From: Vladimir Zhigulin <vladimir.jigulin@travelping.com>
Date: Fri, 4 Jul 2025 08:31:44 +0000 (+0200)
Subject: af_xdp: fix missing recvmsg argument
X-Git-Tag: v26.02-rc0~100
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F71%2F43371%2F5;p=vpp.git

af_xdp: fix missing recvmsg argument

Because of missing argument syscall was failing
before reaching xdp system what could result in
degrated performance

Type: fix

Change-Id: I0ae1ce1bacf68457a02a31b3508e9c5100a754e6
Signed-off-by: Vladimir Zhigulin <vladimir.jigulin@travelping.com>
---

diff --git a/src/plugins/af_xdp/input.c b/src/plugins/af_xdp/input.c
index 9177b3ffc5b..72c3738fa2f 100644
--- a/src/plugins/af_xdp/input.c
+++ b/src/plugins/af_xdp/input.c
@@ -88,7 +88,12 @@ af_xdp_device_input_refill_db (vlib_main_t * vm,
 
   if (clib_spinlock_trylock_if_init (&rxq->syscall_lock))
     {
-      int ret = recvmsg (rxq->xsk_fd, 0, MSG_DONTWAIT);
+      struct msghdr msg = { 0 };
+      struct iovec iov = { 0 };
+      msg.msg_iov = &iov;
+      msg.msg_iovlen = 1;
+
+      int ret = recvmsg (rxq->xsk_fd, &msg, MSG_DONTWAIT);
       clib_spinlock_unlock_if_init (&rxq->syscall_lock);
       if (PREDICT_FALSE (ret < 0))
 	{