queue-5.1/selftests-tls-test-for-lowat-overshoot-with-multiple-records.patch

   1 From foo@baz Fri 31 May 2019 03:16:39 PM PDT
   2 From: Jakub Kicinski <jakub.kicinski@netronome.com>
   3 Date: Fri, 24 May 2019 10:34:31 -0700
   4 Subject: selftests/tls: test for lowat overshoot with multiple records
   5
   6 From: Jakub Kicinski <jakub.kicinski@netronome.com>
   7
   8 [ Upstream commit 7718a855cd7ae9fc27a2aa1532ee105d52eb7634 ]
   9
  10 Set SO_RCVLOWAT and test it gets respected when gathering
  11 data from multiple records.
  12
  13 Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
  14 Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
  15 Signed-off-by: David S. Miller <davem@davemloft.net>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17 ---
  18  tools/testing/selftests/net/tls.c |   19 +++++++++++++++++++
  19  1 file changed, 19 insertions(+)
  20
  21 --- a/tools/testing/selftests/net/tls.c
  22 +++ b/tools/testing/selftests/net/tls.c
  23 @@ -575,6 +575,25 @@ TEST_F(tls, recv_peek_large_buf_mult_rec
  24         EXPECT_EQ(memcmp(test_str, buf, len), 0);
  25  }
  26
  27 +TEST_F(tls, recv_lowat)
  28 +{
  29 +       char send_mem[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
  30 +       char recv_mem[20];
  31 +       int lowat = 8;
  32 +
  33 +       EXPECT_EQ(send(self->fd, send_mem, 10, 0), 10);
  34 +       EXPECT_EQ(send(self->fd, send_mem, 5, 0), 5);
  35 +
  36 +       memset(recv_mem, 0, 20);
  37 +       EXPECT_EQ(setsockopt(self->cfd, SOL_SOCKET, SO_RCVLOWAT,
  38 +                            &lowat, sizeof(lowat)), 0);
  39 +       EXPECT_EQ(recv(self->cfd, recv_mem, 1, MSG_WAITALL), 1);
  40 +       EXPECT_EQ(recv(self->cfd, recv_mem + 1, 6, MSG_WAITALL), 6);
  41 +       EXPECT_EQ(recv(self->cfd, recv_mem + 7, 10, 0), 8);
  42 +
  43 +       EXPECT_EQ(memcmp(send_mem, recv_mem, 10), 0);
  44 +       EXPECT_EQ(memcmp(send_mem, recv_mem + 10, 5), 0);
  45 +}
  46
  47  TEST_F(tls, pollin)
  48  {