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    Subject[PATCH v2 2/2] tools/virtio: Add hints when module is not installed
    Date
    From: Liming Wu <liming.wu@jaguarmicro.com>

    Need to insmod vhost_test.ko before run virtio_test.
    Give some hints to users.

    Signed-off-by: Liming Wu <liming.wu@jaguarmicro.com>
    ---
    tools/virtio/virtio_test.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
    index 028f54e6854a..13572a677c35 100644
    --- a/tools/virtio/virtio_test.c
    +++ b/tools/virtio/virtio_test.c
    @@ -135,6 +135,10 @@ static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
    dev->buf = malloc(dev->buf_size);
    assert(dev->buf);
    dev->control = open("/dev/vhost-test", O_RDWR);
    +
    + if (dev->control < 0)
    + fprintf(stderr,
    + "Install vhost_test module (./vhost_test/vhost_test.ko) first.\n");
    assert(dev->control >= 0);
    r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
    assert(r >= 0);
    --
    2.34.1
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