[PATCH 03/12] vhost-net: improve TSO and checksum TODO comments

From: xiongweimin <[email protected]>

Update TODO comments related to TSO (TCP Segmentation Offload) and
checksum handling to clearly document the current limitations and
what's needed for future implementation.

Signed-off-by: Weimin Xiong <[email protected]>
Co-authored-by: Cursor <[email protected]>
---
 drivers/vhost/net.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 77b59f49b..c6854cba5 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -644,7 +644,7 @@ static bool vhost_exceeds_maxpend(struct vhost_net *net)
 static size_t init_iov_iter(struct vhost_virtqueue *vq, struct iov_iter *iter,
 			    size_t hdr_size, int out)
 {
-	/* Skip header. TODO: support TSO. */
+	/* Skip header. TSO support requires parsing virtio_net_hdr gso_type */
 	size_t len = iov_length(vq->iov, out);
 
 	iov_iter_init(iter, ITER_SOURCE, vq->iov, out, len);
@@ -1240,8 +1240,8 @@ static void handle_rx(struct vhost_net *net)
 		iov_iter_init(&msg.msg_iter, ITER_DEST, vq->iov, in, vhost_len);
 		fixup = msg.msg_iter;
 		if (unlikely((vhost_hlen))) {
-			/* We will supply the header ourselves
-			 * TODO: support TSO.
+			/* We will supply the header ourselves.
+			 * Note: TSO requires handling gso_size/gso_type in virtio_net_hdr.
 			 */
 			iov_iter_advance(&msg.msg_iter, vhost_hlen);
 		}
@@ -1270,7 +1270,7 @@ static void handle_rx(struct vhost_net *net)
 			 */
 			iov_iter_advance(&fixup, sizeof(hdr));
 		}
-		/* TODO: Should check and handle checksum. */
+		/* Note: Checksum offload handling not yet implemented */
 
 		num_buffers = cpu_to_vhost16(vq, headcount);
 		if (likely(set_num_buffers) &&
-- 
2.43.0