[Qemu-devel] [PATCH RFC 3/7] net/filter: Skip the disabled filter when delivering packets

[zhanghailiang <zhang.zhanghailiang@huawei.com>]

If the filter is disabled, don't go through it.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
---
 include/net/filter.h | 5 +++++
 net/net.c            | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/include/net/filter.h b/include/net/filter.h
index 9ed5ec6..d797ee4 100644
--- a/include/net/filter.h
+++ b/include/net/filter.h
@@ -74,6 +74,11 @@ ssize_t qemu_netfilter_pass_to_next(NetClientState *sender,
                                     int iovcnt,
                                     void *opaque);
 
+static inline bool qemu_need_skip_netfilter(NetFilterState *nf)
+{
+    return nf->enabled ? false : true;
+}
+
 void netfilter_print_info(NetFilterState *nf, char *output_str, int size);
 
 #endif /* QEMU_NET_FILTER_H */
diff --git a/net/net.c b/net/net.c
index 87de7c0..ec43105 100644
--- a/net/net.c
+++ b/net/net.c
@@ -581,6 +581,10 @@ static ssize_t filter_receive_iov(NetClientState *nc,
     NetFilterState *nf = NULL;
 
     QTAILQ_FOREACH(nf, &nc->filters, next) {
+        /* Don't go through filter if it is off */
+        if (qemu_need_skip_netfilter(nf)) {
+            continue;
+        }
         ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
                                      iovcnt, sent_cb);
         if (ret) {
-- 
1.8.3.1