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authorJie Wang <wangjie125@huawei.com>2022-04-12 10:01:20 +0800
committerJakub Kicinski <kuba@kernel.org>2022-04-15 11:41:45 -0700
commitbde292c07b480e23137060dad83cca24d55c4cc4 (patch)
tree5106c0fc4f46524cfc3d69f19c991ff4dad3de50 /net/ethtool
parent4dc84c06a343fcb95fd5a0acb537aefa4ebdd1b0 (diff)
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: Jie Wang <wangjie125@huawei.com> Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ethtool')
-rw-r--r--net/ethtool/rings.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 9ed60c507d97..fa3ec8d438f7 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -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)