kni: fix vhost build with kernels 4.2 and 4.4

Fix vhost-kni compile errors because of Linux kernel API changes

- SOCK_ASYNC_WAITDATA renamed to SOCKWQ_ASYNC_WAITDATA
  Linux commit id: 9cd3e072
  Updated in Linux kernel 4.4

- sk_alloc() gets new parameter
  Linux commit id: 11aa9c28b
  Updated in Linux kernel 4.2
  New parameter is: "@kern: is this to be a kernel socket?"

Reported-by: Chintu Hetam <rometoroam@gmail.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_eal/linuxapp/kni/kni_vhost.c b/lib/librte_eal/linuxapp/kni/kni_vhost.c
index 6f2a961..a3ca849 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/kni_vhost.c
+++ b/lib/librte_eal/linuxapp/kni/kni_vhost.c
@@ -251,7 +251,11 @@ kni_sock_poll(struct file *file, struct socket *sock, poll_table * wait)
                mask |= POLLIN | POLLRDNORM;
 
        if (sock_writeable(&q->sk) ||
+#ifdef SOCKWQ_ASYNC_NOSPACE
+           (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &q->sock->flags) &&
+#else
            (!test_and_set_bit(SOCK_ASYNC_NOSPACE, &q->sock->flags) &&
+#endif
             sock_writeable(&q->sk)))
                mask |= POLLOUT | POLLWRNORM;
 
@@ -619,8 +623,11 @@ kni_sk_write_space(struct sock *sk)
        wait_queue_head_t *wqueue;
 
        if (!sock_writeable(sk) ||
-           !test_and_clear_bit(SOCK_ASYNC_NOSPACE,
-                               &sk->sk_socket->flags))
+#ifdef SOCKWQ_ASYNC_NOSPACE
+           !test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &sk->sk_socket->flags))
+#else
+           !test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags))
+#endif
                return;
        wqueue = sk_sleep(sk);
        if (wqueue && waitqueue_active(wqueue))
@@ -666,8 +673,14 @@ kni_vhost_backend_init(struct kni_dev *kni)
        if (kni->vhost_queue != NULL)
                return -1;
 
-       if (!(q = (struct kni_vhost_queue *)sk_alloc(
-                     net, AF_UNSPEC, GFP_KERNEL, &kni_raw_proto)))
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
+       q = (struct kni_vhost_queue *)sk_alloc(net, AF_UNSPEC, GFP_KERNEL,
+                       &kni_raw_proto, 0);
+#else
+       q = (struct kni_vhost_queue *)sk_alloc(net, AF_UNSPEC, GFP_KERNEL,
+                       &kni_raw_proto);
+#endif
+       if (!q)
                return -ENOMEM;
 
        err = sock_create_lite(AF_UNSPEC, SOCK_RAW, IPPROTO_RAW, &q->sock);