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bpf: fix rlimit in reuseport net selftest

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Fix two issues in the reuseport_bpf selftests that were
reported by Linaro CI:

  [...]
  + ./reuseport_bpf
  ---- IPv4 UDP ----
  Testing EBPF mod 10...
  Reprograming, testing mod 5...
  ./reuseport_bpf: ebpf error. log:
  0: (bf) r6 = r1
  1: (20) r0 = *(u32 *)skb[0]
  2: (97) r0 %= 10
  3: (95) exit
  processed 4 insns
  : Operation not permitted
  + echo FAIL
  [...]
  ---- IPv4 TCP ----
  Testing EBPF mod 10...
  ./reuseport_bpf: failed to bind send socket: Address already in use
  + echo FAIL
  [...]

For the former adjust rlimit since this was the cause of
failure for loading the BPF prog, and for the latter add
SO_REUSEADDR.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Link: https://bugs.linaro.org/show_bug.cgi?id=3502
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2018-02-09 14:49:44 +01:00 committed by David S. Miller
parent 07f2c7ab6f
commit 941ff6f11c
1 changed files with 20 additions and 1 deletions
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21
tools/testing/selftests/net/reuseport_bpf.c
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@ -21,6 +21,7 @@
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/resource.h>
#include <unistd.h>
#ifndef ARRAY_SIZE
@ -190,11 +191,14 @@ static void send_from(struct test_params p, uint16_t sport, char *buf,
struct sockaddr * const saddr = new_any_sockaddr(p.send_family, sport);
struct sockaddr * const daddr =
new_loopback_sockaddr(p.send_family, p.recv_port);
const int fd = socket(p.send_family, p.protocol, 0);
const int fd = socket(p.send_family, p.protocol, 0), one = 1;
if (fd < 0)
error(1, errno, "failed to create send socket");
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
error(1, errno, "failed to set reuseaddr");
if (bind(fd, saddr, sockaddr_size()))
error(1, errno, "failed to bind send socket");
@ -433,6 +437,21 @@ void enable_fastopen(void)
}
}
static struct rlimit rlim_old, rlim_new;
static __attribute__((constructor)) void main_ctor(void)
{
getrlimit(RLIMIT_MEMLOCK, &rlim_old);
rlim_new.rlim_cur = rlim_old.rlim_cur + (1UL << 20);
rlim_new.rlim_max = rlim_old.rlim_max + (1UL << 20);
setrlimit(RLIMIT_MEMLOCK, &rlim_new);
}
static __attribute__((destructor)) void main_dtor(void)
{
setrlimit(RLIMIT_MEMLOCK, &rlim_old);
}
int main(void)
{
fprintf(stderr, "---- IPv4 UDP ----\n");