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-rw-r--r--src/network/tc/tclass.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/src/network/tc/tclass.c b/src/network/tc/tclass.c
new file mode 100644
index 0000000..21b26b0
--- /dev/null
+++ b/src/network/tc/tclass.c
@@ -0,0 +1,289 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2019 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "in-addr-util.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "set.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tc-util.h"
+#include "tclass.h"
+
+const TClassVTable * const tclass_vtable[_TCLASS_KIND_MAX] = {
+ [TCLASS_KIND_DRR] = &drr_tclass_vtable,
+ [TCLASS_KIND_HTB] = &htb_tclass_vtable,
+ [TCLASS_KIND_QFQ] = &qfq_tclass_vtable,
+};
+
+static int tclass_new(TClassKind kind, TClass **ret) {
+ _cleanup_(tclass_freep) TClass *tclass = NULL;
+ int r;
+
+ tclass = malloc0(tclass_vtable[kind]->object_size);
+ if (!tclass)
+ return -ENOMEM;
+
+ tclass->meta.kind = TC_KIND_TCLASS,
+ tclass->parent = TC_H_ROOT;
+ tclass->kind = kind;
+
+ if (TCLASS_VTABLE(tclass)->init) {
+ r = TCLASS_VTABLE(tclass)->init(tclass);
+ if (r < 0)
+ return r;
+ }
+
+ *ret = TAKE_PTR(tclass);
+
+ return 0;
+}
+
+int tclass_new_static(TClassKind kind, Network *network, const char *filename, unsigned section_line, TClass **ret) {
+ _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
+ _cleanup_(tclass_freep) TClass *tclass = NULL;
+ TrafficControl *existing;
+ int r;
+
+ assert(network);
+ assert(ret);
+ assert(filename);
+ assert(section_line > 0);
+
+ r = network_config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ existing = ordered_hashmap_get(network->tc_by_section, n);
+ if (existing) {
+ TClass *t;
+
+ if (existing->kind != TC_KIND_TCLASS)
+ return -EINVAL;
+
+ t = TC_TO_TCLASS(existing);
+
+ if (t->kind != kind)
+ return -EINVAL;
+
+ *ret = t;
+ return 0;
+ }
+
+ r = tclass_new(kind, &tclass);
+ if (r < 0)
+ return r;
+
+ tclass->network = network;
+ tclass->section = TAKE_PTR(n);
+
+ r = ordered_hashmap_ensure_allocated(&network->tc_by_section, &network_config_hash_ops);
+ if (r < 0)
+ return r;
+
+ r = ordered_hashmap_put(network->tc_by_section, tclass->section, tclass);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(tclass);
+ return 0;
+}
+
+void tclass_free(TClass *tclass) {
+ if (!tclass)
+ return;
+
+ if (tclass->network && tclass->section)
+ ordered_hashmap_remove(tclass->network->tc_by_section, tclass->section);
+
+ network_config_section_free(tclass->section);
+
+ free(tclass);
+}
+
+static int tclass_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->tc_messages > 0);
+ link->tc_messages--;
+
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return 1;
+
+ r = sd_netlink_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_link_message_error_errno(link, m, r, "Could not set TClass");
+ link_enter_failed(link);
+ return 1;
+ }
+
+ if (link->tc_messages == 0) {
+ log_link_debug(link, "Traffic control configured");
+ link->tc_configured = true;
+ link_check_ready(link);
+ }
+
+ return 1;
+}
+
+int tclass_configure(Link *link, TClass *tclass) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+ assert(link->ifindex > 0);
+
+ r = sd_rtnl_message_new_tclass(link->manager->rtnl, &req, RTM_NEWTCLASS, AF_UNSPEC, link->ifindex);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not create RTM_NEWTCLASS message: %m");
+
+ r = sd_rtnl_message_set_tclass_parent(req, tclass->parent);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not create tcm_parent message: %m");
+
+ if (tclass->classid != TC_H_UNSPEC) {
+ r = sd_rtnl_message_set_tclass_handle(req, tclass->classid);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not set tcm_handle message: %m");
+ }
+
+ r = sd_netlink_message_append_string(req, TCA_KIND, TCLASS_VTABLE(tclass)->tca_kind);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append TCA_KIND attribute: %m");
+
+ if (TCLASS_VTABLE(tclass)->fill_message) {
+ r = TCLASS_VTABLE(tclass)->fill_message(link, tclass, req);
+ if (r < 0)
+ return r;
+ }
+
+ r = netlink_call_async(link->manager->rtnl, NULL, req, tclass_handler, link_netlink_destroy_callback, link);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+ link_ref(link);
+ link->tc_messages++;
+
+ return 0;
+}
+
+int tclass_section_verify(TClass *tclass) {
+ int r;
+
+ assert(tclass);
+
+ if (section_is_invalid(tclass->section))
+ return -EINVAL;
+
+ if (TCLASS_VTABLE(tclass)->verify) {
+ r = TCLASS_VTABLE(tclass)->verify(tclass);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int config_parse_tclass_parent(
+ 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;
+ Network *network = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = tclass_new_static(ltype, 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;
+ }
+
+ if (streq(rvalue, "root"))
+ tclass->parent = TC_H_ROOT;
+ else {
+ r = parse_handle(rvalue, &tclass->parent);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse 'Parent=', ignoring assignment: %s",
+ rvalue);
+ return 0;
+ }
+ }
+
+ tclass = NULL;
+
+ return 0;
+}
+
+int config_parse_tclass_classid(
+ 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;
+ Network *network = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = tclass_new_static(ltype, 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;
+ }
+
+ if (isempty(rvalue)) {
+ tclass->classid = TC_H_UNSPEC;
+ tclass = NULL;
+ return 0;
+ }
+
+ r = parse_handle(rvalue, &tclass->classid);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse 'ClassId=', ignoring assignment: %s",
+ rvalue);
+ return 0;
+ }
+
+ tclass = NULL;
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-06 04:55:39 +0000