[PATCH V3 04/20] net: introduce qemu_find_net_clients_except()

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In multiqueue, all NetClientState that belongs to the same netdev or nic has the
same id. So this patches introduces an helper qemu_find_net_clients_except()
which finds all NetClientState with the same id. This will be used by multiqueue
networking.

Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
 include/net/net.h |    2 ++
 net/net.c         |   21 +++++++++++++++++++++
 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/include/net/net.h b/include/net/net.h
index f0d1aa2..995df5c 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -68,6 +68,8 @@ typedef struct NICState {
 } NICState;
 
 NetClientState *qemu_find_netdev(const char *id);
+int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
+                                 NetClientOptionsKind type, int max);
 NetClientState *qemu_new_net_client(NetClientInfo *info,
                                     NetClientState *peer,
                                     const char *model,
diff --git a/net/net.c b/net/net.c
index 8999f8d..6457fc0 100644
--- a/net/net.c
+++ b/net/net.c
@@ -508,6 +508,27 @@ NetClientState *qemu_find_netdev(const char *id)
     return NULL;
 }
 
+int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
+                                 NetClientOptionsKind type, int max)
+{
+    NetClientState *nc;
+    int ret = 0;
+
+    QTAILQ_FOREACH(nc, &net_clients, next) {
+        if (nc->info->type == type) {
+            continue;
+        }
+        if (!strcmp(nc->name, id)) {
+            if (ret < max) {
+                ncs[ret] = nc;
+            }
+            ret++;
+        }
+    }
+
+    return ret;
+}
+
 static int nic_get_free_idx(void)
 {
     int index;
-- 
1.7.1

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