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34ac17ecbf
It seems I missed that most ethnl_parse_header_dev_get() callers
declare an on-stack struct ethnl_req_info, and that they simply call
dev_put(req_info.dev) when about to return.
Add ethnl_parse_header_dev_put() helper to properly untrack
reference taken by ethnl_parse_header_dev_get().
Fixes: e4b8954074 ("netlink: add net device refcount tracker to struct ethnl_req_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
434 lines
9.6 KiB
C
434 lines
9.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/phy.h>
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#include <linux/ethtool_netlink.h>
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#include "netlink.h"
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#include "common.h"
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/* 802.3 standard allows 100 meters for BaseT cables. However longer
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* cables might work, depending on the quality of the cables and the
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* PHY. So allow testing for up to 150 meters.
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*/
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#define MAX_CABLE_LENGTH_CM (150 * 100)
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const struct nla_policy ethnl_cable_test_act_policy[] = {
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[ETHTOOL_A_CABLE_TEST_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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};
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static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
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{
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struct sk_buff *skb;
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int err = -ENOMEM;
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void *ehdr;
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skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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if (!skb)
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goto out;
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ehdr = ethnl_bcastmsg_put(skb, cmd);
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if (!ehdr) {
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err = -EMSGSIZE;
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goto out;
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}
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err = ethnl_fill_reply_header(skb, phydev->attached_dev,
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ETHTOOL_A_CABLE_TEST_NTF_HEADER);
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if (err)
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goto out;
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err = nla_put_u8(skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
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ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED);
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if (err)
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goto out;
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genlmsg_end(skb, ehdr);
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return ethnl_multicast(skb, phydev->attached_dev);
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out:
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nlmsg_free(skb);
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phydev_err(phydev, "%s: Error %pe\n", __func__, ERR_PTR(err));
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return err;
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}
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int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
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{
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struct ethnl_req_info req_info = {};
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const struct ethtool_phy_ops *ops;
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struct nlattr **tb = info->attrs;
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struct net_device *dev;
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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_CABLE_TEST_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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if (!dev->phydev) {
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ret = -EOPNOTSUPP;
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goto out_dev_put;
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}
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rtnl_lock();
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ops = ethtool_phy_ops;
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if (!ops || !ops->start_cable_test) {
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ret = -EOPNOTSUPP;
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goto out_rtnl;
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}
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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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ret = ops->start_cable_test(dev->phydev, info->extack);
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ethnl_ops_complete(dev);
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if (!ret)
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ethnl_cable_test_started(dev->phydev,
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ETHTOOL_MSG_CABLE_TEST_NTF);
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out_rtnl:
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rtnl_unlock();
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out_dev_put:
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ethnl_parse_header_dev_put(&req_info);
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return ret;
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}
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int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
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{
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int err = -ENOMEM;
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/* One TDR sample occupies 20 bytes. For a 150 meter cable,
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* with four pairs, around 12K is needed.
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*/
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phydev->skb = genlmsg_new(SZ_16K, GFP_KERNEL);
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if (!phydev->skb)
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goto out;
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phydev->ehdr = ethnl_bcastmsg_put(phydev->skb, cmd);
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if (!phydev->ehdr) {
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err = -EMSGSIZE;
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goto out;
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}
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err = ethnl_fill_reply_header(phydev->skb, phydev->attached_dev,
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ETHTOOL_A_CABLE_TEST_NTF_HEADER);
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if (err)
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goto out;
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err = nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
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ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED);
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if (err)
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goto out;
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phydev->nest = nla_nest_start(phydev->skb,
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ETHTOOL_A_CABLE_TEST_NTF_NEST);
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if (!phydev->nest) {
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err = -EMSGSIZE;
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goto out;
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}
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return 0;
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out:
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nlmsg_free(phydev->skb);
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phydev->skb = NULL;
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return err;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_alloc);
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void ethnl_cable_test_free(struct phy_device *phydev)
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{
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nlmsg_free(phydev->skb);
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phydev->skb = NULL;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_free);
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void ethnl_cable_test_finished(struct phy_device *phydev)
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{
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nla_nest_end(phydev->skb, phydev->nest);
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genlmsg_end(phydev->skb, phydev->ehdr);
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ethnl_multicast(phydev->skb, phydev->attached_dev);
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_finished);
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int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result)
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{
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struct nlattr *nest;
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int ret = -EMSGSIZE;
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nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_NEST_RESULT);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_PAIR, pair))
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goto err;
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if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_CODE, result))
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goto err;
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nla_nest_end(phydev->skb, nest);
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return 0;
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err:
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nla_nest_cancel(phydev->skb, nest);
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return ret;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_result);
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int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm)
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{
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struct nlattr *nest;
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int ret = -EMSGSIZE;
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nest = nla_nest_start(phydev->skb,
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ETHTOOL_A_CABLE_NEST_FAULT_LENGTH);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR, pair))
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goto err;
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if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_CM, cm))
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goto err;
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nla_nest_end(phydev->skb, nest);
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return 0;
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err:
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nla_nest_cancel(phydev->skb, nest);
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return ret;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);
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struct cable_test_tdr_req_info {
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struct ethnl_req_info base;
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};
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static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
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[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST] = { .type = NLA_U32 },
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[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST] = { .type = NLA_U32 },
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[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP] = { .type = NLA_U32 },
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[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR] = { .type = NLA_U8 },
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};
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const struct nla_policy ethnl_cable_test_tdr_act_policy[] = {
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[ETHTOOL_A_CABLE_TEST_TDR_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_CABLE_TEST_TDR_CFG] = { .type = NLA_NESTED },
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};
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/* CABLE_TEST_TDR_ACT */
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static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
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struct genl_info *info,
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struct phy_tdr_config *cfg)
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{
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struct nlattr *tb[ARRAY_SIZE(cable_test_tdr_act_cfg_policy)];
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int ret;
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cfg->first = 100;
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cfg->step = 100;
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cfg->last = MAX_CABLE_LENGTH_CM;
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cfg->pair = PHY_PAIR_ALL;
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if (!nest)
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return 0;
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ret = nla_parse_nested(tb,
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ARRAY_SIZE(cable_test_tdr_act_cfg_policy) - 1,
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nest, cable_test_tdr_act_cfg_policy,
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info->extack);
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if (ret < 0)
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return ret;
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if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST])
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cfg->first = nla_get_u32(
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]);
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if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST])
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cfg->last = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]);
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if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP])
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cfg->step = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]);
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if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]) {
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cfg->pair = nla_get_u8(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]);
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if (cfg->pair > ETHTOOL_A_CABLE_PAIR_D) {
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NL_SET_ERR_MSG_ATTR(
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info->extack,
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR],
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"invalid pair parameter");
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return -EINVAL;
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}
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}
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if (cfg->first > MAX_CABLE_LENGTH_CM) {
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NL_SET_ERR_MSG_ATTR(info->extack,
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST],
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"invalid first parameter");
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return -EINVAL;
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}
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if (cfg->last > MAX_CABLE_LENGTH_CM) {
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NL_SET_ERR_MSG_ATTR(info->extack,
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST],
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"invalid last parameter");
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return -EINVAL;
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}
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if (cfg->first > cfg->last) {
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NL_SET_ERR_MSG(info->extack, "invalid first/last parameter");
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return -EINVAL;
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}
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if (!cfg->step) {
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NL_SET_ERR_MSG_ATTR(info->extack,
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
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"invalid step parameter");
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return -EINVAL;
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}
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if (cfg->step > (cfg->last - cfg->first)) {
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NL_SET_ERR_MSG_ATTR(info->extack,
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tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
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"step parameter too big");
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return -EINVAL;
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}
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return 0;
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}
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int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
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{
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struct ethnl_req_info req_info = {};
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const struct ethtool_phy_ops *ops;
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struct nlattr **tb = info->attrs;
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struct phy_tdr_config cfg;
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struct net_device *dev;
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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_CABLE_TEST_TDR_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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if (!dev->phydev) {
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ret = -EOPNOTSUPP;
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goto out_dev_put;
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}
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ret = ethnl_act_cable_test_tdr_cfg(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG],
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info, &cfg);
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if (ret)
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goto out_dev_put;
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rtnl_lock();
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ops = ethtool_phy_ops;
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if (!ops || !ops->start_cable_test_tdr) {
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ret = -EOPNOTSUPP;
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goto out_rtnl;
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}
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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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ret = ops->start_cable_test_tdr(dev->phydev, info->extack, &cfg);
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ethnl_ops_complete(dev);
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if (!ret)
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ethnl_cable_test_started(dev->phydev,
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ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
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out_rtnl:
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rtnl_unlock();
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out_dev_put:
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ethnl_parse_header_dev_put(&req_info);
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return ret;
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}
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int ethnl_cable_test_amplitude(struct phy_device *phydev,
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u8 pair, s16 mV)
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{
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struct nlattr *nest;
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int ret = -EMSGSIZE;
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nest = nla_nest_start(phydev->skb,
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ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_PAIR, pair))
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goto err;
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if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_mV, mV))
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goto err;
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nla_nest_end(phydev->skb, nest);
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return 0;
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err:
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nla_nest_cancel(phydev->skb, nest);
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return ret;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_amplitude);
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int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
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{
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struct nlattr *nest;
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int ret = -EMSGSIZE;
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nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_PULSE);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_PULSE_mV, mV))
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goto err;
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nla_nest_end(phydev->skb, nest);
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return 0;
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err:
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nla_nest_cancel(phydev->skb, nest);
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return ret;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_pulse);
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int ethnl_cable_test_step(struct phy_device *phydev, u32 first, u32 last,
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u32 step)
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{
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struct nlattr *nest;
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int ret = -EMSGSIZE;
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nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_STEP);
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if (!nest)
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return -EMSGSIZE;
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if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE,
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first))
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goto err;
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if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_LAST_DISTANCE, last))
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goto err;
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if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_STEP_DISTANCE, step))
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goto err;
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nla_nest_end(phydev->skb, nest);
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return 0;
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err:
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nla_nest_cancel(phydev->skb, nest);
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return ret;
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}
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EXPORT_SYMBOL_GPL(ethnl_cable_test_step);
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