Re: [Qemu-devel] [PATCH 2/2] tests: test rx recovery from cont

[Jason Wang]

On 07/08/2015 11:22 AM, Fam Zheng wrote:
> On Tue, 07/07 18:58, Jason Wang wrote:
>> Rx should be recovered after cont.
>>
>> Signed-off-by: Jason Wang <address@hidden>
>> ---
>>  tests/virtio-net-test.c | 48 
>> ++++++++++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 48 insertions(+)
>>
>> diff --git a/tests/virtio-net-test.c b/tests/virtio-net-test.c
>> index 97aa442..aeae80c 100644
>> --- a/tests/virtio-net-test.c
>> +++ b/tests/virtio-net-test.c
>> @@ -138,6 +138,45 @@ static void tx_test(const QVirtioBus *bus, 
>> QVirtioDevice *dev,
>>      g_assert_cmpstr(buffer, ==, "TEST");
>>  }
>>  
>> +static void rx_stop_cont_test(const QVirtioBus *bus, QVirtioDevice *dev,
>> +                              QGuestAllocator *alloc, QVirtQueue *vq,
>> +                              int socket)
>> +{
>> +    uint64_t req_addr;
>> +    uint32_t free_head;
>> +    char test[] = "TEST";
>> +    char buffer[64];
>> +    int len = htonl(sizeof(test));
>> +    struct iovec iov[] = {
>> +        {
>> +            .iov_base = &len,
>> +            .iov_len = sizeof(len),
>> +        }, {
>> +            .iov_base = test,
>> +            .iov_len = sizeof(test),
>> +        },
>> +    };
>> +    int ret;
>> +
>> +    req_addr = guest_alloc(alloc, 64);
>> +
>> +    free_head = qvirtqueue_add(vq, req_addr, 64, true, false);
>> +    qvirtqueue_kick(bus, dev, vq, free_head);
>> +
>> +    qmp("{ 'execute' : 'stop'}");
>> +
>> +    ret = iov_send(socket, iov, 2, 0, sizeof(len) + sizeof(test));
>> +    g_assert_cmpint(ret, ==, sizeof(test) + sizeof(len));
> Maybe add a small lag here? The next "cont" could be too early that is noticed
> earlier than the packet.

I'm not sure I get the point of this. But at any case, rx should be
recovered. (Btw, current qemu.git will fail in this case).

>
>> +
>> +    qmp("{ 'execute' : 'cont'}");
>> +
>> +    qvirtio_wait_queue_isr(bus, dev, vq, QVIRTIO_NET_TIMEOUT_US);
>> +    memread(req_addr + 12, buffer, sizeof(test));
>> +    g_assert_cmpstr(buffer, ==, "TEST");
>> +
>> +    guest_free(alloc, req_addr);
>> +}
>> +
>>  static void send_recv_test(const QVirtioBus *bus, QVirtioDevice *dev,
>>                             QGuestAllocator *alloc, QVirtQueue *rvq,
>>                             QVirtQueue *tvq, int socket)
>> @@ -146,6 +185,13 @@ static void send_recv_test(const QVirtioBus *bus, 
>> QVirtioDevice *dev,
>>      tx_test(bus, dev, alloc, tvq, socket);
>>  }
>>  
>> +static void stop_cont_test(const QVirtioBus *bus, QVirtioDevice *dev,
>> +                           QGuestAllocator *alloc, QVirtQueue *rvq,
>> +                           QVirtQueue *tvq, int socket)
>> +{
>> +    rx_stop_cont_test(bus, dev, alloc, rvq, socket);
>> +}
>> +
>>  static void pci_basic(gconstpointer data)
>>  {
>>      QVirtioPCIDevice *dev;
>> @@ -204,6 +250,8 @@ int main(int argc, char **argv)
>>      g_test_init(&argc, &argv, NULL);
>>  #ifndef _WIN32
>>      qtest_add_data_func("/virtio/net/pci/basic", send_recv_test, pci_basic);
>> +    qtest_add_data_func("/virtio/net/pci/rx_stop_cont",
>> +                        stop_cont_test, pci_basic);
>>  #endif
>>      qtest_add_func("/virtio/net/pci/hotplug", hotplug);
>>  
>> -- 
>> 2.1.4
>>