From 7f59fb32b0960f1e19651379d8e130bd017054bf Mon Sep 17 00:00:00 2001 From: Michal Kubecek Date: Sat, 28 Mar 2020 00:01:23 +0100 Subject: ethtool: provide pause parameters with PAUSE_GET request Implement PAUSE_GET request to get pause parameters of a network device. These are traditionally available via ETHTOOL_GPAUSEPARAM ioctl request. Signed-off-by: Michal Kubecek Signed-off-by: David S. Miller --- net/ethtool/Makefile | 2 +- net/ethtool/netlink.c | 8 +++++ net/ethtool/netlink.h | 1 + net/ethtool/pause.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 net/ethtool/pause.c (limited to 'net') diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index 7f7f40e03d16..28589ad5fd8a 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -6,4 +6,4 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \ linkstate.o debug.o wol.o features.o privflags.o rings.o \ - channels.o coalesce.o + channels.o coalesce.o pause.o diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 117971e695ca..ca1695de8c9d 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -228,6 +228,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, + [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -801,6 +802,13 @@ static const struct genl_ops ethtool_genl_ops[] = { .flags = GENL_UNS_ADMIN_PERM, .doit = ethnl_set_coalesce, }, + { + .cmd = ETHTOOL_MSG_PAUSE_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 c3fb4fe5a3b7..e14ac089bfb1 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -342,6 +342,7 @@ extern const struct ethnl_request_ops ethnl_privflags_request_ops; extern const struct ethnl_request_ops ethnl_rings_request_ops; extern const struct ethnl_request_ops ethnl_channels_request_ops; extern const struct ethnl_request_ops ethnl_coalesce_request_ops; +extern const struct ethnl_request_ops ethnl_pause_request_ops; int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info); int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info); diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c new file mode 100644 index 000000000000..9feafeb7bb1c --- /dev/null +++ b/net/ethtool/pause.c @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "netlink.h" +#include "common.h" + +struct pause_req_info { + struct ethnl_req_info base; +}; + +struct pause_reply_data { + struct ethnl_reply_data base; + struct ethtool_pauseparam pauseparam; +}; + +#define PAUSE_REPDATA(__reply_base) \ + container_of(__reply_base, struct pause_reply_data, base) + +static const struct nla_policy +pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1] = { + [ETHTOOL_A_PAUSE_UNSPEC] = { .type = NLA_REJECT }, + [ETHTOOL_A_PAUSE_HEADER] = { .type = NLA_NESTED }, + [ETHTOOL_A_PAUSE_AUTONEG] = { .type = NLA_REJECT }, + [ETHTOOL_A_PAUSE_RX] = { .type = NLA_REJECT }, + [ETHTOOL_A_PAUSE_TX] = { .type = NLA_REJECT }, +}; + +static int pause_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct pause_reply_data *data = PAUSE_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + if (!dev->ethtool_ops->get_pauseparam) + return -EOPNOTSUPP; + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + dev->ethtool_ops->get_pauseparam(dev, &data->pauseparam); + ethnl_ops_complete(dev); + + return 0; +} + +static int pause_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + return nla_total_size(sizeof(u8)) + /* _PAUSE_AUTONEG */ + nla_total_size(sizeof(u8)) + /* _PAUSE_RX */ + nla_total_size(sizeof(u8)); /* _PAUSE_TX */ +} + +static int pause_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct pause_reply_data *data = PAUSE_REPDATA(reply_base); + const struct ethtool_pauseparam *pauseparam = &data->pauseparam; + + if (nla_put_u8(skb, ETHTOOL_A_PAUSE_AUTONEG, !!pauseparam->autoneg) || + nla_put_u8(skb, ETHTOOL_A_PAUSE_RX, !!pauseparam->rx_pause) || + nla_put_u8(skb, ETHTOOL_A_PAUSE_TX, !!pauseparam->tx_pause)) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_pause_request_ops = { + .request_cmd = ETHTOOL_MSG_PAUSE_GET, + .reply_cmd = ETHTOOL_MSG_PAUSE_GET_REPLY, + .hdr_attr = ETHTOOL_A_PAUSE_HEADER, + .max_attr = ETHTOOL_A_PAUSE_MAX, + .req_info_size = sizeof(struct pause_req_info), + .reply_data_size = sizeof(struct pause_reply_data), + .request_policy = pause_get_policy, + + .prepare_data = pause_prepare_data, + .reply_size = pause_reply_size, + .fill_reply = pause_fill_reply, +}; -- cgit