This is adapted from kvm-userspace. It allows readv to be used with tap when
the host supports it.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6074
c046a42c-6fe2-441c-8c8c-
71466251a162
char down_script[1024];
} TAPState;
char down_script[1024];
} TAPState;
+#ifdef HAVE_IOVEC
+static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
+ int iovcnt)
+{
+ TAPState *s = opaque;
+ ssize_t len;
+
+ do {
+ len = writev(s->fd, iov, iovcnt);
+ } while (len == -1 && (errno == EINTR || errno == EAGAIN));
+
+ return len;
+}
+#endif
+
static void tap_receive(void *opaque, const uint8_t *buf, int size)
{
TAPState *s = opaque;
static void tap_receive(void *opaque, const uint8_t *buf, int size)
{
TAPState *s = opaque;
return NULL;
s->fd = fd;
s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
return NULL;
s->fd = fd;
s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
+#ifdef HAVE_IOVEC
+ s->vc->fd_readv = tap_receive_iov;
+#endif
qemu_set_fd_handler(s->fd, tap_send, NULL, s);
snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd);
return s;
qemu_set_fd_handler(s->fd, tap_send, NULL, s);
snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd);
return s;