diff options
Diffstat (limited to 'net/ethtool/rings.c')
| -rw-r--r-- | net/ethtool/rings.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c new file mode 100644 index 000000000..4e097812a --- /dev/null +++ b/net/ethtool/rings.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" + +struct rings_req_info { + struct ethnl_req_info base; +}; + +struct rings_reply_data { + struct ethnl_reply_data base; + struct ethtool_ringparam ringparam; +}; + +#define RINGS_REPDATA(__reply_base) \ + container_of(__reply_base, struct rings_reply_data, base) + +const struct nla_policy ethnl_rings_get_policy[] = { + [ETHTOOL_A_RINGS_HEADER] = + NLA_POLICY_NESTED(ethnl_header_policy), +}; + +static int rings_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct rings_reply_data *data = RINGS_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + if (!dev->ethtool_ops->get_ringparam) + return -EOPNOTSUPP; + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + dev->ethtool_ops->get_ringparam(dev, &data->ringparam); + ethnl_ops_complete(dev); + + return 0; +} + +static int rings_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */ + nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */ + nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */ + nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */ + nla_total_size(sizeof(u32)) + /* _RINGS_RX */ + nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */ + nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */ + nla_total_size(sizeof(u32)); /* _RINGS_TX */ +} + +static int rings_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct rings_reply_data *data = RINGS_REPDATA(reply_base); + const struct ethtool_ringparam *ringparam = &data->ringparam; + + if ((ringparam->rx_max_pending && + (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX, + ringparam->rx_max_pending) || + nla_put_u32(skb, ETHTOOL_A_RINGS_RX, + ringparam->rx_pending))) || + (ringparam->rx_mini_max_pending && + (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX, + ringparam->rx_mini_max_pending) || + nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI, + ringparam->rx_mini_pending))) || + (ringparam->rx_jumbo_max_pending && + (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX, + ringparam->rx_jumbo_max_pending) || + nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO, + ringparam->rx_jumbo_pending))) || + (ringparam->tx_max_pending && + (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX, + ringparam->tx_max_pending) || + nla_put_u32(skb, ETHTOOL_A_RINGS_TX, + ringparam->tx_pending)))) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_rings_request_ops = { + .request_cmd = ETHTOOL_MSG_RINGS_GET, + .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY, + .hdr_attr = ETHTOOL_A_RINGS_HEADER, + .req_info_size = sizeof(struct rings_req_info), + .reply_data_size = sizeof(struct rings_reply_data), + + .prepare_data = rings_prepare_data, + .reply_size = rings_reply_size, + .fill_reply = rings_fill_reply, +}; + +/* RINGS_SET */ + +const struct nla_policy ethnl_rings_set_policy[] = { + [ETHTOOL_A_RINGS_HEADER] = + NLA_POLICY_NESTED(ethnl_header_policy), + [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 }, + [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 }, + [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 }, + [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 }, +}; + +int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info) +{ + struct ethtool_ringparam ringparam = {}; + struct ethnl_req_info req_info = {}; + struct nlattr **tb = info->attrs; + const struct nlattr *err_attr; + const struct ethtool_ops *ops; + struct net_device *dev; + bool mod = false; + int ret; + + ret = ethnl_parse_header_dev_get(&req_info, + tb[ETHTOOL_A_RINGS_HEADER], + genl_info_net(info), info->extack, + true); + if (ret < 0) + return ret; + dev = req_info.dev; + ops = dev->ethtool_ops; + ret = -EOPNOTSUPP; + if (!ops->get_ringparam || !ops->set_ringparam) + goto out_dev; + + rtnl_lock(); + ret = ethnl_ops_begin(dev); + if (ret < 0) + goto out_rtnl; + ops->get_ringparam(dev, &ringparam); + + ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod); + ethnl_update_u32(&ringparam.rx_mini_pending, + tb[ETHTOOL_A_RINGS_RX_MINI], &mod); + ethnl_update_u32(&ringparam.rx_jumbo_pending, + tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod); + ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod); + ret = 0; + if (!mod) + goto out_ops; + + /* ensure new ring parameters are within limits */ + if (ringparam.rx_pending > ringparam.rx_max_pending) + err_attr = tb[ETHTOOL_A_RINGS_RX]; + else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending) + err_attr = tb[ETHTOOL_A_RINGS_RX_MINI]; + else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending) + err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO]; + else if (ringparam.tx_pending > ringparam.tx_max_pending) + err_attr = tb[ETHTOOL_A_RINGS_TX]; + else + err_attr = NULL; + if (err_attr) { + ret = -EINVAL; + NL_SET_ERR_MSG_ATTR(info->extack, err_attr, + "requested ring size exceeds maximum"); + goto out_ops; + } + + ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); + if (ret < 0) + goto out_ops; + ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); + +out_ops: + ethnl_ops_complete(dev); +out_rtnl: + rtnl_unlock(); +out_dev: + dev_put(dev); + return ret; +} |