From patchwork Wed Dec 14 23:54:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Mogilappagari, Sudheer" X-Patchwork-Id: 13073813 X-Patchwork-Delegate: mkubecek+ethtool@suse.cz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAFA1C4332F for ; Thu, 15 Dec 2022 00:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230089AbiLOAGK (ORCPT ); Wed, 14 Dec 2022 19:06:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230124AbiLOAFb (ORCPT ); Wed, 14 Dec 2022 19:05:31 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B19F36B991 for ; Wed, 14 Dec 2022 15:58:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1671062297; x=1702598297; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=NqUcjvoPCz7Brbj36DpxXqGQWysHjoz5KI1pG/OJr3g=; b=dtoziMyh6nt0yPEAypcBqC2oExCcNu8aF9mRB8jE/XjPnUugQe/hP9fx /MHXEESJeQmTlHBa6dTewOIE9IZoki0mYkl8+h3qC3FME1bhuje8pYphh 4AVItf6/f651GFl2bAuQ+kmxymUmd30lPi7QTbYOm7alZpVlOuNVjTNmF raUxjhXWx1y9ctsngYm1xRA/0cIQ6HVEpFqRJeTYDxlVXKprNbCGZHpeL rEIqzDdaqqQnRl2FXxhSZSPurOhntWdzB+G75JCIS12o6J2cS/flSE7Ou yMQpLcwH2OWR5mOXjr3SLbbSf/Txb/Y4vhqwHkwKiz12Frj7tlvczCWUL Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10561"; a="301951809" X-IronPort-AV: E=Sophos;i="5.96,245,1665471600"; d="scan'208";a="301951809" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Dec 2022 15:57:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10561"; a="773503930" X-IronPort-AV: E=Sophos;i="5.96,245,1665471600"; d="scan'208";a="773503930" Received: from msu-dell.jf.intel.com ([10.166.233.5]) by orsmga004.jf.intel.com with ESMTP; 14 Dec 2022 15:57:25 -0800 From: Sudheer Mogilappagari To: netdev@vger.kernel.org Cc: mkubecek@suse.cz, kuba@kernel.org, sridhar.samudrala@intel.com, anthony.l.nguyen@intel.com Subject: [PATCH ethtool-next v1 3/3] netlink: add netlink handler for get rss (-x) Date: Wed, 14 Dec 2022 15:54:18 -0800 Message-Id: <20221214235418.1033834-4-sudheer.mogilappagari@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221214235418.1033834-1-sudheer.mogilappagari@intel.com> References: <20221214235418.1033834-1-sudheer.mogilappagari@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: mkubecek+ethtool@suse.cz Add support for netlink based "ethtool -x " command using ETHTOOL_MSG_RSS_GET netlink message. It implements same functionality provided by traditional ETHTOOL_GRSSH subcommand. This displays RSS table, hash key and hash function. Signed-off-by: Sudheer Mogilappagari --- Makefile.am | 2 +- ethtool.c | 1 + netlink/desc-ethtool.c | 11 +++ netlink/extapi.h | 2 + netlink/rss.c | 197 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 212 insertions(+), 1 deletion(-) create mode 100644 netlink/rss.c diff --git a/Makefile.am b/Makefile.am index fcc912e..4765c3f 100644 --- a/Makefile.am +++ b/Makefile.am @@ -39,7 +39,7 @@ ethtool_SOURCES += \ netlink/eee.c netlink/tsinfo.c netlink/fec.c \ netlink/stats.c \ netlink/desc-ethtool.c netlink/desc-genlctrl.c \ - netlink/module-eeprom.c netlink/module.c \ + netlink/module-eeprom.c netlink/module.c netlink/rss.c \ netlink/desc-rtnl.c netlink/cable_test.c netlink/tunnels.c \ uapi/linux/ethtool_netlink.h \ uapi/linux/netlink.h uapi/linux/genetlink.h \ diff --git a/ethtool.c b/ethtool.c index 0971074..af57807 100644 --- a/ethtool.c +++ b/ethtool.c @@ -5830,6 +5830,7 @@ static const struct option args[] = { { .opts = "-x|--show-rxfh-indir|--show-rxfh", .func = do_grxfh, + .nlfunc = nl_grss, .help = "Show Rx flow hash indirection table and/or RSS hash key", .xhelp = " [ context %d ]\n" }, diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c index 9a6651e..8783afc 100644 --- a/netlink/desc-ethtool.c +++ b/netlink/desc-ethtool.c @@ -409,6 +409,15 @@ static const struct pretty_nla_desc __module_desc[] = { NLATTR_DESC_U8(ETHTOOL_A_MODULE_POWER_MODE), }; +static const struct pretty_nla_desc __rss_desc[] = { + NLATTR_DESC_INVALID(ETHTOOL_A_MODULE_UNSPEC), + NLATTR_DESC_NESTED(ETHTOOL_A_MODULE_HEADER, header), + NLATTR_DESC_U32(ETHTOOL_A_RSS_CONTEXT), + NLATTR_DESC_U32(ETHTOOL_A_RSS_HFUNC), + NLATTR_DESC_BINARY(ETHTOOL_A_RSS_INDIR), + NLATTR_DESC_BINARY(ETHTOOL_A_RSS_HKEY), +}; + const struct pretty_nlmsg_desc ethnl_umsg_desc[] = { NLMSG_DESC_INVALID(ETHTOOL_MSG_USER_NONE), NLMSG_DESC(ETHTOOL_MSG_STRSET_GET, strset), @@ -446,6 +455,7 @@ const struct pretty_nlmsg_desc ethnl_umsg_desc[] = { NLMSG_DESC(ETHTOOL_MSG_PHC_VCLOCKS_GET, phc_vclocks), NLMSG_DESC(ETHTOOL_MSG_MODULE_GET, module), NLMSG_DESC(ETHTOOL_MSG_MODULE_SET, module), + NLMSG_DESC(ETHTOOL_MSG_RSS_GET, rss), }; const unsigned int ethnl_umsg_n_desc = ARRAY_SIZE(ethnl_umsg_desc); @@ -488,6 +498,7 @@ const struct pretty_nlmsg_desc ethnl_kmsg_desc[] = { NLMSG_DESC(ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY, phc_vclocks), NLMSG_DESC(ETHTOOL_MSG_MODULE_GET_REPLY, module), NLMSG_DESC(ETHTOOL_MSG_MODULE_NTF, module), + NLMSG_DESC(ETHTOOL_MSG_RSS_GET_REPLY, rss), }; const unsigned int ethnl_kmsg_n_desc = ARRAY_SIZE(ethnl_kmsg_desc); diff --git a/netlink/extapi.h b/netlink/extapi.h index 1bb580a..9b6dd1a 100644 --- a/netlink/extapi.h +++ b/netlink/extapi.h @@ -47,6 +47,7 @@ int nl_gmodule(struct cmd_context *ctx); int nl_smodule(struct cmd_context *ctx); int nl_monitor(struct cmd_context *ctx); int nl_getmodule(struct cmd_context *ctx); +int nl_grss(struct cmd_context *ctx); void nl_monitor_usage(void); @@ -114,6 +115,7 @@ nl_get_eeprom_page(struct cmd_context *ctx __maybe_unused, #define nl_getmodule NULL #define nl_gmodule NULL #define nl_smodule NULL +#define nl_grss NULL #endif /* ETHTOOL_ENABLE_NETLINK */ diff --git a/netlink/rss.c b/netlink/rss.c new file mode 100644 index 0000000..256f688 --- /dev/null +++ b/netlink/rss.c @@ -0,0 +1,197 @@ +/* + * rss.c - netlink implementation of RSS context commands + * + * Implementation of "ethtool -x " + */ + +#include +#include +#include + +#include "../internal.h" +#include "../common.h" +#include "netlink.h" +#include "strset.h" +#include "parser.h" + +struct cb_args { + struct nl_context *nlctx; + u32 num_rings; +}; + +int rss_reply_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_RSS_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + struct cb_args *args = data; + struct nl_context *nlctx = args->nlctx; + const struct stringset *hash_funcs; + u32 rss_config_size, rss_hfunc; + const char *rss_config, *hkey; + int indir_sz = 0, hkey_sz = 0; + struct ethtool_rxfh *rss; + bool silent; + int err_ret; + int ret; + + silent = nlctx->is_dump || nlctx->is_monitor; + err_ret = silent ? MNL_CB_OK : MNL_CB_ERROR; + ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info); + if (ret < 0) + return err_ret; + nlctx->devname = get_dev_name(tb[ETHTOOL_A_RSS_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + if (silent) + putchar('\n'); + + rss_hfunc = mnl_attr_get_u32(tb[ETHTOOL_A_RSS_HFUNC]); + + indir_sz = mnl_attr_get_payload_len(tb[ETHTOOL_A_RSS_INDIR]); + rss_config = mnl_attr_get_str(tb[ETHTOOL_A_RSS_INDIR]); + + hkey_sz = mnl_attr_get_payload_len(tb[ETHTOOL_A_RSS_HKEY]); + hkey = mnl_attr_get_str(tb[ETHTOOL_A_RSS_HKEY]); + + rss_config_size = indir_sz + hkey_sz; + + rss = calloc(1, sizeof(*rss) + rss_config_size); + if (!rss) { + perror("Cannot allocate memory for RX flow hash config"); + return 1; + } + + rss->indir_size = indir_sz / sizeof(u32); + rss->key_size = hkey_sz; + + memcpy(rss->rss_config, rss_config, indir_sz); + memcpy(rss->rss_config + rss->indir_size, hkey, hkey_sz); + + print_rss_info(nlctx->ctx, args->num_rings, rss); + + /* Fetch RSS hash functions and their status and print */ + printf("RSS hash function:\n"); + if (!rss_hfunc) { + printf(" Operation not supported\n"); + return 0; + } + + if (!nlctx->is_monitor) { + ret = netlink_init_ethnl2_socket(nlctx); + if (ret < 0) + return MNL_CB_ERROR; + } + hash_funcs = global_stringset(ETH_SS_RSS_HASH_FUNCS, + nlctx->ethnl2_socket); + + ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info); + if (ret < 0) + return silent ? MNL_CB_OK : MNL_CB_ERROR; + nlctx->devname = get_dev_name(tb[ETHTOOL_A_RSS_HEADER]); + if (!dev_ok(nlctx)) + return MNL_CB_OK; + + for (unsigned int i = 0; i < get_count(hash_funcs); i++) + printf(" %s: %s\n", get_string(hash_funcs, i), + (rss_hfunc & (1 << i)) ? "on" : "off"); + + free(rss); + return MNL_CB_OK; +} + +/* RSS_GET */ +static const struct param_parser grss_params[] = { + { + .arg = "context", + .type = ETHTOOL_A_RSS_CONTEXT, + .handler = nl_parse_direct_u32, + .min_argc = 1, + }, + {} +}; + +int get_channels_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_CHANNELS_MAX + 1] = {}; + DECLARE_ATTR_TB_INFO(tb); + struct cb_args *args = data; + struct nl_context *nlctx = args->nlctx; + bool silent; + int err_ret; + int ret; + + silent = nlctx->is_dump || nlctx->is_monitor; + err_ret = silent ? MNL_CB_OK : MNL_CB_ERROR; + ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info); + if (ret < 0) + return err_ret; + nlctx->devname = get_dev_name(tb[ETHTOOL_A_CHANNELS_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + args->num_rings = mnl_attr_get_u8(tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT]); + return MNL_CB_OK; +} + +int nl_grss(struct cmd_context *ctx) +{ + struct nl_context *nlctx = ctx->nlctx; + struct nl_socket *nlsk = nlctx->ethnl_socket; + struct nl_msg_buff *msgbuff; + struct cb_args args; + int ret; + + nlctx->cmd = "-x"; + nlctx->argp = ctx->argp; + nlctx->argc = ctx->argc; + nlctx->devname = ctx->devname; + nlsk = nlctx->ethnl_socket; + msgbuff = &nlsk->msgbuff; + + if (netlink_cmd_check(ctx, ETHTOOL_MSG_RSS_GET, true)) + return -EOPNOTSUPP; + + /* save rings information into args.num_rings */ + if (netlink_cmd_check(ctx, ETHTOOL_MSG_CHANNELS_GET, true)) + return -EOPNOTSUPP; + + ret = nlsock_prep_get_request(nlsk, ETHTOOL_MSG_CHANNELS_GET, + ETHTOOL_A_CHANNELS_HEADER, 0); + if (ret < 0) + goto err; + + ret = nlsock_sendmsg(nlsk, NULL); + if (ret < 0) + goto err; + + args.nlctx = nlsk->nlctx; + ret = nlsock_process_reply(nlsk, get_channels_cb, &args); + if (ret < 0) + goto err; + + ret = msg_init(nlctx, msgbuff, ETHTOOL_MSG_RSS_GET, + NLM_F_REQUEST | NLM_F_ACK); + if (ret < 0) + return 1; + if (ethnla_fill_header(msgbuff, ETHTOOL_A_RSS_HEADER, + ctx->devname, 0)) + return -EMSGSIZE; + + ret = nl_parser(nlctx, grss_params, NULL, PARSER_GROUP_NONE, NULL); + if (ret < 0) + goto err; + + ret = nlsock_sendmsg(nlsk, NULL); + if (ret < 0) + goto err; + + args.nlctx = nlctx; + ret = nlsock_process_reply(nlsk, rss_reply_cb, &args); + if (ret == 0) + return 0; + +err: + return nlctx->exit_code ?: 1; +} +