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