[PATCH 1/2] hw/net/net_tx_pkt: add function to check pkt->max_raw_frags

[Mauro Matteo Cascella <mcascell@redhat.com>]

This patch introduces a new function in hw/net/net_tx_pkt.{c,h} to check the
current data fragment against the maximum number of data fragments.

Reported-by: Ziming Zhang <ezrakiez@gmail.com>
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
---
 hw/net/net_tx_pkt.c | 5 +++++
 hw/net/net_tx_pkt.h | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c
index 9560e4a49e..d035618f2c 100644
--- a/hw/net/net_tx_pkt.c
+++ b/hw/net/net_tx_pkt.c
@@ -400,6 +400,11 @@ bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt, hwaddr pa,
     }
 }
 
+bool net_tx_pkt_exceed_max_fragments(struct NetTxPkt *pkt)
+{
+    return pkt->raw_frags >= pkt->max_raw_frags;
+}
+
 bool net_tx_pkt_has_fragments(struct NetTxPkt *pkt)
 {
     return pkt->raw_frags > 0;
diff --git a/hw/net/net_tx_pkt.h b/hw/net/net_tx_pkt.h
index 4ec8bbe9bd..e2ee46ae03 100644
--- a/hw/net/net_tx_pkt.h
+++ b/hw/net/net_tx_pkt.h
@@ -179,6 +179,14 @@ bool net_tx_pkt_send_loopback(struct NetTxPkt *pkt, NetClientState *nc);
  */
 bool net_tx_pkt_parse(struct NetTxPkt *pkt);
 
+/**
+* indicates if the current data fragment exceeds max_raw_frags
+*
+* @pkt:            packet
+*
+*/
+bool net_tx_pkt_exceed_max_fragments(struct NetTxPkt *pkt);
+
 /**
 * indicates if there are data fragments held by this packet object.
 *
-- 
2.26.2