[Qemu-devel] [PATCH 06/12] netfilter: provide a compat receive_iov

[Yang Hongyang <yanghy@cn.fujitsu.com>]

if a filter do not provide a receive_iov, use a compat
receive_iov instead.

Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
---
 net/filter.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/net/filter.c b/net/filter.c
index 3d3b7bc..50fb837 100644
--- a/net/filter.c
+++ b/net/filter.c
@@ -14,12 +14,27 @@
 #include "qapi/dealloc-visitor.h"
 #include "qemu/config-file.h"
 #include "qmp-commands.h"
+#include "qemu/iov.h"
 
 #include "net/filter.h"
 #include "net/net.h"
 
 static QTAILQ_HEAD(, NetFilterState) net_filters;
 
+static ssize_t filter_receive_iov_compat(NetFilterState *nf,
+                                         NetClientState *sender,
+                                         unsigned flags,
+                                         const struct iovec *iov,
+                                         int iovcnt)
+{
+    uint8_t buffer[NET_BUFSIZE];
+    size_t offset;
+
+    offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
+
+    return nf->info->receive(nf, sender, flags, buffer, offset);
+}
+
 NetFilterState *qemu_new_net_filter(NetFilterInfo *info,
                                     NetClientState *netdev,
                                     const char *model,
@@ -34,6 +49,9 @@ NetFilterState *qemu_new_net_filter(NetFilterInfo *info,
     nf->model = g_strdup(model);
     nf->name = g_strdup(name);
     nf->netdev = netdev;
+    if (!nf->info->receive_iov) {
+        nf->info->receive_iov = filter_receive_iov_compat;
+    }
     QTAILQ_INSERT_TAIL(&net_filters, nf, next);
     qemu_netdev_add_filter(netdev, nf);
 
-- 
1.9.1