static __always_inline u32 bpf_test_run_one(struct bpf_prog *prog, void *ctx)
+{
+ u32 ret;
+
+ preempt_disable();
+ rcu_read_lock();
+ ret = BPF_PROG_RUN(prog, ctx);
+ rcu_read_unlock();
+ preempt_enable();
+
+ return ret;
+}
+
+static u32 bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat, u32 *time)
+{
+ u64 time_start, time_spent = 0;
+ u32 ret = 0, i;
+
+ if (!repeat)
+ repeat = 1;
+ time_start = ktime_get_ns();
+ for (i = 0; i < repeat; i++) {
+ ret = bpf_test_run_one(prog, ctx);
+ if (need_resched()) {
+ if (signal_pending(current))
+ break;
+ time_spent += ktime_get_ns() - time_start;
+ cond_resched();
+ time_start = ktime_get_ns();
+ }
+ }
+ time_spent += ktime_get_ns() - time_start;
+ do_div(time_spent, repeat);
+ *time = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;
+
+ return ret;
+}
+
+static int bpf_test_finish(union bpf_attr __user *uattr, const void *data,
+ u32 size, u32 retval, u32 duration)
+{
+ void __user *data_out = u64_to_user_ptr(uattr->test.data_out);
+ int err = -EFAULT;
+
+ if (data_out && copy_to_user(data_out, data, 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;
+ 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;
+}
+
+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;
+ u32 retval, duration;
+ struct sk_buff *skb;
+ void *data;
+ int ret;
+
+ data = bpf_test_init(kattr, size, NET_SKB_PAD,
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ 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;
+ }
+
+ skb = build_skb(data, 0);
+ if (!skb) {
+ kfree(data);
+ return -ENOMEM;
+ }
+
+ skb_reserve(skb, NET_SKB_PAD);
+ __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, ETH_HLEN);
+ if (is_direct_pkt_access)
+ bpf_compute_data_end(skb);
+ retval = bpf_test_run(prog, skb, repeat, &duration);
+ if (!is_l2)
+ __skb_push(skb, ETH_HLEN);
+ 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(uattr, skb->data, size, retval, duration);
+ kfree_skb(skb);
+ 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 xdp_buff xdp = {};
+ u32 retval, duration;
+ void *data;
+ int ret;
+
+ data = bpf_test_init(kattr, size, XDP_PACKET_HEADROOM, 0);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ xdp.data_hard_start = data;
+ xdp.data = data + XDP_PACKET_HEADROOM;
+ xdp.data_end = xdp.data + size;
+
+ retval = bpf_test_run(prog, &xdp, repeat, &duration);
+ if (xdp.data != data + XDP_PACKET_HEADROOM)
+ size = xdp.data_end - xdp.data;
+ ret = bpf_test_finish(uattr, xdp.data, size, retval, duration);
+ kfree(data);
+ return ret;
+}
.is_valid_access = tc_cls_act_is_valid_access,
.convert_ctx_access = tc_cls_act_convert_ctx_access,
.gen_prologue = tc_cls_act_prologue,
+ .test_run = bpf_prog_test_run_skb,
};
static const struct bpf_verifier_ops xdp_ops = {
.get_func_proto = xdp_func_proto,
.is_valid_access = xdp_is_valid_access,
.convert_ctx_access = xdp_convert_ctx_access,
+ .test_run = bpf_prog_test_run_xdp,
};
static const struct bpf_verifier_ops cg_skb_ops = {
.get_func_proto = cg_skb_func_proto,
.is_valid_access = sk_filter_is_valid_access,
.convert_ctx_access = bpf_convert_ctx_access,
+ .test_run = bpf_prog_test_run_skb,
};
static const struct bpf_verifier_ops lwt_inout_ops = {
.get_func_proto = lwt_inout_func_proto,
.is_valid_access = lwt_is_valid_access,
.convert_ctx_access = bpf_convert_ctx_access,
+ .test_run = bpf_prog_test_run_skb,
};
static const struct bpf_verifier_ops lwt_xmit_ops = {
.is_valid_access = lwt_is_valid_access,
.convert_ctx_access = bpf_convert_ctx_access,
.gen_prologue = tc_cls_act_prologue,
+ .test_run = bpf_prog_test_run_skb,
};
static const struct bpf_verifier_ops cg_sock_ops = {
projects / mirror_ubuntu-artful-kernel.git / commitdiff