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-rw-r--r--src/network/tc/htb.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/src/network/tc/htb.c b/src/network/tc/htb.c
new file mode 100644
index 0000000..eb2c8cf
--- /dev/null
+++ b/src/network/tc/htb.c
@@ -0,0 +1,487 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "networkd-link.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "htb.h"
+#include "string-util.h"
+#include "tc-util.h"
+
+#define HTB_DEFAULT_RATE_TO_QUANTUM 10
+#define HTB_DEFAULT_MTU 1600 /* Ethernet packet length */
+
+static int hierarchy_token_bucket_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+ HierarchyTokenBucket *htb;
+ int r;
+
+ assert(link);
+ assert(qdisc);
+ assert(req);
+
+ assert_se(htb = HTB(qdisc));
+
+ struct tc_htb_glob opt = {
+ .version = 3,
+ .rate2quantum = htb->rate_to_quantum,
+ .defcls = htb->default_class,
+ };
+
+ r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "htb");
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_data(req, TCA_HTB_INIT, &opt, sizeof(opt));
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+ return 0;
+}
+
+int config_parse_hierarchy_token_bucket_default_class(
+ 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;
+ HierarchyTokenBucket *htb;
+ Network *network = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = qdisc_new_static(QDISC_KIND_HTB, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+ return 0;
+ }
+
+ htb = HTB(qdisc);
+
+ if (isempty(rvalue)) {
+ htb->default_class = 0;
+
+ TAKE_PTR(qdisc);
+ return 0;
+ }
+
+ r = safe_atou32_full(rvalue, 16, &htb->default_class);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ TAKE_PTR(qdisc);
+
+ return 0;
+}
+
+int config_parse_hierarchy_token_bucket_u32(
+ 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;
+ HierarchyTokenBucket *htb;
+ Network *network = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = qdisc_new_static(QDISC_KIND_HTB, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+ return 0;
+ }
+
+ htb = HTB(qdisc);
+
+ if (isempty(rvalue)) {
+ htb->rate_to_quantum = HTB_DEFAULT_RATE_TO_QUANTUM;
+
+ TAKE_PTR(qdisc);
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &htb->rate_to_quantum);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ TAKE_PTR(qdisc);
+
+ return 0;
+}
+
+static int hierarchy_token_bucket_init(QDisc *qdisc) {
+ HierarchyTokenBucket *htb;
+
+ assert(qdisc);
+
+ htb = HTB(qdisc);
+
+ htb->rate_to_quantum = HTB_DEFAULT_RATE_TO_QUANTUM;
+
+ return 0;
+}
+
+const QDiscVTable htb_vtable = {
+ .object_size = sizeof(HierarchyTokenBucket),
+ .tca_kind = "htb",
+ .fill_message = hierarchy_token_bucket_fill_message,
+ .init = hierarchy_token_bucket_init,
+};
+
+static int hierarchy_token_bucket_class_fill_message(Link *link, TClass *tclass, sd_netlink_message *req) {
+ HierarchyTokenBucketClass *htb;
+ uint32_t rtab[256], ctab[256];
+ int r;
+
+ assert(link);
+ assert(tclass);
+ assert(req);
+
+ assert_se(htb = TCLASS_TO_HTB(tclass));
+
+ struct tc_htb_opt opt = {
+ .prio = htb->priority,
+ .quantum = htb->quantum,
+ .rate.rate = (htb->rate >= (1ULL << 32)) ? ~0U : htb->rate,
+ .ceil.rate = (htb->ceil_rate >= (1ULL << 32)) ? ~0U : htb->ceil_rate,
+ .rate.overhead = htb->overhead,
+ .ceil.overhead = htb->overhead,
+ };
+
+ r = tc_transmit_time(htb->rate, htb->buffer, &opt.buffer);
+ if (r < 0)
+ return log_link_debug_errno(link, r, "Failed to calculate buffer size: %m");
+
+ r = tc_transmit_time(htb->ceil_rate, htb->ceil_buffer, &opt.cbuffer);
+ if (r < 0)
+ return log_link_debug_errno(link, r, "Failed to calculate ceil buffer size: %m");
+
+ r = tc_fill_ratespec_and_table(&opt.rate, rtab, htb->mtu);
+ if (r < 0)
+ return log_link_debug_errno(link, r, "Failed to calculate rate table: %m");
+
+ r = tc_fill_ratespec_and_table(&opt.ceil, ctab, htb->mtu);
+ if (r < 0)
+ return log_link_debug_errno(link, r, "Failed to calculate ceil rate table: %m");
+
+ r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "htb");
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_data(req, TCA_HTB_PARMS, &opt, sizeof(opt));
+ if (r < 0)
+ return r;
+
+ if (htb->rate >= (1ULL << 32)) {
+ r = sd_netlink_message_append_u64(req, TCA_HTB_RATE64, htb->rate);
+ if (r < 0)
+ return r;
+ }
+
+ if (htb->ceil_rate >= (1ULL << 32)) {
+ r = sd_netlink_message_append_u64(req, TCA_HTB_CEIL64, htb->ceil_rate);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_netlink_message_append_data(req, TCA_HTB_RTAB, rtab, sizeof(rtab));
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_data(req, TCA_HTB_CTAB, ctab, sizeof(ctab));
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_u32(
+ 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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+ HierarchyTokenBucketClass *htb;
+ Network *network = ASSERT_PTR(data);
+ uint32_t v;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to create traffic control class, ignoring assignment: %m");
+ return 0;
+ }
+
+ htb = TCLASS_TO_HTB(tclass);
+
+ if (isempty(rvalue)) {
+ htb->priority = 0;
+ tclass = NULL;
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &v);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ htb->priority = v;
+ tclass = NULL;
+
+ return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_size(
+ 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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+ HierarchyTokenBucketClass *htb;
+ Network *network = ASSERT_PTR(data);
+ uint64_t v;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to create traffic control class, ignoring assignment: %m");
+ return 0;
+ }
+
+ htb = TCLASS_TO_HTB(tclass);
+
+ if (isempty(rvalue)) {
+ if (streq(lvalue, "QuantumBytes"))
+ htb->quantum = 0;
+ else if (streq(lvalue, "MTUBytes"))
+ htb->mtu = HTB_DEFAULT_MTU;
+ else if (streq(lvalue, "OverheadBytes"))
+ htb->overhead = 0;
+ else if (streq(lvalue, "BufferBytes"))
+ htb->buffer = 0;
+ else if (streq(lvalue, "CeilBufferBytes"))
+ htb->ceil_buffer = 0;
+ else
+ assert_not_reached();
+
+ tclass = NULL;
+ return 0;
+ }
+
+ r = parse_size(rvalue, 1024, &v);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+ if ((streq(lvalue, "OverheadBytes") && v > UINT16_MAX) || v > UINT32_MAX) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "Invalid '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ if (streq(lvalue, "QuantumBytes"))
+ htb->quantum = v;
+ else if (streq(lvalue, "OverheadBytes"))
+ htb->overhead = v;
+ else if (streq(lvalue, "MTUBytes"))
+ htb->mtu = v;
+ else if (streq(lvalue, "BufferBytes"))
+ htb->buffer = v;
+ else if (streq(lvalue, "CeilBufferBytes"))
+ htb->ceil_buffer = v;
+ else
+ assert_not_reached();
+
+ tclass = NULL;
+
+ return 0;
+}
+
+int config_parse_hierarchy_token_bucket_class_rate(
+ 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_(tclass_free_or_set_invalidp) TClass *tclass = NULL;
+ HierarchyTokenBucketClass *htb;
+ Network *network = ASSERT_PTR(data);
+ uint64_t *v;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = tclass_new_static(TCLASS_KIND_HTB, network, filename, section_line, &tclass);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to create traffic control class, ignoring assignment: %m");
+ return 0;
+ }
+
+ htb = TCLASS_TO_HTB(tclass);
+ if (streq(lvalue, "Rate"))
+ v = &htb->rate;
+ else if (streq(lvalue, "CeilRate"))
+ v = &htb->ceil_rate;
+ else
+ assert_not_reached();
+
+ if (isempty(rvalue)) {
+ *v = 0;
+
+ tclass = NULL;
+ return 0;
+ }
+
+ r = parse_size(rvalue, 1000, v);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ *v /= 8;
+ tclass = NULL;
+
+ return 0;
+}
+
+static int hierarchy_token_bucket_class_init(TClass *tclass) {
+ HierarchyTokenBucketClass *htb;
+
+ assert(tclass);
+
+ htb = TCLASS_TO_HTB(tclass);
+
+ htb->mtu = HTB_DEFAULT_MTU;
+
+ return 0;
+}
+
+static int hierarchy_token_bucket_class_verify(TClass *tclass) {
+ HierarchyTokenBucketClass *htb;
+ uint32_t hz;
+ int r;
+
+ assert(tclass);
+
+ htb = TCLASS_TO_HTB(tclass);
+
+ if (htb->rate == 0)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: Rate= is mandatory. "
+ "Ignoring [HierarchyTokenBucketClass] section from line %u.",
+ tclass->section->filename, tclass->section->line);
+
+ /* if CeilRate= setting is missing, use the same as Rate= */
+ if (htb->ceil_rate == 0)
+ htb->ceil_rate = htb->rate;
+
+ r = tc_init(NULL, &hz);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read /proc/net/psched: %m");
+
+ if (htb->buffer == 0)
+ htb->buffer = htb->rate / hz + htb->mtu;
+ if (htb->ceil_buffer == 0)
+ htb->ceil_buffer = htb->ceil_rate / hz + htb->mtu;
+
+ return 0;
+}
+
+const TClassVTable htb_tclass_vtable = {
+ .object_size = sizeof(HierarchyTokenBucketClass),
+ .tca_kind = "htb",
+ .fill_message = hierarchy_token_bucket_class_fill_message,
+ .init = hierarchy_token_bucket_class_init,
+ .verify = hierarchy_token_bucket_class_verify,
+};
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