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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227// SPDX-License-Identifier: GPL-2.0-only
#include <linux/phy.h>#include <linux/phylib_stubs.h>
#include "common.h"#include "netlink.h"
struct linkstate_req_info { struct ethnl_req_info base;};
struct linkstate_reply_data { struct ethnl_reply_data base; int link; int sqi; int sqi_max; struct ethtool_link_ext_stats link_stats; bool link_ext_state_provided; struct ethtool_link_ext_state_info ethtool_link_ext_state_info;};
#define LINKSTATE_REPDATA(__reply_base) \ container_of(__reply_base, struct linkstate_reply_data, base)
const struct nla_policy ethnl_linkstate_get_policy[] = { [ETHTOOL_A_LINKSTATE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats),};
static int linkstate_get_sqi(struct phy_device *phydev){ int ret;
if (!phydev) return -EOPNOTSUPP;
mutex_lock(&phydev->lock); if (!phydev->drv || !phydev->drv->get_sqi) ret = -EOPNOTSUPP; else if (!phydev->link) ret = -ENETDOWN; else ret = phydev->drv->get_sqi(phydev); mutex_unlock(&phydev->lock);
return ret;}
static int linkstate_get_sqi_max(struct phy_device *phydev){ int ret;
if (!phydev) return -EOPNOTSUPP;
mutex_lock(&phydev->lock); if (!phydev->drv || !phydev->drv->get_sqi_max) ret = -EOPNOTSUPP; else if (!phydev->link) ret = -ENETDOWN; else ret = phydev->drv->get_sqi_max(phydev); mutex_unlock(&phydev->lock);
return ret;};
static bool linkstate_sqi_critical_error(int sqi){ return sqi < 0 && sqi != -EOPNOTSUPP && sqi != -ENETDOWN;}
static bool linkstate_sqi_valid(struct linkstate_reply_data *data){ return data->sqi >= 0 && data->sqi_max >= 0 && data->sqi <= data->sqi_max;}
static int linkstate_get_link_ext_state(struct net_device *dev, struct linkstate_reply_data *data){ int err;
if (!dev->ethtool_ops->get_link_ext_state) return -EOPNOTSUPP;
err = dev->ethtool_ops->get_link_ext_state(dev, &data->ethtool_link_ext_state_info); if (err) return err;
data->link_ext_state_provided = true;
return 0;}
static int linkstate_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, const struct genl_info *info){ struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); struct net_device *dev = reply_base->dev; struct nlattr **tb = info->attrs; struct phy_device *phydev; int ret;
phydev = ethnl_req_get_phydev(req_base, tb, ETHTOOL_A_LINKSTATE_HEADER, info->extack); if (IS_ERR(phydev)) return PTR_ERR(phydev);
ret = ethnl_ops_begin(dev); if (ret < 0) return ret; data->link = __ethtool_get_link(dev);
ret = linkstate_get_sqi(phydev); if (linkstate_sqi_critical_error(ret)) goto out; data->sqi = ret;
ret = linkstate_get_sqi_max(phydev); if (linkstate_sqi_critical_error(ret)) goto out; data->sqi_max = ret;
if (dev->flags & IFF_UP) { ret = linkstate_get_link_ext_state(dev, data); if (ret < 0 && ret != -EOPNOTSUPP && ret != -ENODATA) goto out; }
ethtool_stats_init((u64 *)&data->link_stats, sizeof(data->link_stats) / 8);
if (req_base->flags & ETHTOOL_FLAG_STATS) { if (phydev) phy_ethtool_get_link_ext_stats(phydev, &data->link_stats);
if (dev->ethtool_ops->get_link_ext_stats) dev->ethtool_ops->get_link_ext_stats(dev, &data->link_stats); }
ret = 0;out: ethnl_ops_complete(dev); return ret;}
static int linkstate_reply_size(const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base); int len;
len = nla_total_size(sizeof(u8)) /* LINKSTATE_LINK */ + 0;
if (linkstate_sqi_valid(data)) { len += nla_total_size(sizeof(u32)); /* LINKSTATE_SQI */ len += nla_total_size(sizeof(u32)); /* LINKSTATE_SQI_MAX */ }
if (data->link_ext_state_provided) len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_STATE */
if (data->ethtool_link_ext_state_info.__link_ext_substate) len += nla_total_size(sizeof(u8)); /* LINKSTATE_EXT_SUBSTATE */
if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET) len += nla_total_size(sizeof(u32));
return len;}
static int linkstate_fill_reply(struct sk_buff *skb, const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base){ struct linkstate_reply_data *data = LINKSTATE_REPDATA(reply_base);
if (data->link >= 0 && nla_put_u8(skb, ETHTOOL_A_LINKSTATE_LINK, !!data->link)) return -EMSGSIZE;
if (linkstate_sqi_valid(data)) { if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI, data->sqi)) return -EMSGSIZE;
if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_SQI_MAX, data->sqi_max)) return -EMSGSIZE; }
if (data->link_ext_state_provided) { if (nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_STATE, data->ethtool_link_ext_state_info.link_ext_state)) return -EMSGSIZE;
if (data->ethtool_link_ext_state_info.__link_ext_substate && nla_put_u8(skb, ETHTOOL_A_LINKSTATE_EXT_SUBSTATE, data->ethtool_link_ext_state_info.__link_ext_substate)) return -EMSGSIZE; }
if (data->link_stats.link_down_events != ETHTOOL_STAT_NOT_SET) if (nla_put_u32(skb, ETHTOOL_A_LINKSTATE_EXT_DOWN_CNT, data->link_stats.link_down_events)) return -EMSGSIZE;
return 0;}
const struct ethnl_request_ops ethnl_linkstate_request_ops = { .request_cmd = ETHTOOL_MSG_LINKSTATE_GET, .reply_cmd = ETHTOOL_MSG_LINKSTATE_GET_REPLY, .hdr_attr = ETHTOOL_A_LINKSTATE_HEADER, .req_info_size = sizeof(struct linkstate_req_info), .reply_data_size = sizeof(struct linkstate_reply_data),
.prepare_data = linkstate_prepare_data, .reply_size = linkstate_reply_size, .fill_reply = linkstate_fill_reply,};