From patchwork Fri Apr 16 19:27:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 423751 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26778C433B4 for ; Fri, 16 Apr 2021 19:28:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECE8F6137D for ; Fri, 16 Apr 2021 19:28:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243471AbhDPT2g (ORCPT ); Fri, 16 Apr 2021 15:28:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:34200 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243286AbhDPT2V (ORCPT ); Fri, 16 Apr 2021 15:28:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1A13860FF1; Fri, 16 Apr 2021 19:27:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618601276; bh=nc5CsI36sUzDXUFXo0TkbOZg3rh/Pp7HIS++tMVwbA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JPDUOjv786PuX4xpILBHqRLY9hrwS1fpIFcSzztxXdhb5PjxwR6jqF+Rz0H37EmHx N6f83/dDCbtRqDzD/MAWo2027qzO/ihtlgWg8kVqBrt7Xu9woGT73mBhrmTUUoLxk4 ex9mLkBmdC2buHHY40CFCe8UQwYItapzwQAa6G1mk7ckwfrLAzuvoPDeH/CxXsVkMI ZcqbKBJQnL80Cch64tIQL6YqOKv5mk0RtqY6aXUXc8a4GFWsclcS7K3UYS2qCZyoKV sKas0tU2LH8mwYQ1m+ieb2q6/tLd/E1E+/TCYHKfrkR/SQOvPYxhsNIu1kt8d12pce STzOUfm025Vsw== From: Jakub Kicinski To: netdev@vger.kernel.org Cc: davem@davemloft.net, andrew@lunn.ch, mkubecek@suse.cz, idosch@nvidia.com, saeedm@nvidia.com, michael.chan@broadcom.com, Jakub Kicinski Subject: [PATCH net-next v2 6/9] ethtool: add interface to read RMON stats Date: Fri, 16 Apr 2021 12:27:42 -0700 Message-Id: <20210416192745.2851044-7-kuba@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210416192745.2851044-1-kuba@kernel.org> References: <20210416192745.2851044-1-kuba@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Most devices maintain RMON (RFC 2819) stats - particularly the "histogram" of packets received by size. Unlike other RFCs which duplicate IEEE stats, the short/oversized frame counters in RMON don't seem to match IEEE stats 1-to-1 either, so expose those, too. Do not expose basic packet, CRC errors etc - those are already otherwise covered. Because standard defines packet ranges only up to 1518, and everything above that should theoretically be "oversized" - devices often create their own ranges. Going beyond what the RFC defines - expose the "histogram" in the Tx direction (assume for now that the ranges will be the same). Signed-off-by: Jakub Kicinski --- include/linux/ethtool.h | 43 ++++++++++++++ include/uapi/linux/ethtool.h | 2 + include/uapi/linux/ethtool_netlink.h | 23 ++++++++ net/ethtool/netlink.h | 1 + net/ethtool/stats.c | 87 ++++++++++++++++++++++++++++ net/ethtool/strset.c | 5 ++ 6 files changed, 161 insertions(+) diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index 1ca6b836f9fe..e030f7510cd3 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -346,6 +346,44 @@ struct ethtool_fec_stats { } corrected_blocks, uncorrectable_blocks, corrected_bits; }; +/** + * struct ethtool_rmon_hist_range - byte range for histogram statistics + * @low: low bound of the bucket (inclusive) + * @high: high bound of the bucket (inclusive) + */ +struct ethtool_rmon_hist_range { + u16 low; + u16 high; +}; + +#define ETHTOOL_RMON_HIST_MAX 10 + +/** + * struct ethtool_rmon_stats - selected RMON (RFC 2819) statistics + * @undersize_pkts: Equivalent to `etherStatsUndersizePkts` from the RFC. + * @oversize_pkts: Equivalent to `etherStatsOversizePkts` from the RFC. + * @fragments: Equivalent to `etherStatsFragments` from the RFC. + * @jabbers: Equivalent to `etherStatsJabbers` from the RFC. + * @hist: Packet counter for packet length buckets (e.g. + * `etherStatsPkts128to255Octets` from the RFC). + * @hist_tx: Tx counters in similar form to @hist, not defined in the RFC. + * + * Selection of RMON (RFC 2819) statistics which are not exposed via different + * APIs, primarily the packet-length-based counters. + * Unfortunately different designs choose different buckets beyond + * the 1024B mark (jumbo frame teritory), so the definition of the bucket + * ranges is left to the driver. + */ +struct ethtool_rmon_stats { + u64 undersize_pkts; + u64 oversize_pkts; + u64 fragments; + u64 jabbers; + + u64 hist[ETHTOOL_RMON_HIST_MAX]; + u64 hist_tx[ETHTOOL_RMON_HIST_MAX]; +}; + #define ETH_MODULE_EEPROM_PAGE_LEN 128 #define ETH_MODULE_MAX_I2C_ADDRESS 0x7f @@ -534,6 +572,8 @@ struct ethtool_module_eeprom { * @get_eth_phy_stats: Query some of the IEEE 802.3 PHY statistics. * @get_eth_mac_stats: Query some of the IEEE 802.3 MAC statistics. * @get_eth_ctrl_stats: Query some of the IEEE 802.3 MAC Ctrl statistics. + * @get_rmon_stats: Query some of the RMON (RFC 2819) statistics. + * Set %ranges to a pointer to zero-terminated array of byte ranges. * * All operations are optional (i.e. the function pointer may be set * to %NULL) and callers must take this into account. Callers must @@ -650,6 +690,9 @@ struct ethtool_ops { struct ethtool_eth_mac_stats *mac_stats); void (*get_eth_ctrl_stats)(struct net_device *dev, struct ethtool_eth_ctrl_stats *ctrl_stats); + void (*get_rmon_stats)(struct net_device *dev, + struct ethtool_rmon_stats *rmon_stats, + const struct ethtool_rmon_hist_range **ranges); }; int ethtool_check_ops(const struct ethtool_ops *ops); diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 9cb8df89d4f2..cfef6b08169a 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -673,6 +673,7 @@ enum ethtool_link_ext_substate_cable_issue { * @ETH_SS_STATS_ETH_PHY: names of IEEE 802.3 PHY statistics * @ETH_SS_STATS_ETH_MAC: names of IEEE 802.3 MAC statistics * @ETH_SS_STATS_ETH_CTRL: names of IEEE 802.3 MAC Control statistics + * @ETH_SS_STATS_RMON: names of RMON statistics * * @ETH_SS_COUNT: number of defined string sets */ @@ -697,6 +698,7 @@ enum ethtool_stringset { ETH_SS_STATS_ETH_PHY, ETH_SS_STATS_ETH_MAC, ETH_SS_STATS_ETH_CTRL, + ETH_SS_STATS_RMON, /* add new constants above here */ ETH_SS_COUNT diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 2ea5f049df6a..825cfda1c5d5 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -700,6 +700,7 @@ enum { ETHTOOL_STATS_ETH_PHY, ETHTOOL_STATS_ETH_MAC, ETHTOOL_STATS_ETH_CTRL, + ETHTOOL_STATS_RMON, /* add new constants above here */ __ETHTOOL_STATS_CNT @@ -714,6 +715,13 @@ enum { ETHTOOL_A_STATS_GRP_STAT, /* nest */ + ETHTOOL_A_STATS_GRP_HIST_RX, /* nest */ + ETHTOOL_A_STATS_GRP_HIST_TX, /* nest */ + + ETHTOOL_A_STATS_GRP_HIST_BKT_LOW, /* u32 */ + ETHTOOL_A_STATS_GRP_HIST_BKT_HI, /* u32 */ + ETHTOOL_A_STATS_GRP_HIST_VAL, /* u64 */ + /* add new constants above here */ __ETHTOOL_A_STATS_GRP_CNT, ETHTOOL_A_STATS_GRP_MAX = (__ETHTOOL_A_STATS_CNT - 1) @@ -793,6 +801,21 @@ enum { ETHTOOL_A_STATS_ETH_CTRL_MAX = (__ETHTOOL_A_STATS_ETH_CTRL_CNT - 1) }; +enum { + /* etherStatsUndersizePkts */ + ETHTOOL_A_STATS_RMON_UNDERSIZE, + /* etherStatsOversizePkts */ + ETHTOOL_A_STATS_RMON_OVERSIZE, + /* etherStatsFragments */ + ETHTOOL_A_STATS_RMON_FRAG, + /* etherStatsJabbers */ + ETHTOOL_A_STATS_RMON_JABBER, + + /* add new constants above here */ + __ETHTOOL_A_STATS_RMON_CNT, + ETHTOOL_A_STATS_RMON_MAX = (__ETHTOOL_A_STATS_RMON_CNT - 1) +}; + /* generic netlink info */ #define ETHTOOL_GENL_NAME "ethtool" #define ETHTOOL_GENL_VERSION 1 diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index bd96eb57c07c..8abcbc10796c 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -405,5 +405,6 @@ extern const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN]; extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN]; extern const char stats_eth_mac_names[__ETHTOOL_A_STATS_ETH_MAC_CNT][ETH_GSTRING_LEN]; extern const char stats_eth_ctrl_names[__ETHTOOL_A_STATS_ETH_CTRL_CNT][ETH_GSTRING_LEN]; +extern const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN]; #endif /* _NET_ETHTOOL_NETLINK_H */ diff --git a/net/ethtool/stats.c b/net/ethtool/stats.c index f4fded66731c..acb2b080c358 100644 --- a/net/ethtool/stats.c +++ b/net/ethtool/stats.c @@ -17,6 +17,8 @@ struct stats_reply_data { struct ethtool_eth_phy_stats phy_stats; struct ethtool_eth_mac_stats mac_stats; struct ethtool_eth_ctrl_stats ctrl_stats; + struct ethtool_rmon_stats rmon_stats; + const struct ethtool_rmon_hist_range *rmon_ranges; }; #define STATS_REPDATA(__reply_base) \ @@ -26,6 +28,7 @@ const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN] = { [ETHTOOL_STATS_ETH_PHY] = "eth-phy", [ETHTOOL_STATS_ETH_MAC] = "eth-mac", [ETHTOOL_STATS_ETH_CTRL] = "eth-ctrl", + [ETHTOOL_STATS_RMON] = "rmon", }; const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN] = { @@ -63,6 +66,13 @@ const char stats_eth_ctrl_names[__ETHTOOL_A_STATS_ETH_CTRL_CNT][ETH_GSTRING_LEN] [ETHTOOL_A_STATS_ETH_CTRL_5_RX_UNSUP] = "UnsupportedOpcodesReceived", }; +const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN] = { + [ETHTOOL_A_STATS_RMON_UNDERSIZE] = "etherStatsUndersizePkts", + [ETHTOOL_A_STATS_RMON_OVERSIZE] = "etherStatsOversizePkts", + [ETHTOOL_A_STATS_RMON_FRAG] = "etherStatsFragments", + [ETHTOOL_A_STATS_RMON_JABBER] = "etherStatsJabbers", +}; + const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_GROUPS + 1] = { [ETHTOOL_A_STATS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), @@ -107,6 +117,7 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base, memset(&data->phy_stats, 0xff, sizeof(data->phy_stats)); memset(&data->mac_stats, 0xff, sizeof(data->mac_stats)); memset(&data->ctrl_stats, 0xff, sizeof(data->mac_stats)); + memset(&data->rmon_stats, 0xff, sizeof(data->rmon_stats)); if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) && dev->ethtool_ops->get_eth_phy_stats) @@ -117,6 +128,10 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base, if (test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask) && dev->ethtool_ops->get_eth_ctrl_stats) dev->ethtool_ops->get_eth_ctrl_stats(dev, &data->ctrl_stats); + if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask) && + dev->ethtool_ops->get_rmon_stats) + dev->ethtool_ops->get_rmon_stats(dev, &data->rmon_stats, + &data->rmon_ranges); ethnl_ops_complete(dev); return 0; @@ -141,6 +156,16 @@ static int stats_reply_size(const struct ethnl_req_info *req_base, n_stats += sizeof(struct ethtool_eth_ctrl_stats) / sizeof(u64); n_grps++; } + if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask)) { + n_stats += sizeof(struct ethtool_rmon_stats) / sizeof(u64); + n_grps++; + /* Above includes the space for _A_STATS_GRP_HIST_VALs */ + + len += (nla_total_size(0) + /* _A_STATS_GRP_HIST */ + nla_total_size(4) + /* _A_STATS_GRP_HIST_BKT_LOW */ + nla_total_size(4)) * /* _A_STATS_GRP_HIST_BKT_HI */ + ETHTOOL_RMON_HIST_MAX * 2; + } len += n_grps * (nla_total_size(0) + /* _A_STATS_GRP */ nla_total_size(4) + /* _A_STATS_GRP_ID */ @@ -258,6 +283,65 @@ static int stats_put_ctrl_stats(struct sk_buff *skb, return 0; } +static int stats_put_rmon_hist(struct sk_buff *skb, u32 attr, const u64 *hist, + const struct ethtool_rmon_hist_range *ranges) +{ + struct nlattr *nest; + int i; + + if (!ranges) + return 0; + + for (i = 0; i < ETHTOOL_RMON_HIST_MAX; i++) { + if (!ranges[i].low && !ranges[i].high) + break; + if (hist[i] == ETHTOOL_STAT_NOT_SET) + continue; + + nest = nla_nest_start(skb, attr); + if (!nest) + return -EMSGSIZE; + + if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_LOW, + ranges[i].low) || + nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_HI, + ranges[i].high) || + nla_put_u64_64bit(skb, ETHTOOL_A_STATS_GRP_HIST_VAL, + hist[i], ETHTOOL_A_STATS_GRP_PAD)) + goto err_cancel_hist; + + nla_nest_end(skb, nest); + } + + return 0; + +err_cancel_hist: + nla_nest_cancel(skb, nest); + return -EMSGSIZE; +} + +static int stats_put_rmon_stats(struct sk_buff *skb, + const struct stats_reply_data *data) +{ + if (stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_RX, + data->rmon_stats.hist, data->rmon_ranges) || + stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_TX, + data->rmon_stats.hist_tx, data->rmon_ranges)) + return -EMSGSIZE; + + if (stat_put(skb, ETHTOOL_A_STATS_RMON_UNDERSIZE, + data->rmon_stats.undersize_pkts) || + stat_put(skb, ETHTOOL_A_STATS_RMON_OVERSIZE, + data->rmon_stats.oversize_pkts) || + stat_put(skb, ETHTOOL_A_STATS_RMON_FRAG, + data->rmon_stats.fragments) || + stat_put(skb, ETHTOOL_A_STATS_RMON_JABBER, + data->rmon_stats.jabbers)) + return -EMSGSIZE; + + return 0; +} + static int stats_put_stats(struct sk_buff *skb, const struct stats_reply_data *data, u32 id, u32 ss_id, @@ -305,6 +389,9 @@ static int stats_fill_reply(struct sk_buff *skb, ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_CTRL, ETH_SS_STATS_ETH_CTRL, stats_put_ctrl_stats); + if (!ret && test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask)) + ret = stats_put_stats(skb, data, ETHTOOL_STATS_RMON, + ETH_SS_STATS_RMON, stats_put_rmon_stats); return ret; } diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c index a33c603a7a02..b3029fff715d 100644 --- a/net/ethtool/strset.c +++ b/net/ethtool/strset.c @@ -100,6 +100,11 @@ static const struct strset_info info_template[] = { .count = __ETHTOOL_A_STATS_ETH_CTRL_CNT, .strings = stats_eth_ctrl_names, }, + [ETH_SS_STATS_RMON] = { + .per_dev = false, + .count = __ETHTOOL_A_STATS_RMON_CNT, + .strings = stats_rmon_names, + }, }; struct strset_req_info {