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tools lib bpf: Add bpf_prog_{attach,detach}
[mirror_ubuntu-artful-kernel.git] / samples / bpf / libbpf.c
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1/* eBPF mini library */
2#include <stdlib.h>
3#include <stdio.h>
4#include <linux/unistd.h>
5#include <unistd.h>
6#include <string.h>
3c731eba 7#include <errno.h>
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8#include <net/ethernet.h>
9#include <net/if.h>
10#include <linux/if_packet.h>
11#include <arpa/inet.h>
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12#include "libbpf.h"
13
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14int open_raw_sock(const char *name)
15{
16 struct sockaddr_ll sll;
17 int sock;
18
19 sock = socket(PF_PACKET, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, htons(ETH_P_ALL));
20 if (sock < 0) {
21 printf("cannot create raw socket\n");
22 return -1;
23 }
24
25 memset(&sll, 0, sizeof(sll));
26 sll.sll_family = AF_PACKET;
27 sll.sll_ifindex = if_nametoindex(name);
28 sll.sll_protocol = htons(ETH_P_ALL);
29 if (bind(sock, (struct sockaddr *)&sll, sizeof(sll)) < 0) {
30 printf("bind to %s: %s\n", name, strerror(errno));
31 close(sock);
32 return -1;
33 }
34
35 return sock;
36}
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37
38int perf_event_open(struct perf_event_attr *attr, int pid, int cpu,
39 int group_fd, unsigned long flags)
40{
41 return syscall(__NR_perf_event_open, attr, pid, cpu,
42 group_fd, flags);
43}