--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <errno.h>
+#include <stdio.h>
+#include <linux/dcbnl.h>
+
+#include "dcb.h"
+#include "utils.h"
+
+static void dcb_ets_help_set(void)
+{
+ fprintf(stderr,
+ "Usage: dcb ets set dev STRING\n"
+ " [ willing { on | off } ]\n"
+ " [ { tc-tsa | reco-tc-tsa } TSA-MAP ]\n"
+ " [ { pg-bw | tc-bw | reco-tc-bw } BW-MAP ]\n"
+ " [ { prio-tc | reco-prio-tc } PRIO-MAP ]\n"
+ "\n"
+ " where TSA-MAP := [ TSA-MAP ] TSA-MAPPING\n"
+ " TSA-MAPPING := { all | TC }:{ strict | cbs | ets | vendor }\n"
+ " BW-MAP := [ BW-MAP ] BW-MAPPING\n"
+ " BW-MAPPING := { all | TC }:INTEGER\n"
+ " PRIO-MAP := [ PRIO-MAP ] PRIO-MAPPING\n"
+ " PRIO-MAPPING := { all | PRIO }:TC\n"
+ " TC := { 0 .. 7 }\n"
+ " PRIO := { 0 .. 7 }\n"
+ "\n"
+ );
+}
+
+static void dcb_ets_help_show(void)
+{
+ fprintf(stderr,
+ "Usage: dcb ets show dev STRING\n"
+ " [ willing | ets-cap | cbs | tc-tsa | reco-tc-tsa |\n"
+ " pg-bw | tc-bw | reco-tc-bw | prio-tc |\n"
+ " reco-prio-tc ]\n"
+ "\n"
+ );
+}
+
+static void dcb_ets_help(void)
+{
+ fprintf(stderr,
+ "Usage: dcb ets help\n"
+ "\n"
+ );
+ dcb_ets_help_show();
+ dcb_ets_help_set();
+}
+
+static const char *const tsa_names[] = {
+ [IEEE_8021QAZ_TSA_STRICT] = "strict",
+ [IEEE_8021QAZ_TSA_CB_SHAPER] = "cbs",
+ [IEEE_8021QAZ_TSA_ETS] = "ets",
+ [IEEE_8021QAZ_TSA_VENDOR] = "vendor",
+};
+
+static int dcb_ets_parse_mapping_tc_tsa(__u32 key, char *value, void *data)
+{
+ __u8 tsa;
+ int ret;
+
+ tsa = parse_one_of("TSA", value, tsa_names, ARRAY_SIZE(tsa_names), &ret);
+ if (ret)
+ return ret;
+
+ return dcb_parse_mapping("TC", key, IEEE_8021QAZ_MAX_TCS - 1,
+ "TSA", tsa, -1U,
+ dcb_set_u8, data);
+}
+
+static int dcb_ets_parse_mapping_tc_bw(__u32 key, char *value, void *data)
+{
+ __u8 bw;
+
+ if (get_u8(&bw, value, 0))
+ return -EINVAL;
+
+ return dcb_parse_mapping("TC", key, IEEE_8021QAZ_MAX_TCS - 1,
+ "BW", bw, 100,
+ dcb_set_u8, data);
+}
+
+static int dcb_ets_parse_mapping_prio_tc(unsigned int key, char *value, void *data)
+{
+ __u8 tc;
+
+ if (get_u8(&tc, value, 0))
+ return -EINVAL;
+
+ return dcb_parse_mapping("PRIO", key, IEEE_8021QAZ_MAX_TCS - 1,
+ "TC", tc, IEEE_8021QAZ_MAX_TCS - 1,
+ dcb_set_u8, data);
+}
+
+static void dcb_print_array_tsa(const __u8 *array, size_t size)
+{
+ dcb_print_array_kw(array, size, tsa_names, ARRAY_SIZE(tsa_names));
+}
+
+static void dcb_ets_print_willing(const struct ieee_ets *ets)
+{
+ print_on_off(PRINT_ANY, "willing", "willing %s ", ets->willing);
+}
+
+static void dcb_ets_print_ets_cap(const struct ieee_ets *ets)
+{
+ print_uint(PRINT_ANY, "ets_cap", "ets-cap %d ", ets->ets_cap);
+}
+
+static void dcb_ets_print_cbs(const struct ieee_ets *ets)
+{
+ print_on_off(PRINT_ANY, "cbs", "cbs %s ", ets->cbs);
+}
+
+static void dcb_ets_print_tc_bw(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("tc_bw", "tc-bw",
+ ets->tc_tx_bw, ARRAY_SIZE(ets->tc_tx_bw),
+ dcb_print_array_u8);
+}
+
+static void dcb_ets_print_pg_bw(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("pg_bw", "pg-bw",
+ ets->tc_rx_bw, ARRAY_SIZE(ets->tc_rx_bw),
+ dcb_print_array_u8);
+}
+
+static void dcb_ets_print_tc_tsa(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("tc_tsa", "tc-tsa",
+ ets->tc_tsa, ARRAY_SIZE(ets->tc_tsa),
+ dcb_print_array_tsa);
+}
+
+static void dcb_ets_print_prio_tc(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("prio_tc", "prio-tc",
+ ets->prio_tc, ARRAY_SIZE(ets->prio_tc),
+ dcb_print_array_u8);
+}
+
+static void dcb_ets_print_reco_tc_bw(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("reco_tc_bw", "reco-tc-bw",
+ ets->tc_reco_bw, ARRAY_SIZE(ets->tc_reco_bw),
+ dcb_print_array_u8);
+}
+
+static void dcb_ets_print_reco_tc_tsa(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("reco_tc_tsa", "reco-tc-tsa",
+ ets->tc_reco_tsa, ARRAY_SIZE(ets->tc_reco_tsa),
+ dcb_print_array_tsa);
+}
+
+static void dcb_ets_print_reco_prio_tc(const struct ieee_ets *ets)
+{
+ dcb_print_named_array("reco_prio_tc", "reco-prio-tc",
+ ets->reco_prio_tc, ARRAY_SIZE(ets->reco_prio_tc),
+ dcb_print_array_u8);
+}
+
+static void dcb_ets_print(const struct ieee_ets *ets)
+{
+ dcb_ets_print_willing(ets);
+ dcb_ets_print_ets_cap(ets);
+ dcb_ets_print_cbs(ets);
+ print_nl();
+
+ dcb_ets_print_tc_bw(ets);
+ print_nl();
+
+ dcb_ets_print_pg_bw(ets);
+ print_nl();
+
+ dcb_ets_print_tc_tsa(ets);
+ print_nl();
+
+ dcb_ets_print_prio_tc(ets);
+ print_nl();
+
+ dcb_ets_print_reco_tc_bw(ets);
+ print_nl();
+
+ dcb_ets_print_reco_tc_tsa(ets);
+ print_nl();
+
+ dcb_ets_print_reco_prio_tc(ets);
+ print_nl();
+}
+
+static int dcb_ets_get(struct dcb *dcb, const char *dev, struct ieee_ets *ets)
+{
+ return dcb_get_attribute(dcb, dev, DCB_ATTR_IEEE_ETS, ets, sizeof(*ets));
+}
+
+static int dcb_ets_validate_bw(const __u8 bw[], const __u8 tsa[], const char *what)
+{
+ bool has_ets = false;
+ unsigned int total = 0;
+ unsigned int tc;
+
+ for (tc = 0; tc < IEEE_8021QAZ_MAX_TCS; tc++) {
+ if (tsa[tc] == IEEE_8021QAZ_TSA_ETS) {
+ has_ets = true;
+ break;
+ }
+ }
+
+ /* TC bandwidth is only intended for ETS, but 802.1Q-2018 only requires
+ * that the sum be 100, and individual entries 0..100. It explicitly
+ * notes that non-ETS TCs can have non-0 TC bandwidth during
+ * reconfiguration.
+ */
+ for (tc = 0; tc < IEEE_8021QAZ_MAX_TCS; tc++) {
+ if (bw[tc] > 100) {
+ fprintf(stderr, "%d%% for TC %d of %s is not a valid bandwidth percentage, expected 0..100%%\n",
+ bw[tc], tc, what);
+ return -EINVAL;
+ }
+ total += bw[tc];
+ }
+
+ /* This is what 802.1Q-2018 requires. */
+ if (total == 100)
+ return 0;
+
+ /* But this requirement does not make sense for all-strict
+ * configurations. Anything else than 0 does not make sense: either BW
+ * has not been reconfigured for the all-strict allocation yet, at which
+ * point we expect sum of 100. Or it has already been reconfigured, at
+ * which point accept 0.
+ */
+ if (!has_ets && total == 0)
+ return 0;
+
+ fprintf(stderr, "Bandwidth percentages in %s sum to %d%%, expected %d%%\n",
+ what, total, has_ets ? 100 : 0);
+ return -EINVAL;
+}
+
+static int dcb_ets_set(struct dcb *dcb, const char *dev, const struct ieee_ets *ets)
+{
+ /* Do not validate pg-bw, which is not standard and has unclear
+ * meaning.
+ */
+ if (dcb_ets_validate_bw(ets->tc_tx_bw, ets->tc_tsa, "tc-bw") ||
+ dcb_ets_validate_bw(ets->tc_reco_bw, ets->tc_reco_tsa, "reco-tc-bw"))
+ return -EINVAL;
+
+ return dcb_set_attribute(dcb, dev, DCB_ATTR_IEEE_ETS, ets, sizeof(*ets));
+}
+
+static int dcb_cmd_ets_set(struct dcb *dcb, const char *dev, int argc, char **argv)
+{
+ struct ieee_ets ets;
+ int ret;
+
+ if (!argc) {
+ dcb_ets_help_set();
+ return 1;
+ }
+
+ ret = dcb_ets_get(dcb, dev, &ets);
+ if (ret)
+ return ret;
+
+ do {
+ if (matches(*argv, "help") == 0) {
+ dcb_ets_help_set();
+ return 0;
+ } else if (matches(*argv, "willing") == 0) {
+ NEXT_ARG();
+ ets.willing = parse_on_off("willing", *argv, &ret);
+ if (ret)
+ return ret;
+ } else if (matches(*argv, "tc-tsa") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_tc_tsa,
+ ets.tc_tsa);
+ if (ret) {
+ fprintf(stderr, "Invalid tc-tsa mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "reco-tc-tsa") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_tc_tsa,
+ ets.tc_reco_tsa);
+ if (ret) {
+ fprintf(stderr, "Invalid reco-tc-tsa mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "tc-bw") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_tc_bw,
+ ets.tc_tx_bw);
+ if (ret) {
+ fprintf(stderr, "Invalid tc-bw mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "pg-bw") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_tc_bw,
+ ets.tc_rx_bw);
+ if (ret) {
+ fprintf(stderr, "Invalid pg-bw mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "reco-tc-bw") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_tc_bw,
+ ets.tc_reco_bw);
+ if (ret) {
+ fprintf(stderr, "Invalid reco-tc-bw mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "prio-tc") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_prio_tc,
+ ets.prio_tc);
+ if (ret) {
+ fprintf(stderr, "Invalid prio-tc mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else if (matches(*argv, "reco-prio-tc") == 0) {
+ NEXT_ARG();
+ ret = parse_mapping(&argc, &argv, true, &dcb_ets_parse_mapping_prio_tc,
+ ets.reco_prio_tc);
+ if (ret) {
+ fprintf(stderr, "Invalid reco-prio-tc mapping %s\n", *argv);
+ return ret;
+ }
+ continue;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_ets_help_set();
+ return -EINVAL;
+ }
+
+ NEXT_ARG_FWD();
+ } while (argc > 0);
+
+ return dcb_ets_set(dcb, dev, &ets);
+}
+
+static int dcb_cmd_ets_show(struct dcb *dcb, const char *dev, int argc, char **argv)
+{
+ struct ieee_ets ets;
+ int ret;
+
+ ret = dcb_ets_get(dcb, dev, &ets);
+ if (ret)
+ return ret;
+
+ open_json_object(NULL);
+
+ if (!argc) {
+ dcb_ets_print(&ets);
+ goto out;
+ }
+
+ do {
+ if (matches(*argv, "help") == 0) {
+ dcb_ets_help();
+ return 0;
+ } else if (matches(*argv, "willing") == 0) {
+ dcb_ets_print_willing(&ets);
+ print_nl();
+ } else if (matches(*argv, "ets-cap") == 0) {
+ dcb_ets_print_ets_cap(&ets);
+ print_nl();
+ } else if (matches(*argv, "cbs") == 0) {
+ dcb_ets_print_cbs(&ets);
+ print_nl();
+ } else if (matches(*argv, "tc-tsa") == 0) {
+ dcb_ets_print_tc_tsa(&ets);
+ print_nl();
+ } else if (matches(*argv, "reco-tc-tsa") == 0) {
+ dcb_ets_print_reco_tc_tsa(&ets);
+ print_nl();
+ } else if (matches(*argv, "tc-bw") == 0) {
+ dcb_ets_print_tc_bw(&ets);
+ print_nl();
+ } else if (matches(*argv, "pg-bw") == 0) {
+ dcb_ets_print_pg_bw(&ets);
+ print_nl();
+ } else if (matches(*argv, "reco-tc-bw") == 0) {
+ dcb_ets_print_reco_tc_bw(&ets);
+ print_nl();
+ } else if (matches(*argv, "prio-tc") == 0) {
+ dcb_ets_print_prio_tc(&ets);
+ print_nl();
+ } else if (matches(*argv, "reco-prio-tc") == 0) {
+ dcb_ets_print_reco_prio_tc(&ets);
+ print_nl();
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_ets_help();
+ return -EINVAL;
+ }
+
+ NEXT_ARG_FWD();
+ } while (argc > 0);
+
+out:
+ close_json_object();
+ return 0;
+}
+
+int dcb_cmd_ets(struct dcb *dcb, int argc, char **argv)
+{
+ if (!argc || matches(*argv, "help") == 0) {
+ dcb_ets_help();
+ return 0;
+ } else if (matches(*argv, "show") == 0) {
+ NEXT_ARG_FWD();
+ return dcb_cmd_parse_dev(dcb, argc, argv, dcb_cmd_ets_show, dcb_ets_help_show);
+ } else if (matches(*argv, "set") == 0) {
+ NEXT_ARG_FWD();
+ return dcb_cmd_parse_dev(dcb, argc, argv, dcb_cmd_ets_set, dcb_ets_help_set);
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ dcb_ets_help();
+ return -EINVAL;
+ }
+}
--- /dev/null
+.TH DCB-ETS 8 "19 October 2020" "iproute2" "Linux"
+.SH NAME
+dcb-ets \- show / manipulate ETS (Enhanced Transmission Selection) settings of
+the DCB (Data Center Bridging) subsystem
+.SH SYNOPSIS
+.sp
+.ad l
+.in +8
+
+.ti -8
+.B dcb
+.RI "[ " OPTIONS " ] "
+.B ets
+.RI "{ " COMMAND " | " help " }"
+.sp
+
+.ti -8
+.B dcb ets show dev
+.RI DEV
+.RB "[ { " willing " | " ets-cap " | " cbs " | " tc-tsa " | " reco-tc-tsa
+.RB " | " pg-bw " | " tc-bw " | " reco-tc-bw " | " prio-tc
+.RB " | " reco-prio-tc " } ]"
+
+.ti -8
+.B dcb ets set dev
+.RI DEV
+.RB "[ " willing " { " on " | " off " } ]"
+.RB "[ { " tc-tsa " | " reco-tc-tsa " } " \fITSA-MAP\fB " ]"
+.RB "[ { " pg-bw " | " tc-bw " | " reco-tc-bw " } " \fIBW-MAP\fB " ]"
+.RB "[ { " prio-tc " | " reco-prio-tc " } " \fIPRIO-MAP\fB " ]"
+
+.ti -8
+.IR TSA-MAP " := [ " TSA-MAP " ] " TSA-MAPPING
+
+.ti -8
+.IR TSA-MAPPING " := { " TC " | " \fBall " }" \fB: "{ " \fBstrict\fR " | "
+.IR \fBcbs\fR " | " \fBets\fR " | " \fBvendor\fR " }"
+
+.ti -8
+.IR BW-MAP " := [ " BW-MAP " ] " BW-MAPPING
+
+.ti -8
+.IR BW-MAPPING " := { " TC " | " \fBall " }" \fB:\fIINTEGER\fR
+
+.ti -8
+.IR PRIO-MAP " := [ " PRIO-MAP " ] " PRIO-MAPPING
+
+.ti -8
+.IR PRIO-MAPPING " := { " PRIO " | " \fBall " }" \fB:\fITC\fR
+
+.ti -8
+.IR TC " := { " \fB0\fR " .. " \fB7\fR " }"
+
+.ti -8
+.IR PRIO " := { " \fB0\fR " .. " \fB7\fR " }"
+
+
+.SH DESCRIPTION
+
+.B dcb ets
+is used to configure Enhanced Transmission Selection attributes through Linux
+DCB (Data Center Bridging) interface. ETS permits configuration of mapping of
+priorities to traffic classes, traffic selection algorithm to use per traffic
+class, bandwidth allocation, etc.
+
+Two DCB TLVs are related to the ETS feature: a configuration and recommendation
+values. Recommendation values are named with a prefix
+.B reco-,
+while the configuration ones have plain names.
+
+.SH PARAMETERS
+
+For read-write parameters, the following describes only the write direction,
+i.e. as used with the \fBset\fR command. For the \fBshow\fR command, the
+parameter name is to be used as a simple keyword without further arguments. This
+instructs the tool to show the value of a given parameter. When no parameters
+are given, the tool shows the complete ETS configuration.
+
+.TP
+.B ets-cap
+A read-only property that shows the number of supported ETS traffic classes.
+
+.TP
+.B cbs
+A read-only property that is enabled if the driver and the hardware support the
+CBS Transmission Selection Algorithm.
+
+.TP
+.B willing \fR{ \fBon\fR | \fBoff\fR }
+Whether local host should accept configuration from peer TLVs.
+
+.TP
+.B prio-tc \fIPRIO-MAP
+.TQ
+.B reco-prio-tc \fIPRIO-MAP
+\fIPRIO-MAP\fR uses the array parameter syntax, see
+.BR dcb (8)
+for details. Keys are priorities, values are traffic classes. For each priority
+sets a TC where traffic with that priority is directed to.
+
+.TP
+.B tc-tsa \fITSA-MAP
+.TQ
+.B reco-tc-tsa \fITSA-MAP
+\fITSA-MAP\fR uses the array parameter syntax, see
+.BR dcb (8)
+for details. Keys are TCs, values are Transmission Selection Algorithm (TSA)
+keywords described below. For each TC sets an algorithm used for deciding how
+traffic queued up at this TC is scheduled for transmission. Supported TSAs are:
+
+.B strict
+- for strict priority, where traffic in higher-numbered TCs always takes
+precedence over traffic in lower-numbered TCs.
+.br
+.B ets
+- for Enhanced Traffic Selection, where available bandwidth is distributed among
+the ETS-enabled TCs according to the weights set by
+.B tc-bw
+and
+.B reco-tc-bw\fR,
+respectively.
+.br
+.B cbs
+- for Credit Based Shaper, where traffic is scheduled in a strict manner up to
+the limit set by a shaper.
+.br
+.B vendor
+- for vendor-specific traffic selection algorithm.
+
+.TP
+.B tc-bw \fIBW-MAP
+.TQ
+.B reco-tc-bw \fIBW-MAP
+\fIBW-MAP\fR uses the array parameter syntax, see
+.BR dcb (8)
+for details. Keys are TCs, values are integers representing percent of available
+bandwidth given to the traffic class in question. The value should be 0 for TCs
+whose TSA is not \fBets\fR, and the sum of all values shall be 100. As an
+exception to the standard wording, a configuration with no \fBets\fR TCs is
+permitted to sum up to 0 instead.
+.br
+
+.TP
+.B pg-bw \fIBW-MAP
+The precise meaning of \fBpg-bw\fR is not standardized, but the assumption seems
+to be that the same scheduling process as on the transmit side is applicable on
+receive side as well, and configures receive bandwidth allocation for \fBets\fR
+ingress traffic classes (priority groups).
+
+.SH EXAMPLE & USAGE
+
+Configure ETS priomap in a one-to-one fashion:
+
+.P
+# dcb ets set dev eth0 prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7
+
+Set TSA and transmit bandwidth configuration:
+
+.P
+# dcb ets set dev eth0 tc-tsa all:strict 0:ets 1:ets 2:ets \\
+.br
+ tc-bw all:0 0:33 1:33 2:34
+
+Show what was set:
+
+.P
+# dcb ets show dev eth0 prio-tc tc-tsa tc-bw
+.br
+prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7
+.br
+tc-tsa 0:ets 1:ets 2:ets 3:strict 4:strict 5:strict 6:strict 7:strict
+.br
+tc-bw 0:33 1:33 2:34 3:0 4:0 5:0 6:0 7:0
+
+.SH EXIT STATUS
+Exit status is 0 if command was successful or a positive integer upon failure.
+
+.SH SEE ALSO
+.BR dcb (8)
+
+.SH REPORTING BUGS
+Report any bugs to the Network Developers mailing list
+.B <netdev@vger.kernel.org>
+where the development and maintenance is primarily done.
+You do not have to be subscribed to the list to send a message there.
+
+.SH AUTHOR
+Petr Machata <me@pmachata.org>
projects / mirror_iproute2.git / commitdiff