Commit bde292c0 authored by Jie Wang's avatar Jie Wang Committed by Jakub Kicinski

net: ethtool: move checks before rtnl_lock() in ethnl_set_rings

Currently these two checks in ethnl_set_rings are added after rtnl_lock()
which will do useless works if the request is invalid.

So this patch moves these checks before the rtnl_lock() to avoid these
costs.
Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 4dc84c06
......@@ -152,6 +152,24 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
if (!ops->get_ringparam || !ops->set_ringparam)
goto out_dev;
if (tb[ETHTOOL_A_RINGS_RX_BUF_LEN] &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
ret = -EOPNOTSUPP;
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
"setting rx buf len not supported");
goto out_dev;
}
if (tb[ETHTOOL_A_RINGS_CQE_SIZE] &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
ret = -EOPNOTSUPP;
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_RINGS_CQE_SIZE],
"setting cqe size not supported");
goto out_dev;
}
if (tb[ETHTOOL_A_RINGS_TX_PUSH] &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_TX_PUSH)) {
ret = -EOPNOTSUPP;
......@@ -201,24 +219,6 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
goto out_ops;
}
if (kernel_ringparam.rx_buf_len != 0 &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_RX_BUF_LEN)) {
ret = -EOPNOTSUPP;
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_RINGS_RX_BUF_LEN],
"setting rx buf len not supported");
goto out_ops;
}
if (kernel_ringparam.cqe_size &&
!(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
ret = -EOPNOTSUPP;
NL_SET_ERR_MSG_ATTR(info->extack,
tb[ETHTOOL_A_RINGS_CQE_SIZE],
"setting cqe size not supported");
goto out_ops;
}
ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
&kernel_ringparam, info->extack);
if (ret < 0)
......
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