</variablelist>
</refsect1>
+ <refsect1>
+ <title>[EnhancedTransmissionSelection] Section Options</title>
+ <para>The <literal>[EnhancedTransmissionSelection]</literal> section manages the queueing discipline (qdisc) of
+ Enhanced Transmission Selection (ETS).</para>
+
+ <variablelist class='network-directives'>
+ <xi:include href="tc.xml" xpointer="qdisc-parent" />
+ <xi:include href="tc.xml" xpointer="qdisc-handle" />
+
+ <varlistentry>
+ <term><varname>Bands=</varname></term>
+ <listitem>
+ <para>Specifies the number of bands. An unsigned integer ranges 1 to 16. This value has to be
+ at least large enough to cover the strict bands specified through the
+ <varname>StrictBands=</varname> and bandwidth-sharing bands specified in
+ <varname>QuantumBytes=</varname>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>StrictBands=</varname></term>
+ <listitem>
+ <para>Specifies the number of bands that should be created in strict mode. An unsigned integer
+ ranges 1 to 16.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>QuantumBytes=</varname></term>
+ <listitem>
+ <para>Specifies the white-space separated list of quantum used in band-sharing bands. When
+ suffixed with K, M, or G, the specified size is parsed as Kilobytes, Megabytes, or Gigabytes,
+ respectively, to the base of 1024. This setting can be specified multiple times. If an empty
+ string is assigned, then the all previous assignments are cleared.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PriorityMap=</varname></term>
+ <listitem>
+ <para>The priority map maps the priority of a packet to a band. The argument is a white-space
+ separated list of numbers. The first number indicates which band the packets with priority
+ 0 should be put to, the second is for priority 1, and so on. There can be up to 16 numbers in
+ the list. If there are fewer, the default band that traffic with one of the unmentioned
+ priorities goes to is the last one. Each band number must be 0..255. This setting can be
+ specified multiple times. If an empty string is assigned, then the all previous assignments
+ are cleared.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>[GenericRandomEarlyDetection] Section Options</title>
<para>The <literal>[GenericRandomEarlyDetection]</literal> section manages the queueing discipline
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "ets.h"
+#include "memory-util.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "string-util.h"
+#include "tc-util.h"
+
+static int enhanced_transmission_selection_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+ EnhancedTransmissionSelection *ets;
+ int r;
+
+ assert(link);
+ assert(qdisc);
+ assert(req);
+
+ ets = ETS(qdisc);
+
+ r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "ets");
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not open container TCA_OPTIONS: %m");
+
+ r = sd_netlink_message_append_u8(req, TCA_ETS_NBANDS, ets->n_bands);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_ETS_NBANDS attribute: %m");
+
+ if (ets->n_strict > 0) {
+ r = sd_netlink_message_append_u8(req, TCA_ETS_NSTRICT, ets->n_strict);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_ETS_NSTRICT attribute: %m");
+ }
+
+ if (ets->n_quanta > 0) {
+ r = sd_netlink_message_open_container(req, TCA_ETS_QUANTA);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not open container TCA_ETS_QUANTA: %m");
+
+ for (unsigned i = 0; i < ets->n_quanta; i++) {
+ r = sd_netlink_message_append_u32(req, TCA_ETS_QUANTA_BAND, ets->quanta[i]);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_ETS_QUANTA_BAND attribute: %m");
+ }
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not close container TCA_ETS_QUANTA: %m");
+ }
+
+ if (ets->n_prio > 0) {
+ r = sd_netlink_message_open_container(req, TCA_ETS_PRIOMAP);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not open container TCA_ETS_PRIOMAP: %m");
+
+ for (unsigned i = 0; i < ets->n_prio; i++) {
+ r = sd_netlink_message_append_u8(req, TCA_ETS_PRIOMAP_BAND, ets->prio[i]);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_ETS_PRIOMAP_BAND attribute: %m");
+ }
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not close container TCA_ETS_PRIOMAP: %m");
+ }
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not close container TCA_OPTIONS: %m");
+
+ return 0;
+}
+
+int config_parse_ets_u8(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
+ EnhancedTransmissionSelection *ets;
+ Network *network = data;
+ uint8_t v, *p;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_syntax(unit, LOG_ERR, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+
+ ets = ETS(qdisc);
+ if (streq(lvalue, "Bands"))
+ p = &ets->n_bands;
+ else if (streq(lvalue, "StrictBands"))
+ p = &ets->n_strict;
+ else
+ assert_not_reached("Invalid lvalue.");
+
+ if (isempty(rvalue)) {
+ *p = 0;
+
+ qdisc = NULL;
+ return 0;
+ }
+
+ r = safe_atou8(rvalue, &v);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+ if (v > TCQ_ETS_MAX_BANDS) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Invalid '%s='. The value must be <= %d, ignoring assignment: %s",
+ lvalue, TCQ_ETS_MAX_BANDS, rvalue);
+ return 0;
+ }
+
+ *p = v;
+ qdisc = NULL;
+
+ return 0;
+}
+
+int config_parse_ets_quanta(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
+ EnhancedTransmissionSelection *ets;
+ Network *network = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_syntax(unit, LOG_ERR, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+
+ ets = ETS(qdisc);
+
+ if (isempty(rvalue)) {
+ memzero(ets->quanta, sizeof(uint32_t) * TCQ_ETS_MAX_BANDS);
+ ets->n_quanta = 0;
+
+ qdisc = NULL;
+ return 0;
+ }
+
+ for (const char *p = rvalue;;) {
+ _cleanup_free_ char *word = NULL;
+ uint64_t v;
+
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to extract next value, ignoring: %m");
+ continue;
+ }
+ if (r == 0)
+ break;
+
+ r = parse_size(word, 1024, &v);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, word);
+ continue;
+ }
+ if (v == 0 || v > UINT32_MAX) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Invalid '%s=', ignoring assignment: %s",
+ lvalue, word);
+ continue;
+ }
+ if (ets->n_quanta >= TCQ_ETS_MAX_BANDS) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Too many quanta in '%s=', ignoring assignment: %s",
+ lvalue, word);
+ continue;
+ }
+
+ ets->quanta[ets->n_quanta++] = v;
+ }
+
+ qdisc = NULL;
+
+ return 0;
+}
+
+int config_parse_ets_prio(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
+ EnhancedTransmissionSelection *ets;
+ Network *network = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = qdisc_new_static(QDISC_KIND_ETS, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_syntax(unit, LOG_ERR, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+
+ ets = ETS(qdisc);
+
+ if (isempty(rvalue)) {
+ memzero(ets->prio, sizeof(uint8_t) * (TC_PRIO_MAX + 1));
+ ets->n_prio = 0;
+
+ qdisc = NULL;
+ return 0;
+ }
+
+ for (const char *p = rvalue;;) {
+ _cleanup_free_ char *word = NULL;
+ uint8_t v;
+
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to extract next value, ignoring: %m");
+ continue;
+ }
+ if (r == 0)
+ break;
+
+ r = safe_atou8(word, &v);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, word);
+ continue;
+ }
+ if (ets->n_quanta > TC_PRIO_MAX) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Too many priomap in '%s=', ignoring assignment: %s",
+ lvalue, word);
+ continue;
+ }
+
+ ets->prio[ets->n_prio++] = v;
+ }
+
+ qdisc = NULL;
+
+ return 0;
+}
+
+static int enhanced_transmission_selection_verify(QDisc *qdisc) {
+ EnhancedTransmissionSelection *ets;
+
+ assert(qdisc);
+
+ ets = ETS(qdisc);
+
+ if (ets->n_bands == 0)
+ ets->n_bands = ets->n_strict + ets->n_quanta;
+
+ if (ets->n_bands == 0)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: At least one of Band=, Strict=, or Quanta= must be specified. "
+ "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+ qdisc->section->filename, qdisc->section->line);
+
+ if (ets->n_bands < ets->n_strict + ets->n_quanta)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: Not enough total bands to cover all the strict bands and quanta. "
+ "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+ qdisc->section->filename, qdisc->section->line);
+
+ for (unsigned i = 0; i < ets->n_prio; i++)
+ if (ets->prio[i] >= ets->n_bands)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: PriorityMap= element is out of bands. "
+ "Ignoring [EnhancedTransmissionSelection] section from line %u.",
+ qdisc->section->filename, qdisc->section->line);
+
+ return 0;
+}
+
+const QDiscVTable ets_vtable = {
+ .object_size = sizeof(EnhancedTransmissionSelection),
+ .tca_kind = "ets",
+ .fill_message = enhanced_transmission_selection_fill_message,
+ .verify = enhanced_transmission_selection_verify,
+};
projects / thirdparty / systemd.git / commitdiff
