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Code Issues Releases Wiki Activity

virtio_net: reject unsupported coalescing params

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Set ethtool_ops->supported_coalesce_params to let
the core reject unsupported coalescing parameters.

This driver correctly rejects all unsupported parameters.
As a side effect of these changes the error code for
unsupported params changes from EINVAL to EOPNOTSUPP.

v2: correctly handle rx-frames (and adjust the commit msg)
v3: adjust commit message for new error code and member name

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2020-03-04 21:15:42 -08:00 committed by David S. Miller
parent f9f12f57e2
commit a51e520653
1 changed files with 3 additions and 11 deletions
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14
drivers/net/virtio_net.c
View file

@ -2202,23 +2202,14 @@ static int virtnet_get_link_ksettings(struct net_device *dev,
static int virtnet_set_coalesce(struct net_device *dev,
struct ethtool_coalesce *ec)
{
struct ethtool_coalesce ec_default = {
.cmd = ETHTOOL_SCOALESCE,
.rx_max_coalesced_frames = 1,
};
struct virtnet_info *vi = netdev_priv(dev);
int i, napi_weight;
if (ec->tx_max_coalesced_frames > 1)
if (ec->tx_max_coalesced_frames > 1 ||
ec->rx_max_coalesced_frames != 1)
return -EINVAL;
ec_default.tx_max_coalesced_frames = ec->tx_max_coalesced_frames;
napi_weight = ec->tx_max_coalesced_frames ? NAPI_POLL_WEIGHT : 0;
/* disallow changes to fields not explicitly tested above */
if (memcmp(ec, &ec_default, sizeof(ec_default)))
return -EINVAL;
if (napi_weight ^ vi->sq[0].napi.weight) {
if (dev->flags & IFF_UP)
return -EBUSY;
@ -2273,6 +2264,7 @@ static void virtnet_update_settings(struct virtnet_info *vi)
}
static const struct ethtool_ops virtnet_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_MAX_FRAMES,
.get_drvinfo = virtnet_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_ringparam = virtnet_get_ringparam,