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[for-next,v2,10/12] RDMA/rxe: Make rxe_loopback match rxe_send behavior

Message ID 20240327155157.590886-12-rpearsonhpe@gmail.com (mailing list archive)
State Superseded
Headers show
Series RDMA/rxe: Various fixes and cleanups | expand

Commit Message

Bob Pearson March 27, 2024, 3:51 p.m. UTC 
The rxe send path currently counts the number of skbs outstanding
between the rxe driver and the ethernet driver to prevent too many
packets to accumulate waiting to send. This patch makes the local
loopback path behave the same way. The loopback path forwards the
packets to the receive path which will eventually call kfree_skb
on all packets and drop the qp references. This makes the loopback
path more useful for software testing.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
 drivers/infiniband/sw/rxe/rxe_net.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c
index d81440038f91..d081409450a4 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -386,6 +386,12 @@  static int rxe_loopback(struct sk_buff *skb, struct rxe_pkt_info *pkt)
 {
 	memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 
+	skb->destructor = rxe_skb_tx_dtor;
+	skb->sk = pkt->qp->sk->sk;
+
+	rxe_get(pkt->qp);
+	atomic_inc(&pkt->qp->skb_out);
+
 	if (skb->protocol == htons(ETH_P_IP))
 		skb_pull(skb, sizeof(struct iphdr));
 	else