From 459e0b81b37043545d90629fdfb243444151e77d Mon Sep 17 00:00:00 2001 From: Michal Kubecek Date: Fri, 27 Dec 2019 15:55:48 +0100 Subject: ethtool: provide link settings with LINKINFO_GET request Implement LINKINFO_GET netlink request to get basic link settings provided by ETHTOOL_GLINKSETTINGS and ETHTOOL_GSET ioctl commands. This request provides settings not directly related to autonegotiation and link mode selection: physical port, phy MDIO address, MDI(-X) status, MDI(-X) control and transceiver. LINKINFO_GET request can be used with NLM_F_DUMP (without device identification) to request the information for all devices in current network namespace providing the data. Signed-off-by: Michal Kubecek Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- net/ethtool/Makefile | 2 +- net/ethtool/common.c | 48 ++++++++++++++++++++++++++ net/ethtool/common.h | 4 +++ net/ethtool/ioctl.c | 48 -------------------------- net/ethtool/linkinfo.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++ net/ethtool/netlink.c | 8 +++++ net/ethtool/netlink.h | 1 + 7 files changed, 156 insertions(+), 49 deletions(-) create mode 100644 net/ethtool/linkinfo.c (limited to 'net/ethtool') diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index efcc42c34d62..765736ec52c0 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -4,4 +4,4 @@ obj-y += ioctl.o common.o obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o -ethtool_nl-y := netlink.o bitset.o strset.o +ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o diff --git a/net/ethtool/common.c b/net/ethtool/common.c index 0a8728565356..1d4a0aeff2cb 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -169,3 +169,51 @@ const char link_mode_names[][ETH_GSTRING_LEN] = { __DEFINE_LINK_MODE_NAME(400000, CR8, Full), }; static_assert(ARRAY_SIZE(link_mode_names) == __ETHTOOL_LINK_MODE_MASK_NBITS); + +/* return false if legacy contained non-0 deprecated fields + * maxtxpkt/maxrxpkt. rest of ksettings always updated + */ +bool +convert_legacy_settings_to_link_ksettings( + struct ethtool_link_ksettings *link_ksettings, + const struct ethtool_cmd *legacy_settings) +{ + bool retval = true; + + memset(link_ksettings, 0, sizeof(*link_ksettings)); + + /* This is used to tell users that driver is still using these + * deprecated legacy fields, and they should not use + * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS + */ + if (legacy_settings->maxtxpkt || + legacy_settings->maxrxpkt) + retval = false; + + ethtool_convert_legacy_u32_to_link_mode( + link_ksettings->link_modes.supported, + legacy_settings->supported); + ethtool_convert_legacy_u32_to_link_mode( + link_ksettings->link_modes.advertising, + legacy_settings->advertising); + ethtool_convert_legacy_u32_to_link_mode( + link_ksettings->link_modes.lp_advertising, + legacy_settings->lp_advertising); + link_ksettings->base.speed + = ethtool_cmd_speed(legacy_settings); + link_ksettings->base.duplex + = legacy_settings->duplex; + link_ksettings->base.port + = legacy_settings->port; + link_ksettings->base.phy_address + = legacy_settings->phy_address; + link_ksettings->base.autoneg + = legacy_settings->autoneg; + link_ksettings->base.mdio_support + = legacy_settings->mdio_support; + link_ksettings->base.eth_tp_mdix + = legacy_settings->eth_tp_mdix; + link_ksettings->base.eth_tp_mdix_ctrl + = legacy_settings->eth_tp_mdix_ctrl; + return retval; +} diff --git a/net/ethtool/common.h b/net/ethtool/common.h index bbb788908cb1..c8a237402729 100644 --- a/net/ethtool/common.h +++ b/net/ethtool/common.h @@ -19,4 +19,8 @@ extern const char phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN]; extern const char link_mode_names[][ETH_GSTRING_LEN]; +bool convert_legacy_settings_to_link_ksettings( + struct ethtool_link_ksettings *link_ksettings, + const struct ethtool_cmd *legacy_settings); + #endif /* _ETHTOOL_COMMON_H */ diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 88f7cddf5a6f..8a0a13b478e0 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -358,54 +358,6 @@ bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, } EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); -/* return false if legacy contained non-0 deprecated fields - * maxtxpkt/maxrxpkt. rest of ksettings always updated - */ -static bool -convert_legacy_settings_to_link_ksettings( - struct ethtool_link_ksettings *link_ksettings, - const struct ethtool_cmd *legacy_settings) -{ - bool retval = true; - - memset(link_ksettings, 0, sizeof(*link_ksettings)); - - /* This is used to tell users that driver is still using these - * deprecated legacy fields, and they should not use - * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS - */ - if (legacy_settings->maxtxpkt || - legacy_settings->maxrxpkt) - retval = false; - - ethtool_convert_legacy_u32_to_link_mode( - link_ksettings->link_modes.supported, - legacy_settings->supported); - ethtool_convert_legacy_u32_to_link_mode( - link_ksettings->link_modes.advertising, - legacy_settings->advertising); - ethtool_convert_legacy_u32_to_link_mode( - link_ksettings->link_modes.lp_advertising, - legacy_settings->lp_advertising); - link_ksettings->base.speed - = ethtool_cmd_speed(legacy_settings); - link_ksettings->base.duplex - = legacy_settings->duplex; - link_ksettings->base.port - = legacy_settings->port; - link_ksettings->base.phy_address - = legacy_settings->phy_address; - link_ksettings->base.autoneg - = legacy_settings->autoneg; - link_ksettings->base.mdio_support - = legacy_settings->mdio_support; - link_ksettings->base.eth_tp_mdix - = legacy_settings->eth_tp_mdix; - link_ksettings->base.eth_tp_mdix_ctrl - = legacy_settings->eth_tp_mdix_ctrl; - return retval; -} - /* return false if ksettings link modes had higher bits * set. legacy_settings always updated (best effort) */ diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c new file mode 100644 index 000000000000..f52a31af6fff --- /dev/null +++ b/net/ethtool/linkinfo.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" + +struct linkinfo_req_info { + struct ethnl_req_info base; +}; + +struct linkinfo_reply_data { + struct ethnl_reply_data base; + struct ethtool_link_ksettings ksettings; + struct ethtool_link_settings *lsettings; +}; + +#define LINKINFO_REPDATA(__reply_base) \ + container_of(__reply_base, struct linkinfo_reply_data, base) + +static const struct nla_policy +linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1] = { + [ETHTOOL_A_LINKINFO_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_LINKINFO_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_LINKINFO_PORT] = { .type = NLA_REJECT }, + [ETHTOOL_A_LINKINFO_PHYADDR] = { .type = NLA_REJECT }, + [ETHTOOL_A_LINKINFO_TP_MDIX] = { .type = NLA_REJECT }, + [ETHTOOL_A_LINKINFO_TP_MDIX_CTRL] = { .type = NLA_REJECT }, + [ETHTOOL_A_LINKINFO_TRANSCEIVER] = { .type = NLA_REJECT }, +}; + +static int linkinfo_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + data->lsettings = &data->ksettings.base; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + ret = __ethtool_get_link_ksettings(dev, &data->ksettings); + if (ret < 0 && info) + GENL_SET_ERR_MSG(info, "failed to retrieve link settings"); + ethnl_ops_complete(dev); + + return ret; +} + +static int linkinfo_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + return nla_total_size(sizeof(u8)) /* LINKINFO_PORT */ + + nla_total_size(sizeof(u8)) /* LINKINFO_PHYADDR */ + + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX */ + + nla_total_size(sizeof(u8)) /* LINKINFO_TP_MDIX_CTRL */ + + nla_total_size(sizeof(u8)) /* LINKINFO_TRANSCEIVER */ + + 0; +} + +static int linkinfo_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct linkinfo_reply_data *data = LINKINFO_REPDATA(reply_base); + + if (nla_put_u8(skb, ETHTOOL_A_LINKINFO_PORT, data->lsettings->port) || + nla_put_u8(skb, ETHTOOL_A_LINKINFO_PHYADDR, + data->lsettings->phy_address) || + nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX, + data->lsettings->eth_tp_mdix) || + nla_put_u8(skb, ETHTOOL_A_LINKINFO_TP_MDIX_CTRL, + data->lsettings->eth_tp_mdix_ctrl) || + nla_put_u8(skb, ETHTOOL_A_LINKINFO_TRANSCEIVER, + data->lsettings->transceiver)) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_linkinfo_request_ops = { + .request_cmd = ETHTOOL_MSG_LINKINFO_GET, + .reply_cmd = ETHTOOL_MSG_LINKINFO_GET_REPLY, + .hdr_attr = ETHTOOL_A_LINKINFO_HEADER, + .max_attr = ETHTOOL_A_LINKINFO_MAX, + .req_info_size = sizeof(struct linkinfo_req_info), + .reply_data_size = sizeof(struct linkinfo_reply_data), + .request_policy = linkinfo_get_policy, + + .prepare_data = linkinfo_prepare_data, + .reply_size = linkinfo_reply_size, + .fill_reply = linkinfo_fill_reply, +}; diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 7dc082bde670..ce86d97c922e 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -195,6 +195,7 @@ struct ethnl_dump_ctx { static const struct ethnl_request_ops * ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, + [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -526,6 +527,13 @@ static const struct genl_ops ethtool_genl_ops[] = { .dumpit = ethnl_default_dumpit, .done = ethnl_default_done, }, + { + .cmd = ETHTOOL_MSG_LINKINFO_GET, + .doit = ethnl_default_doit, + .start = ethnl_default_start, + .dumpit = ethnl_default_dumpit, + .done = ethnl_default_done, + }, }; static const struct genl_multicast_group ethtool_nl_mcgrps[] = { diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 44e9f63aefb7..9fc8f94d8dce 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -329,5 +329,6 @@ struct ethnl_request_ops { /* request handlers */ extern const struct ethnl_request_ops ethnl_strset_request_ops; +extern const struct ethnl_request_ops ethnl_linkinfo_request_ops; #endif /* _NET_ETHTOOL_NETLINK_H */ -- cgit v1.2.3