From patchwork Tue Nov 22 10:41:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Machon X-Patchwork-Id: 13052183 X-Patchwork-Delegate: dsahern@gmail.com 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 7E42EC433FE for ; Tue, 22 Nov 2022 10:34:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233265AbiKVKeZ (ORCPT ); Tue, 22 Nov 2022 05:34:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233325AbiKVKd7 (ORCPT ); Tue, 22 Nov 2022 05:33:59 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE48028F for ; Tue, 22 Nov 2022 02:30:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1669113037; x=1700649037; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=f1JfnqAkR1YJ3QUjuxMrSq4rISnK7BKr9YdVxIUXKIc=; b=aK0CHqIKDvL1/S5+6xXp4Qx0lBVzh/ifjTRqcUFGKfuBxWPlHyGcDQeB 8+eU0bUxMOEHd8b/UvPF9mNCX4PuIZsxuqxKZBrV6Y9HUxKeKNESz9Urm PXehiCGgQ0pxeZSJFVSNOswiqOcOeXEeURoPBYW2czFn8hbtB0eXuo2R8 CoX1m6dqVyWl/rlM/v6eRSqNm+xDxmaJvfkKYigtWvNkJEF/ffJSe5Lbt Kioo0Tp/RyjKyp3fXwTjVpv+c54HmHWe1DshJPkye3Wltj+O03SQvkts/ Bg+VuIjrMnlbGek+Nc8kKTDSPC46QY5bHDJx6951hTVIme87sY7ahSGba A==; X-IronPort-AV: E=Sophos;i="5.96,183,1665471600"; d="scan'208";a="190066874" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 22 Nov 2022 03:30:37 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Tue, 22 Nov 2022 03:30:35 -0700 Received: from DEN-LT-70577.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Tue, 22 Nov 2022 03:30:34 -0700 From: Daniel Machon To: CC: , , , , , , Daniel Machon Subject: [PATCH iproute2-next 1/2] dcb: add new pcp-prio parameter to dcb app Date: Tue, 22 Nov 2022 11:41:11 +0100 Message-ID: <20221122104112.144293-2-daniel.machon@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221122104112.144293-1-daniel.machon@microchip.com> References: <20221122104112.144293-1-daniel.machon@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: dsahern@gmail.com Add new pcp-prio parameter to the app subcommand, which can be used to classify traffic based on PCP and DEI from the VLAN header. PCP and DEI is specified in a combination of numerical and symbolic form, where 'de' (as specified in the PCP Encoding Table, 802.1Q) means DEI=1. Map PCP 1 and DEI 0 to priority 1 $ dcb app add dev eth0 pcp-prio 1:1 Map PCP 1 and DEI 1 to priority 1 $ dcb app add dev eth0 pcp-prio 1de:1 Internally, PCP and DEI is encoded in the protocol field of the dcb_app struct. Each combination of PCP and DEI maps to a priority, thus needing a range of 0-15. A well formed dcb_app entry for PCP/DEI prioritization, could look like: struct dcb_app pcp = { .selector = DCB_APP_SEL_PCP, .priority = 7, .protocol = 15 } For mapping PCP=7 and DEI=1 to Prio=7. Also, two helper functions for translating between std and non-std APP selectors, have been added to dcb_app.c and exposed through dcb.h. Signed-off-by: Daniel Machon --- dcb/dcb.h | 3 + dcb/dcb_app.c | 138 +++++++++++++++++++++++++++++++++++++++++++-- man/man8/dcb-app.8 | 27 +++++++++ 3 files changed, 162 insertions(+), 6 deletions(-) diff --git a/dcb/dcb.h b/dcb/dcb.h index 244c3d3c30e3..05eddcbbcfdf 100644 --- a/dcb/dcb.h +++ b/dcb/dcb.h @@ -57,6 +57,9 @@ void dcb_print_array_kw(const __u8 *array, size_t array_size, /* dcb_app.c */ int dcb_cmd_app(struct dcb *dcb, int argc, char **argv); +enum ieee_attrs_app dcb_app_attr_type_get(__u8 selector); +bool dcb_app_attr_type_validate(enum ieee_attrs_app type); +bool dcb_app_selector_validate(enum ieee_attrs_app type, __u8 selector); /* dcb_buffer.c */ diff --git a/dcb/dcb_app.c b/dcb/dcb_app.c index dad34554017a..0d4a82e1e502 100644 --- a/dcb/dcb_app.c +++ b/dcb/dcb_app.c @@ -10,6 +10,16 @@ #include "utils.h" #include "rt_names.h" +static const char *const pcp_names[16] = { + "0", "1", "2", "3", "4", "5", "6", "7", + "0de", "1de", "2de", "3de", "4de", "5de", "6de", "7de" +}; + +static const char *const ieee_attrs_app_names[__DCB_ATTR_IEEE_APP_MAX] = { + [DCB_ATTR_IEEE_APP] = "DCB_ATTR_IEEE_APP", + [DCB_ATTR_DCB_APP] = "DCB_ATTR_DCB_APP" +}; + static void dcb_app_help_add(void) { fprintf(stderr, @@ -20,11 +30,13 @@ static void dcb_app_help_add(void) " [ dgram-port-prio PORT:PRIO ]\n" " [ port-prio PORT:PRIO ]\n" " [ dscp-prio INTEGER:PRIO ]\n" + " [ pcp-prio INTEGER:PRIO ]\n" "\n" " where PRIO := { 0 .. 7 }\n" " ET := { 0x600 .. 0xffff }\n" " PORT := { 1 .. 65535 }\n" " DSCP := { 0 .. 63 }\n" + " PCP := { 0(de) .. 7(de) }\n" "\n" ); } @@ -39,6 +51,7 @@ static void dcb_app_help_show_flush(void) " [ dgram-port-prio ]\n" " [ port-prio ]\n" " [ dscp-prio ]\n" + " [ pcp-prio ]\n" "\n" ); } @@ -58,6 +71,38 @@ struct dcb_app_table { size_t n_apps; }; +enum ieee_attrs_app dcb_app_attr_type_get(__u8 selector) +{ + switch (selector) { + case IEEE_8021QAZ_APP_SEL_ETHERTYPE: + case IEEE_8021QAZ_APP_SEL_STREAM: + case IEEE_8021QAZ_APP_SEL_DGRAM: + case IEEE_8021QAZ_APP_SEL_ANY: + case IEEE_8021QAZ_APP_SEL_DSCP: + return DCB_ATTR_IEEE_APP; + case DCB_APP_SEL_PCP: + return DCB_ATTR_DCB_APP; + default: + return DCB_ATTR_IEEE_APP_UNSPEC; + } +} + +bool dcb_app_attr_type_validate(enum ieee_attrs_app type) +{ + switch (type) { + case DCB_ATTR_IEEE_APP: + case DCB_ATTR_DCB_APP: + return true; + default: + return false; + } +} + +bool dcb_app_selector_validate(enum ieee_attrs_app type, __u8 selector) +{ + return dcb_app_attr_type_get(selector) == type; +} + static void dcb_app_table_fini(struct dcb_app_table *tab) { free(tab->apps); @@ -213,6 +258,32 @@ static int dcb_app_parse_mapping_ethtype_prio(__u32 key, char *value, void *data dcb_app_parse_mapping_cb, data); } +static int dcb_app_parse_pcp(__u32 *key, const char *arg) +{ + int ret, res; + + res = parse_one_of("pcp-names", arg, pcp_names, + ARRAY_SIZE(pcp_names), &ret); + if (ret < 0) + return ret; + + *key = res; + + return 0; +} + +static int dcb_app_parse_mapping_pcp_prio(__u32 key, char *value, void *data) +{ + __u8 prio; + + if (get_u8(&prio, value, 0)) + return -EINVAL; + + return dcb_parse_mapping("PCP", key, 15, + "PRIO", prio, IEEE_8021QAZ_MAX_TCS - 1, + dcb_app_parse_mapping_cb, data); +} + static int dcb_app_parse_dscp(__u32 *key, const char *arg) { if (parse_mapping_num_all(key, arg) == 0) @@ -309,6 +380,11 @@ static bool dcb_app_is_dscp(const struct dcb_app *app) return app->selector == IEEE_8021QAZ_APP_SEL_DSCP; } +static bool dcb_app_is_pcp(const struct dcb_app *app) +{ + return app->selector == DCB_APP_SEL_PCP; +} + static bool dcb_app_is_stream_port(const struct dcb_app *app) { return app->selector == IEEE_8021QAZ_APP_SEL_STREAM; @@ -344,6 +420,17 @@ static int dcb_app_print_key_dscp(__u16 protocol) return print_uint(PRINT_ANY, NULL, "%d:", protocol); } +static int dcb_app_print_key_pcp(__u16 protocol) +{ + /* Print in numerical form, if protocol value is out-of-range */ + if (protocol > 15) { + fprintf(stderr, "Unknown PCP key: %d\n", protocol); + return print_uint(PRINT_ANY, NULL, "%d:", protocol); + } + + return print_string(PRINT_ANY, NULL, "%s:", pcp_names[protocol]); +} + static void dcb_app_print_filtered(const struct dcb_app_table *tab, bool (*filter)(const struct dcb_app *), int (*print_key)(__u16 protocol), @@ -382,6 +469,15 @@ static void dcb_app_print_ethtype_prio(const struct dcb_app_table *tab) "ethtype_prio", "ethtype-prio"); } +static void dcb_app_print_pcp_prio(const struct dcb *dcb, + const struct dcb_app_table *tab) +{ + dcb_app_print_filtered(tab, dcb_app_is_pcp, + dcb->numeric ? dcb_app_print_key_dec + : dcb_app_print_key_pcp, + "pcp_prio", "pcp-prio"); +} + static void dcb_app_print_dscp_prio(const struct dcb *dcb, const struct dcb_app_table *tab) { @@ -439,26 +535,41 @@ static void dcb_app_print(const struct dcb *dcb, const struct dcb_app_table *tab dcb_app_print_stream_port_prio(tab); dcb_app_print_dgram_port_prio(tab); dcb_app_print_port_prio(tab); + dcb_app_print_pcp_prio(dcb, tab); } static int dcb_app_get_table_attr_cb(const struct nlattr *attr, void *data) { struct dcb_app_table *tab = data; struct dcb_app *app; + uint16_t type; int ret; - if (mnl_attr_get_type(attr) != DCB_ATTR_IEEE_APP) { - fprintf(stderr, "Unknown attribute in DCB_ATTR_IEEE_APP_TABLE: %d\n", - mnl_attr_get_type(attr)); + type = mnl_attr_get_type(attr); + + if (!dcb_app_attr_type_validate(type)) { + fprintf(stderr, + "Unknown attribute in DCB_ATTR_IEEE_APP_TABLE: %d\n", + type); return MNL_CB_OK; } if (mnl_attr_get_payload_len(attr) < sizeof(struct dcb_app)) { - fprintf(stderr, "DCB_ATTR_IEEE_APP payload expected to have size %zd, not %d\n", - sizeof(struct dcb_app), mnl_attr_get_payload_len(attr)); + fprintf(stderr, + "%s payload expected to have size %zd, not %d\n", + ieee_attrs_app_names[type], sizeof(struct dcb_app), + mnl_attr_get_payload_len(attr)); return MNL_CB_OK; } app = mnl_attr_get_payload(attr); + + /* Check that selector is encapsulated in the right attribute */ + if (!dcb_app_selector_validate(type, app->selector)) { + fprintf(stderr, "Wrong selector for type: %s\n", + ieee_attrs_app_names[type]); + return MNL_CB_OK; + } + ret = dcb_app_table_push(tab, app); if (ret != 0) return MNL_CB_ERROR; @@ -491,6 +602,7 @@ struct dcb_app_add_del { static int dcb_app_add_del_cb(struct dcb *dcb, struct nlmsghdr *nlh, void *data) { struct dcb_app_add_del *add_del = data; + enum ieee_attrs_app type; struct nlattr *nest; size_t i; @@ -498,9 +610,10 @@ static int dcb_app_add_del_cb(struct dcb *dcb, struct nlmsghdr *nlh, void *data) for (i = 0; i < add_del->tab->n_apps; i++) { const struct dcb_app *app = &add_del->tab->apps[i]; + type = dcb_app_attr_type_get(app->selector); if (add_del->filter == NULL || add_del->filter(app)) - mnl_attr_put(nlh, DCB_ATTR_IEEE_APP, sizeof(*app), app); + mnl_attr_put(nlh, type, sizeof(*app), app); } mnl_attr_nest_end(nlh, nest); @@ -577,6 +690,12 @@ static int dcb_cmd_app_parse_add_del(struct dcb *dcb, const char *dev, ret = parse_mapping(&argc, &argv, false, &dcb_app_parse_mapping_port_prio, &pm); + } else if (strcmp(*argv, "pcp-prio") == 0) { + NEXT_ARG(); + pm.selector = DCB_APP_SEL_PCP; + ret = parse_mapping_gen(&argc, &argv, &dcb_app_parse_pcp, + &dcb_app_parse_mapping_pcp_prio, + &pm); } else { fprintf(stderr, "What is \"%s\"?\n", *argv); dcb_app_help_add(); @@ -656,6 +775,8 @@ static int dcb_cmd_app_show(struct dcb *dcb, const char *dev, int argc, char **a dcb_app_print_port_prio(&tab); } else if (matches(*argv, "default-prio") == 0) { dcb_app_print_default_prio(&tab); + } else if (strcmp(*argv, "pcp-prio") == 0) { + dcb_app_print_pcp_prio(dcb, &tab); } else { fprintf(stderr, "What is \"%s\"?\n", *argv); dcb_app_help_show_flush(); @@ -705,6 +826,11 @@ static int dcb_cmd_app_flush(struct dcb *dcb, const char *dev, int argc, char ** &dcb_app_is_dscp); if (ret != 0) goto out; + } else if (strcmp(*argv, "pcp-prio") == 0) { + ret = dcb_app_add_del(dcb, dev, DCB_CMD_IEEE_DEL, &tab, + &dcb_app_is_pcp); + if (ret != 0) + goto out; } else { fprintf(stderr, "What is \"%s\"?\n", *argv); dcb_app_help_show_flush(); diff --git a/man/man8/dcb-app.8 b/man/man8/dcb-app.8 index 9780fe4b60fa..054ba9801d81 100644 --- a/man/man8/dcb-app.8 +++ b/man/man8/dcb-app.8 @@ -23,6 +23,7 @@ the DCB (Data Center Bridging) subsystem .RB "[ " dgram-port-prio " ]" .RB "[ " port-prio " ]" .RB "[ " dscp-prio " ]" +.RB "[ " pcp-prio " ]" .ti -8 .B dcb ets " { " add " | " del " | " replace " } " dev @@ -33,6 +34,7 @@ the DCB (Data Center Bridging) subsystem .RB "[ " dgram-port-prio " " \fIPORT-MAP\fB " ]" .RB "[ " port-prio " " \fIPORT-MAP\fB " ]" .RB "[ " dscp-prio " " \fIDSCP-MAP\fB " ]" +.RB "[ " pcp-prio " " \fIPCP-MAP\fB " ]" .ti -8 .IR PRIO-LIST " := [ " PRIO-LIST " ] " PRIO @@ -64,6 +66,9 @@ the DCB (Data Center Bridging) subsystem .ti -8 .IR DSCP " := { " \fB0\fR " .. " \fB63\fR " }" +.ti -8 +.IR PCP " := { " \fB0\fR " .. " \fB7\fR " }" + .ti -8 .IR PRIO " := { " \fB0\fR " .. " \fB7\fR " }" @@ -182,6 +187,18 @@ command line option .B -N turns the show translation off. +.TP +.B pcp-prio \fIPCP-MAP +\fIPCP-MAP\fR uses the array parameter syntax, see +.BR dcb (8) +for details. Keys are PCP/DEI values. Values are priorities assigned to traffic +with matching PCP and DEI. PCP/DEI values are written as a combination of +numeric- and symbolic values, to accommodate for both PCP and DEI. PCP always +in numerical form e.g 1 .. 7 and DEI in symbolic form e.g 'de', indicating that +the DEI bit is 1. In combination 2de:1 translates to a mapping of PCP=2 and +DEI=1 to priority 1. In a hardware offloaded context, the DEI bit can be mapped +directly to drop-precedence (DP) by the driver. + .SH EXAMPLE & USAGE Prioritize traffic with DSCP 0 to priority 0, 24 to 3 and 48 to 6: @@ -221,6 +238,16 @@ Flush all DSCP rules: .br (nothing) +Add a rule to map traffic with PCP 1 and DEI 0 to priority 1 and PCP 2 and DEI 1 +to priority 2: + +.P +# dcb app add dev eth0 pcp-prio 1:1 2de:2 +.br +# dcb app show dev eth0 pcp-prio +.br +pcp-prio 1:1 2de:2 + .SH EXIT STATUS Exit status is 0 if command was successful or a positive integer upon failure.