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-rw-r--r--src/network/tc/tclass.c639
1 files changed, 639 insertions, 0 deletions
diff --git a/src/network/tc/tclass.c b/src/network/tc/tclass.c
new file mode 100644
index 0000000..0a5fec0
--- /dev/null
+++ b/src/network/tc/tclass.c
@@ -0,0 +1,639 @@
+/* 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-link.h"
+#include "networkd-manager.h"
+#include "networkd-network.h"
+#include "networkd-queue.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;
+
+ if (kind == _TCLASS_KIND_INVALID) {
+ tclass = new(TClass, 1);
+ if (!tclass)
+ return -ENOMEM;
+
+ *tclass = (TClass) {
+ .parent = TC_H_ROOT,
+ .kind = kind,
+ };
+ } else {
+ assert(kind >= 0 && kind < _TCLASS_KIND_MAX);
+ tclass = malloc0(tclass_vtable[kind]->object_size);
+ if (!tclass)
+ return -ENOMEM;
+
+ 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_(config_section_freep) ConfigSection *n = NULL;
+ _cleanup_(tclass_freep) TClass *tclass = NULL;
+ TClass *existing;
+ int r;
+
+ assert(network);
+ assert(ret);
+ assert(filename);
+ assert(section_line > 0);
+
+ r = config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ existing = hashmap_get(network->tclasses_by_section, n);
+ if (existing) {
+ if (existing->kind != kind)
+ return -EINVAL;
+
+ *ret = existing;
+ return 0;
+ }
+
+ r = tclass_new(kind, &tclass);
+ if (r < 0)
+ return r;
+
+ tclass->network = network;
+ tclass->section = TAKE_PTR(n);
+ tclass->source = NETWORK_CONFIG_SOURCE_STATIC;
+
+ r = hashmap_ensure_put(&network->tclasses_by_section, &config_section_hash_ops, tclass->section, tclass);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(tclass);
+ return 0;
+}
+
+TClass* tclass_free(TClass *tclass) {
+ if (!tclass)
+ return NULL;
+
+ if (tclass->network && tclass->section)
+ hashmap_remove(tclass->network->tclasses_by_section, tclass->section);
+
+ config_section_free(tclass->section);
+
+ if (tclass->link)
+ set_remove(tclass->link->tclasses, tclass);
+
+ free(tclass->tca_kind);
+ return mfree(tclass);
+}
+
+static const char *tclass_get_tca_kind(const TClass *tclass) {
+ assert(tclass);
+
+ return (TCLASS_VTABLE(tclass) && TCLASS_VTABLE(tclass)->tca_kind) ?
+ TCLASS_VTABLE(tclass)->tca_kind : tclass->tca_kind;
+}
+
+static void tclass_hash_func(const TClass *tclass, struct siphash *state) {
+ assert(tclass);
+ assert(state);
+
+ siphash24_compress(&tclass->classid, sizeof(tclass->classid), state);
+ siphash24_compress(&tclass->parent, sizeof(tclass->parent), state);
+ siphash24_compress_string(tclass_get_tca_kind(tclass), state);
+}
+
+static int tclass_compare_func(const TClass *a, const TClass *b) {
+ int r;
+
+ assert(a);
+ assert(b);
+
+ r = CMP(a->classid, b->classid);
+ if (r != 0)
+ return r;
+
+ r = CMP(a->parent, b->parent);
+ if (r != 0)
+ return r;
+
+ return strcmp_ptr(tclass_get_tca_kind(a), tclass_get_tca_kind(b));
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+ tclass_hash_ops,
+ TClass,
+ tclass_hash_func,
+ tclass_compare_func,
+ tclass_free);
+
+static int tclass_get(Link *link, const TClass *in, TClass **ret) {
+ TClass *existing;
+
+ assert(link);
+ assert(in);
+
+ existing = set_get(link->tclasses, in);
+ if (!existing)
+ return -ENOENT;
+
+ if (ret)
+ *ret = existing;
+ return 0;
+}
+
+static int tclass_add(Link *link, TClass *tclass) {
+ int r;
+
+ assert(link);
+ assert(tclass);
+
+ r = set_ensure_put(&link->tclasses, &tclass_hash_ops, tclass);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -EEXIST;
+
+ tclass->link = link;
+ return 0;
+}
+
+static int tclass_dup(const TClass *src, TClass **ret) {
+ _cleanup_(tclass_freep) TClass *dst = NULL;
+
+ assert(src);
+ assert(ret);
+
+ if (TCLASS_VTABLE(src))
+ dst = memdup(src, TCLASS_VTABLE(src)->object_size);
+ else
+ dst = newdup(TClass, src, 1);
+ if (!dst)
+ return -ENOMEM;
+
+ /* clear all pointers */
+ dst->network = NULL;
+ dst->section = NULL;
+ dst->link = NULL;
+ dst->tca_kind = NULL;
+
+ if (src->tca_kind) {
+ dst->tca_kind = strdup(src->tca_kind);
+ if (!dst->tca_kind)
+ return -ENOMEM;
+ }
+
+ *ret = TAKE_PTR(dst);
+ return 0;
+}
+
+int link_find_tclass(Link *link, uint32_t classid, TClass **ret) {
+ TClass *tclass;
+
+ assert(link);
+
+ SET_FOREACH(tclass, link->tclasses) {
+ if (tclass->classid != classid)
+ continue;
+
+ if (!tclass_exists(tclass))
+ continue;
+
+ if (ret)
+ *ret = tclass;
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static void log_tclass_debug(TClass *tclass, Link *link, const char *str) {
+ _cleanup_free_ char *state = NULL;
+
+ assert(tclass);
+ assert(str);
+
+ if (!DEBUG_LOGGING)
+ return;
+
+ (void) network_config_state_to_string_alloc(tclass->state, &state);
+
+ log_link_debug(link, "%s %s TClass (%s): classid=%"PRIx32":%"PRIx32", parent=%"PRIx32":%"PRIx32", kind=%s",
+ str, strna(network_config_source_to_string(tclass->source)), strna(state),
+ TC_H_MAJ(tclass->classid) >> 16, TC_H_MIN(tclass->classid),
+ TC_H_MAJ(tclass->parent) >> 16, TC_H_MIN(tclass->parent),
+ strna(tclass_get_tca_kind(tclass)));
+}
+
+TClass* tclass_drop(TClass *tclass) {
+ QDisc *qdisc;
+ Link *link;
+
+ assert(tclass);
+
+ link = ASSERT_PTR(tclass->link);
+
+ /* Also drop all child qdiscs assigned to the class. */
+ SET_FOREACH(qdisc, link->qdiscs) {
+ if (qdisc->parent != tclass->classid)
+ continue;
+
+ qdisc_drop(qdisc);
+ }
+
+ tclass_enter_removed(tclass);
+
+ if (tclass->state == 0) {
+ log_tclass_debug(tclass, link, "Forgetting");
+ tclass = tclass_free(tclass);
+ } else
+ log_tclass_debug(tclass, link, "Removed");
+
+ return tclass;
+}
+
+static int tclass_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, TClass *tclass) {
+ int r;
+
+ assert(m);
+ assert(link);
+
+ 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;
+}
+
+static int tclass_configure(TClass *tclass, Link *link, Request *req) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+ int r;
+
+ assert(tclass);
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+ assert(link->ifindex > 0);
+ assert(req);
+
+ log_tclass_debug(tclass, link, "Configuring");
+
+ r = sd_rtnl_message_new_traffic_control(link->manager->rtnl, &m, RTM_NEWTCLASS,
+ link->ifindex, tclass->classid, tclass->parent);
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_string(m, TCA_KIND, TCLASS_VTABLE(tclass)->tca_kind);
+ if (r < 0)
+ return r;
+
+ if (TCLASS_VTABLE(tclass)->fill_message) {
+ r = TCLASS_VTABLE(tclass)->fill_message(link, tclass, m);
+ if (r < 0)
+ return r;
+ }
+
+ return request_call_netlink_async(link->manager->rtnl, m, req);
+}
+
+static bool tclass_is_ready_to_configure(TClass *tclass, Link *link) {
+ assert(tclass);
+ assert(link);
+
+ if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
+ return false;
+
+ return link_find_qdisc(link, TC_H_MAJ(tclass->classid), tclass_get_tca_kind(tclass), NULL) >= 0;
+}
+
+static int tclass_process_request(Request *req, Link *link, TClass *tclass) {
+ int r;
+
+ assert(req);
+ assert(link);
+ assert(tclass);
+
+ if (!tclass_is_ready_to_configure(tclass, link))
+ return 0;
+
+ r = tclass_configure(tclass, link, req);
+ if (r < 0)
+ return log_link_warning_errno(link, r, "Failed to configure TClass: %m");
+
+ tclass_enter_configuring(tclass);
+ return 1;
+}
+
+int link_request_tclass(Link *link, TClass *tclass) {
+ TClass *existing;
+ int r;
+
+ assert(link);
+ assert(tclass);
+
+ if (tclass_get(link, tclass, &existing) < 0) {
+ _cleanup_(tclass_freep) TClass *tmp = NULL;
+
+ r = tclass_dup(tclass, &tmp);
+ if (r < 0)
+ return log_oom();
+
+ r = tclass_add(link, tmp);
+ if (r < 0)
+ return log_link_warning_errno(link, r, "Failed to store TClass: %m");
+
+ existing = TAKE_PTR(tmp);
+ } else
+ existing->source = tclass->source;
+
+ log_tclass_debug(existing, link, "Requesting");
+ r = link_queue_request_safe(link, REQUEST_TYPE_TC_CLASS,
+ existing, NULL,
+ tclass_hash_func,
+ tclass_compare_func,
+ tclass_process_request,
+ &link->tc_messages,
+ tclass_handler,
+ NULL);
+ if (r < 0)
+ return log_link_warning_errno(link, r, "Failed to request TClass: %m");
+ if (r == 0)
+ return 0;
+
+ tclass_enter_requesting(existing);
+ return 1;
+}
+
+int manager_rtnl_process_tclass(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
+ _cleanup_(tclass_freep) TClass *tmp = NULL;
+ TClass *tclass = NULL;
+ Link *link;
+ uint16_t type;
+ int ifindex, r;
+
+ assert(rtnl);
+ assert(message);
+ assert(m);
+
+ if (sd_netlink_message_is_error(message)) {
+ r = sd_netlink_message_get_errno(message);
+ if (r < 0)
+ log_message_warning_errno(message, r, "rtnl: failed to receive TClass message, ignoring");
+
+ return 0;
+ }
+
+ r = sd_netlink_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
+ return 0;
+ } else if (!IN_SET(type, RTM_NEWTCLASS, RTM_DELTCLASS)) {
+ log_warning("rtnl: received unexpected message type %u when processing TClass, ignoring.", type);
+ return 0;
+ }
+
+ r = sd_rtnl_message_traffic_control_get_ifindex(message, &ifindex);
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get ifindex from message, ignoring: %m");
+ return 0;
+ } else if (ifindex <= 0) {
+ log_warning("rtnl: received TClass message with invalid ifindex %d, ignoring.", ifindex);
+ return 0;
+ }
+
+ if (link_get_by_index(m, ifindex, &link) < 0) {
+ if (!m->enumerating)
+ log_warning("rtnl: received TClass for link '%d' we don't know about, ignoring.", ifindex);
+ return 0;
+ }
+
+ r = tclass_new(_TCLASS_KIND_INVALID, &tmp);
+ if (r < 0)
+ return log_oom();
+
+ r = sd_rtnl_message_traffic_control_get_handle(message, &tmp->classid);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received TClass message without handle, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_rtnl_message_traffic_control_get_parent(message, &tmp->parent);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received TClass message without parent, ignoring: %m");
+ return 0;
+ }
+
+ r = sd_netlink_message_read_string_strdup(message, TCA_KIND, &tmp->tca_kind);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "rtnl: received TClass message without kind, ignoring: %m");
+ return 0;
+ }
+
+ (void) tclass_get(link, tmp, &tclass);
+
+ switch (type) {
+ case RTM_NEWTCLASS:
+ if (tclass) {
+ tclass_enter_configured(tclass);
+ log_tclass_debug(tclass, link, "Received remembered");
+ } else {
+ tclass_enter_configured(tmp);
+ log_tclass_debug(tmp, link, "Received new");
+
+ r = tclass_add(link, tmp);
+ if (r < 0) {
+ log_link_warning_errno(link, r, "Failed to remember TClass, ignoring: %m");
+ return 0;
+ }
+
+ tclass = TAKE_PTR(tmp);
+ }
+
+ break;
+
+ case RTM_DELTCLASS:
+ if (tclass)
+ (void) tclass_drop(tclass);
+ else
+ log_tclass_debug(tmp, link, "Kernel removed unknown");
+
+ break;
+
+ default:
+ assert_not_reached();
+ }
+
+ return 1;
+}
+
+int link_enumerate_tclass(Link *link, uint32_t parent) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
+ r = sd_rtnl_message_new_traffic_control(link->manager->rtnl, &req, RTM_GETTCLASS, link->ifindex, 0, parent);
+ if (r < 0)
+ return r;
+
+ return manager_enumerate_internal(link->manager, link->manager->rtnl, req, manager_rtnl_process_tclass);
+}
+
+static 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;
+}
+
+void network_drop_invalid_tclass(Network *network) {
+ TClass *tclass;
+
+ assert(network);
+
+ HASHMAP_FOREACH(tclass, network->tclasses_by_section)
+ if (tclass_section_verify(tclass) < 0)
+ tclass_free(tclass);
+}
+
+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 = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ 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;
+ }
+ }
+
+ TAKE_PTR(tclass);
+
+ 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 = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ 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;
+ TAKE_PTR(tclass);
+ 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;
+ }
+
+ TAKE_PTR(tclass);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 16:51:01 +0000