479 lines
12 KiB
C
479 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include "netlink.h"
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#include "common.h"
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struct strset_info {
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bool per_dev;
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bool free_strings;
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unsigned int count;
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const char (*strings)[ETH_GSTRING_LEN];
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};
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static const struct strset_info info_template[] = {
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[ETH_SS_TEST] = {
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.per_dev = true,
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},
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[ETH_SS_STATS] = {
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.per_dev = true,
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},
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[ETH_SS_PRIV_FLAGS] = {
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.per_dev = true,
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},
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[ETH_SS_FEATURES] = {
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.per_dev = false,
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.count = ARRAY_SIZE(netdev_features_strings),
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.strings = netdev_features_strings,
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},
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[ETH_SS_RSS_HASH_FUNCS] = {
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.per_dev = false,
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.count = ARRAY_SIZE(rss_hash_func_strings),
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.strings = rss_hash_func_strings,
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},
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[ETH_SS_TUNABLES] = {
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.per_dev = false,
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.count = ARRAY_SIZE(tunable_strings),
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.strings = tunable_strings,
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},
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[ETH_SS_PHY_STATS] = {
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.per_dev = true,
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},
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[ETH_SS_PHY_TUNABLES] = {
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.per_dev = false,
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.count = ARRAY_SIZE(phy_tunable_strings),
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.strings = phy_tunable_strings,
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},
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[ETH_SS_LINK_MODES] = {
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.per_dev = false,
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.count = __ETHTOOL_LINK_MODE_MASK_NBITS,
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.strings = link_mode_names,
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},
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[ETH_SS_MSG_CLASSES] = {
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.per_dev = false,
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.count = NETIF_MSG_CLASS_COUNT,
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.strings = netif_msg_class_names,
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},
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[ETH_SS_WOL_MODES] = {
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.per_dev = false,
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.count = WOL_MODE_COUNT,
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.strings = wol_mode_names,
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},
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[ETH_SS_SOF_TIMESTAMPING] = {
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.per_dev = false,
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.count = __SOF_TIMESTAMPING_CNT,
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.strings = sof_timestamping_names,
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},
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[ETH_SS_TS_TX_TYPES] = {
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.per_dev = false,
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.count = __HWTSTAMP_TX_CNT,
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.strings = ts_tx_type_names,
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},
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[ETH_SS_TS_RX_FILTERS] = {
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.per_dev = false,
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.count = __HWTSTAMP_FILTER_CNT,
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.strings = ts_rx_filter_names,
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},
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[ETH_SS_UDP_TUNNEL_TYPES] = {
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.per_dev = false,
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.count = __ETHTOOL_UDP_TUNNEL_TYPE_CNT,
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.strings = udp_tunnel_type_names,
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},
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[ETH_SS_STATS_STD] = {
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.per_dev = false,
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.count = __ETHTOOL_STATS_CNT,
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.strings = stats_std_names,
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},
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[ETH_SS_STATS_ETH_PHY] = {
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.per_dev = false,
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.count = __ETHTOOL_A_STATS_ETH_PHY_CNT,
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.strings = stats_eth_phy_names,
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},
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[ETH_SS_STATS_ETH_MAC] = {
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.per_dev = false,
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.count = __ETHTOOL_A_STATS_ETH_MAC_CNT,
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.strings = stats_eth_mac_names,
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},
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[ETH_SS_STATS_ETH_CTRL] = {
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.per_dev = false,
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.count = __ETHTOOL_A_STATS_ETH_CTRL_CNT,
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.strings = stats_eth_ctrl_names,
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},
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[ETH_SS_STATS_RMON] = {
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.per_dev = false,
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.count = __ETHTOOL_A_STATS_RMON_CNT,
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.strings = stats_rmon_names,
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},
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};
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struct strset_req_info {
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struct ethnl_req_info base;
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u32 req_ids;
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bool counts_only;
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};
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#define STRSET_REQINFO(__req_base) \
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container_of(__req_base, struct strset_req_info, base)
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struct strset_reply_data {
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struct ethnl_reply_data base;
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struct strset_info sets[ETH_SS_COUNT];
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};
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#define STRSET_REPDATA(__reply_base) \
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container_of(__reply_base, struct strset_reply_data, base)
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const struct nla_policy ethnl_strset_get_policy[] = {
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[ETHTOOL_A_STRSET_HEADER] =
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NLA_POLICY_NESTED(ethnl_header_policy),
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[ETHTOOL_A_STRSET_STRINGSETS] = { .type = NLA_NESTED },
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[ETHTOOL_A_STRSET_COUNTS_ONLY] = { .type = NLA_FLAG },
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};
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static const struct nla_policy get_stringset_policy[] = {
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[ETHTOOL_A_STRINGSET_ID] = { .type = NLA_U32 },
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};
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/**
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* strset_include() - test if a string set should be included in reply
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* @info: parsed client request
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* @data: pointer to request data structure
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* @id: id of string set to check (ETH_SS_* constants)
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*/
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static bool strset_include(const struct strset_req_info *info,
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const struct strset_reply_data *data, u32 id)
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{
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bool per_dev;
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BUILD_BUG_ON(ETH_SS_COUNT >= BITS_PER_BYTE * sizeof(info->req_ids));
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if (info->req_ids)
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return info->req_ids & (1U << id);
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per_dev = data->sets[id].per_dev;
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if (!per_dev && !data->sets[id].strings)
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return false;
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return data->base.dev ? per_dev : !per_dev;
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}
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static int strset_get_id(const struct nlattr *nest, u32 *val,
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struct netlink_ext_ack *extack)
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{
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struct nlattr *tb[ARRAY_SIZE(get_stringset_policy)];
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int ret;
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ret = nla_parse_nested(tb, ARRAY_SIZE(get_stringset_policy) - 1, nest,
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get_stringset_policy, extack);
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if (ret < 0)
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return ret;
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if (!tb[ETHTOOL_A_STRINGSET_ID])
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return -EINVAL;
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*val = nla_get_u32(tb[ETHTOOL_A_STRINGSET_ID]);
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return 0;
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}
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static const struct nla_policy strset_stringsets_policy[] = {
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[ETHTOOL_A_STRINGSETS_STRINGSET] = { .type = NLA_NESTED },
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};
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static int strset_parse_request(struct ethnl_req_info *req_base,
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struct nlattr **tb,
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struct netlink_ext_ack *extack)
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{
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struct strset_req_info *req_info = STRSET_REQINFO(req_base);
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struct nlattr *nest = tb[ETHTOOL_A_STRSET_STRINGSETS];
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struct nlattr *attr;
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int rem, ret;
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if (!nest)
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return 0;
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ret = nla_validate_nested(nest,
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ARRAY_SIZE(strset_stringsets_policy) - 1,
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strset_stringsets_policy, extack);
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if (ret < 0)
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return ret;
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req_info->counts_only = tb[ETHTOOL_A_STRSET_COUNTS_ONLY];
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nla_for_each_nested(attr, nest, rem) {
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u32 id;
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if (WARN_ONCE(nla_type(attr) != ETHTOOL_A_STRINGSETS_STRINGSET,
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"unexpected attrtype %u in ETHTOOL_A_STRSET_STRINGSETS\n",
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nla_type(attr)))
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return -EINVAL;
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ret = strset_get_id(attr, &id, extack);
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if (ret < 0)
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return ret;
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if (id >= ETH_SS_COUNT) {
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NL_SET_ERR_MSG_ATTR(extack, attr,
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"unknown string set id");
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return -EOPNOTSUPP;
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}
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req_info->req_ids |= (1U << id);
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}
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return 0;
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}
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static void strset_cleanup_data(struct ethnl_reply_data *reply_base)
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{
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struct strset_reply_data *data = STRSET_REPDATA(reply_base);
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unsigned int i;
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for (i = 0; i < ETH_SS_COUNT; i++)
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if (data->sets[i].free_strings) {
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kfree(data->sets[i].strings);
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data->sets[i].strings = NULL;
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data->sets[i].free_strings = false;
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}
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}
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static int strset_prepare_set(struct strset_info *info, struct net_device *dev,
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unsigned int id, bool counts_only)
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{
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const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
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const struct ethtool_ops *ops = dev->ethtool_ops;
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void *strings;
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int count, ret;
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if (id == ETH_SS_PHY_STATS && dev->phydev &&
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!ops->get_ethtool_phy_stats && phy_ops &&
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phy_ops->get_sset_count)
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ret = phy_ops->get_sset_count(dev->phydev);
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else if (ops->get_sset_count && ops->get_strings)
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ret = ops->get_sset_count(dev, id);
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else
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ret = -EOPNOTSUPP;
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if (ret <= 0) {
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info->count = 0;
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return 0;
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}
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count = ret;
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if (!counts_only) {
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strings = kcalloc(count, ETH_GSTRING_LEN, GFP_KERNEL);
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if (!strings)
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return -ENOMEM;
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if (id == ETH_SS_PHY_STATS && dev->phydev &&
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!ops->get_ethtool_phy_stats && phy_ops &&
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phy_ops->get_strings)
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phy_ops->get_strings(dev->phydev, strings);
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else
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ops->get_strings(dev, id, strings);
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info->strings = strings;
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info->free_strings = true;
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}
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info->count = count;
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return 0;
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}
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static int strset_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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const struct strset_req_info *req_info = STRSET_REQINFO(req_base);
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struct strset_reply_data *data = STRSET_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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unsigned int i;
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int ret;
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BUILD_BUG_ON(ARRAY_SIZE(info_template) != ETH_SS_COUNT);
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memcpy(&data->sets, &info_template, sizeof(data->sets));
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if (!dev) {
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for (i = 0; i < ETH_SS_COUNT; i++) {
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if ((req_info->req_ids & (1U << i)) &&
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data->sets[i].per_dev) {
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if (info)
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GENL_SET_ERR_MSG(info, "requested per device strings without dev");
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return -EINVAL;
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}
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}
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return 0;
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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 err_strset;
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for (i = 0; i < ETH_SS_COUNT; i++) {
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if (!strset_include(req_info, data, i) ||
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!data->sets[i].per_dev)
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continue;
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ret = strset_prepare_set(&data->sets[i], dev, i,
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req_info->counts_only);
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if (ret < 0)
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goto err_ops;
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}
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ethnl_ops_complete(dev);
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return 0;
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err_ops:
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ethnl_ops_complete(dev);
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err_strset:
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strset_cleanup_data(reply_base);
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return ret;
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}
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/* calculate size of ETHTOOL_A_STRSET_STRINGSET nest for one string set */
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static int strset_set_size(const struct strset_info *info, bool counts_only)
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{
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unsigned int len = 0;
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unsigned int i;
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if (info->count == 0)
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return 0;
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if (counts_only)
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return nla_total_size(2 * nla_total_size(sizeof(u32)));
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for (i = 0; i < info->count; i++) {
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const char *str = info->strings[i];
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/* ETHTOOL_A_STRING_INDEX, ETHTOOL_A_STRING_VALUE, nest */
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len += nla_total_size(nla_total_size(sizeof(u32)) +
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ethnl_strz_size(str));
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}
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/* ETHTOOL_A_STRINGSET_ID, ETHTOOL_A_STRINGSET_COUNT */
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len = 2 * nla_total_size(sizeof(u32)) + nla_total_size(len);
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return nla_total_size(len);
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}
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static int strset_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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const struct strset_req_info *req_info = STRSET_REQINFO(req_base);
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const struct strset_reply_data *data = STRSET_REPDATA(reply_base);
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unsigned int i;
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int len = 0;
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int ret;
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for (i = 0; i < ETH_SS_COUNT; i++) {
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const struct strset_info *set_info = &data->sets[i];
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if (!strset_include(req_info, data, i))
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continue;
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ret = strset_set_size(set_info, req_info->counts_only);
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if (ret < 0)
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return ret;
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len += ret;
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}
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return len;
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}
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/* fill one string into reply */
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static int strset_fill_string(struct sk_buff *skb,
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const struct strset_info *set_info, u32 idx)
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{
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struct nlattr *string_attr;
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const char *value;
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value = set_info->strings[idx];
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string_attr = nla_nest_start(skb, ETHTOOL_A_STRINGS_STRING);
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if (!string_attr)
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return -EMSGSIZE;
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if (nla_put_u32(skb, ETHTOOL_A_STRING_INDEX, idx) ||
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ethnl_put_strz(skb, ETHTOOL_A_STRING_VALUE, value))
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goto nla_put_failure;
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nla_nest_end(skb, string_attr);
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return 0;
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nla_put_failure:
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nla_nest_cancel(skb, string_attr);
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return -EMSGSIZE;
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}
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/* fill one string set into reply */
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static int strset_fill_set(struct sk_buff *skb,
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const struct strset_info *set_info, u32 id,
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bool counts_only)
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{
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struct nlattr *stringset_attr;
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struct nlattr *strings_attr;
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unsigned int i;
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if (!set_info->per_dev && !set_info->strings)
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return -EOPNOTSUPP;
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if (set_info->count == 0)
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return 0;
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stringset_attr = nla_nest_start(skb, ETHTOOL_A_STRINGSETS_STRINGSET);
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if (!stringset_attr)
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return -EMSGSIZE;
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if (nla_put_u32(skb, ETHTOOL_A_STRINGSET_ID, id) ||
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nla_put_u32(skb, ETHTOOL_A_STRINGSET_COUNT, set_info->count))
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goto nla_put_failure;
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if (!counts_only) {
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strings_attr = nla_nest_start(skb, ETHTOOL_A_STRINGSET_STRINGS);
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if (!strings_attr)
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goto nla_put_failure;
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for (i = 0; i < set_info->count; i++) {
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if (strset_fill_string(skb, set_info, i) < 0)
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goto nla_put_failure;
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}
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nla_nest_end(skb, strings_attr);
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}
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nla_nest_end(skb, stringset_attr);
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return 0;
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nla_put_failure:
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nla_nest_cancel(skb, stringset_attr);
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return -EMSGSIZE;
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}
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static int strset_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 strset_req_info *req_info = STRSET_REQINFO(req_base);
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const struct strset_reply_data *data = STRSET_REPDATA(reply_base);
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struct nlattr *nest;
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unsigned int i;
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int ret;
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nest = nla_nest_start(skb, ETHTOOL_A_STRSET_STRINGSETS);
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if (!nest)
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return -EMSGSIZE;
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for (i = 0; i < ETH_SS_COUNT; i++) {
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if (strset_include(req_info, data, i)) {
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ret = strset_fill_set(skb, &data->sets[i], i,
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req_info->counts_only);
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if (ret < 0)
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goto nla_put_failure;
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}
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}
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nla_nest_end(skb, nest);
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return 0;
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nla_put_failure:
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nla_nest_cancel(skb, nest);
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return ret;
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}
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const struct ethnl_request_ops ethnl_strset_request_ops = {
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.request_cmd = ETHTOOL_MSG_STRSET_GET,
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.reply_cmd = ETHTOOL_MSG_STRSET_GET_REPLY,
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.hdr_attr = ETHTOOL_A_STRSET_HEADER,
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.req_info_size = sizeof(struct strset_req_info),
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.reply_data_size = sizeof(struct strset_reply_data),
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.allow_nodev_do = true,
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.parse_request = strset_parse_request,
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.prepare_data = strset_prepare_data,
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.reply_size = strset_reply_size,
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.fill_reply = strset_fill_reply,
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.cleanup_data = strset_cleanup_data,
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};
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