[PATCH net-next 8/9] net: drv: virtio: migrate to new RXFH callbacks

Jakub Kicinski
2025-06-11T14:59:58Z

Add support for the new rxfh_fields callbacks, instead of de-muxing
the rxnfc calls. This driver does not support flow filtering so
the set_rxnfc callback is completely removed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: mst@redhat.com
CC: jasowang@redhat.com
CC: xuanzhuo@linux.alibaba.com
CC: eperezma@redhat.com
CC: virtualization@lists.linux.dev
---
drivers/net/virtio_net.c | 47 +++++++++++++++-------------------------
1 file changed, 18 insertions(+), 29 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index e53ba600605a..07e41dce4203 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -4193,8 +4193,11 @@ static void virtnet_init_default_rss(struct virtnet_info *vi)
netdev_rss_key_fill(vi->rss_hash_key_data, vi->rss_key_size);
}

-static void virtnet_get_hashflow(const struct virtnet_info *vi, struct ethtool_rxnfc *info)
+static int virtnet_get_hashflow(struct net_device *dev,
+ struct ethtool_rxfh_fields *info)
{
+ struct virtnet_info *vi = netdev_priv(dev);
+
info->data = 0;
switch (info->flow_type) {
case TCP_V4_FLOW:
@@ -4243,17 +4246,22 @@ static void virtnet_get_hashflow(const struct virtnet_info *vi, struct ethtool_r
info->data = 0;
break;
}
+
+ return 0;
}

-static bool virtnet_set_hashflow(struct virtnet_info *vi, struct ethtool_rxnfc *info)
+static int virtnet_set_hashflow(struct net_device *dev,
+ const struct ethtool_rxfh_fields *info,
+ struct netlink_ext_ack *extack)
{
+ struct virtnet_info *vi = netdev_priv(dev);
u32 new_hashtypes = vi->rss_hash_types_saved;
bool is_disable = info->data & RXH_DISCARD;
bool is_l4 = info->data == (RXH_IP_SRC | RXH_IP_DST | RXH_L4_B_0_1 | RXH_L4_B_2_3);

/* supports only 'sd', 'sdfn' and 'r' */
if (!((info->data == (RXH_IP_SRC | RXH_IP_DST)) | is_l4 | is_disable))
- return false;
+ return -EINVAL;

switch (info->flow_type) {
case TCP_V4_FLOW:
@@ -4292,21 +4300,22 @@ static bool virtnet_set_hashflow(struct virtnet_info *vi, struct ethtool_rxnfc *
break;
default:
/* unsupported flow */
- return false;
+ return -EINVAL;
}

/* if unsupported hashtype was set */
if (new_hashtypes != (new_hashtypes & vi->rss_hash_types_supported))
- return false;
+ return -EINVAL;

if (new_hashtypes != vi->rss_hash_types_saved) {
vi->rss_hash_types_saved = new_hashtypes;
vi->rss_hdr->hash_types = cpu_to_le32(vi->rss_hash_types_saved);
if (vi->dev->features & NETIF_F_RXHASH)
- return virtnet_commit_rss_command(vi);
+ if (!virtnet_commit_rss_command(vi))
+ return -EINVAL;
}

- return true;
+ return 0;
}

static void virtnet_get_drvinfo(struct net_device *dev,
@@ -5539,27 +5548,6 @@ static int virtnet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
switch (info->cmd) {
case ETHTOOL_GRXRINGS:
info->data = vi->curr_queue_pairs;
- break;
- case ETHTOOL_GRXFH:
- virtnet_get_hashflow(vi, info);
- break;
- default:
- rc = -EOPNOTSUPP;
- }
-
- return rc;
-}
-
-static int virtnet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info)
-{
- struct virtnet_info *vi = netdev_priv(dev);
- int rc = 0;
-
- switch (info->cmd) {
- case ETHTOOL_SRXFH:
- if (!virtnet_set_hashflow(vi, info))
- rc = -EINVAL;
-
break;
default:
rc = -EOPNOTSUPP;
@@ -5591,8 +5579,9 @@ static const struct ethtool_ops virtnet_ethtool_ops = {
.get_rxfh_indir_size = virtnet_get_rxfh_indir_size,
.get_rxfh = virtnet_get_rxfh,
.set_rxfh = virtnet_set_rxfh,
+ .get_rxfh_fields = virtnet_get_hashflow,
+ .set_rxfh_fields = virtnet_set_hashflow,
.get_rxnfc = virtnet_get_rxnfc,
- .set_rxnfc = virtnet_set_rxnfc,
};

static void virtnet_get_queue_stats_rx(struct net_device *dev, int i,
--
2.49.0