| /* 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 "qdisc.h" |
| #include "set.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "tc-util.h" |
| |
| const QDiscVTable * const qdisc_vtable[_QDISC_KIND_MAX] = { |
| [QDISC_KIND_BFIFO] = &bfifo_vtable, |
| [QDISC_KIND_CAKE] = &cake_vtable, |
| [QDISC_KIND_CODEL] = &codel_vtable, |
| [QDISC_KIND_DRR] = &drr_vtable, |
| [QDISC_KIND_ETS] = &ets_vtable, |
| [QDISC_KIND_FQ] = &fq_vtable, |
| [QDISC_KIND_FQ_CODEL] = &fq_codel_vtable, |
| [QDISC_KIND_FQ_PIE] = &fq_pie_vtable, |
| [QDISC_KIND_GRED] = &gred_vtable, |
| [QDISC_KIND_HHF] = &hhf_vtable, |
| [QDISC_KIND_HTB] = &htb_vtable, |
| [QDISC_KIND_NETEM] = &netem_vtable, |
| [QDISC_KIND_PIE] = &pie_vtable, |
| [QDISC_KIND_QFQ] = &qfq_vtable, |
| [QDISC_KIND_PFIFO] = &pfifo_vtable, |
| [QDISC_KIND_PFIFO_FAST] = &pfifo_fast_vtable, |
| [QDISC_KIND_PFIFO_HEAD_DROP] = &pfifo_head_drop_vtable, |
| [QDISC_KIND_SFB] = &sfb_vtable, |
| [QDISC_KIND_SFQ] = &sfq_vtable, |
| [QDISC_KIND_TBF] = &tbf_vtable, |
| [QDISC_KIND_TEQL] = &teql_vtable, |
| }; |
| |
| static int qdisc_new(QDiscKind kind, QDisc **ret) { |
| _cleanup_(qdisc_freep) QDisc *qdisc = NULL; |
| int r; |
| |
| if (kind == _QDISC_KIND_INVALID) { |
| qdisc = new(QDisc, 1); |
| if (!qdisc) |
| return -ENOMEM; |
| |
| *qdisc = (QDisc) { |
| .meta.kind = TC_KIND_QDISC, |
| .family = AF_UNSPEC, |
| .parent = TC_H_ROOT, |
| .kind = kind, |
| }; |
| } else { |
| qdisc = malloc0(qdisc_vtable[kind]->object_size); |
| if (!qdisc) |
| return -ENOMEM; |
| |
| qdisc->meta.kind = TC_KIND_QDISC, |
| qdisc->family = AF_UNSPEC; |
| qdisc->parent = TC_H_ROOT; |
| qdisc->kind = kind; |
| |
| if (QDISC_VTABLE(qdisc)->init) { |
| r = QDISC_VTABLE(qdisc)->init(qdisc); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| *ret = TAKE_PTR(qdisc); |
| |
| return 0; |
| } |
| |
| int qdisc_new_static(QDiscKind kind, Network *network, const char *filename, unsigned section_line, QDisc **ret) { |
| _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; |
| _cleanup_(qdisc_freep) QDisc *qdisc = NULL; |
| TrafficControl *existing; |
| QDisc *q = NULL; |
| 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) { |
| if (existing->kind != TC_KIND_QDISC) |
| return -EINVAL; |
| |
| q = TC_TO_QDISC(existing); |
| |
| if (q->kind != _QDISC_KIND_INVALID && |
| kind != _QDISC_KIND_INVALID && |
| q->kind != kind) |
| return -EINVAL; |
| |
| if (q->kind == kind || kind == _QDISC_KIND_INVALID) { |
| *ret = q; |
| return 0; |
| } |
| } |
| |
| r = qdisc_new(kind, &qdisc); |
| if (r < 0) |
| return r; |
| |
| if (q) { |
| qdisc->family = q->family; |
| qdisc->handle = q->handle; |
| qdisc->parent = q->parent; |
| qdisc->tca_kind = TAKE_PTR(q->tca_kind); |
| |
| qdisc_free(q); |
| } |
| |
| qdisc->network = network; |
| qdisc->section = TAKE_PTR(n); |
| |
| r = ordered_hashmap_ensure_put(&network->tc_by_section, &network_config_hash_ops, qdisc->section, TC(qdisc)); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(qdisc); |
| return 0; |
| } |
| |
| QDisc* qdisc_free(QDisc *qdisc) { |
| if (!qdisc) |
| return NULL; |
| |
| if (qdisc->network && qdisc->section) |
| ordered_hashmap_remove(qdisc->network->tc_by_section, qdisc->section); |
| |
| network_config_section_free(qdisc->section); |
| |
| free(qdisc->tca_kind); |
| return mfree(qdisc); |
| } |
| |
| static int qdisc_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 QDisc"); |
| 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 qdisc_configure(Link *link, QDisc *qdisc) { |
| _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_qdisc(link->manager->rtnl, &req, RTM_NEWQDISC, qdisc->family, link->ifindex); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not create RTM_NEWQDISC message: %m"); |
| |
| r = sd_rtnl_message_set_qdisc_parent(req, qdisc->parent); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not create tcm_parent message: %m"); |
| |
| if (qdisc->handle != TC_H_UNSPEC) { |
| r = sd_rtnl_message_set_qdisc_handle(req, qdisc->handle); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set tcm_handle message: %m"); |
| } |
| |
| if (QDISC_VTABLE(qdisc)) { |
| if (QDISC_VTABLE(qdisc)->fill_tca_kind) { |
| r = QDISC_VTABLE(qdisc)->fill_tca_kind(link, qdisc, req); |
| if (r < 0) |
| return r; |
| } else { |
| r = sd_netlink_message_append_string(req, TCA_KIND, QDISC_VTABLE(qdisc)->tca_kind); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not append TCA_KIND attribute: %m"); |
| } |
| |
| if (QDISC_VTABLE(qdisc)->fill_message) { |
| r = QDISC_VTABLE(qdisc)->fill_message(link, qdisc, req); |
| if (r < 0) |
| return r; |
| } |
| } else { |
| r = sd_netlink_message_append_string(req, TCA_KIND, qdisc->tca_kind); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not append TCA_KIND attribute: %m"); |
| } |
| |
| r = netlink_call_async(link->manager->rtnl, NULL, req, qdisc_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 qdisc_section_verify(QDisc *qdisc, bool *has_root, bool *has_clsact) { |
| int r; |
| |
| assert(qdisc); |
| assert(has_root); |
| assert(has_clsact); |
| |
| if (section_is_invalid(qdisc->section)) |
| return -EINVAL; |
| |
| if (QDISC_VTABLE(qdisc) && QDISC_VTABLE(qdisc)->verify) { |
| r = QDISC_VTABLE(qdisc)->verify(qdisc); |
| if (r < 0) |
| return r; |
| } |
| |
| if (qdisc->parent == TC_H_ROOT) { |
| if (*has_root) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: More than one root qdisc section is defined. " |
| "Ignoring the qdisc section from line %u.", |
| qdisc->section->filename, qdisc->section->line); |
| *has_root = true; |
| } else if (qdisc->parent == TC_H_CLSACT) { /* TC_H_CLSACT == TC_H_INGRESS */ |
| if (*has_clsact) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: More than one clsact or ingress qdisc section is defined. " |
| "Ignoring the qdisc section from line %u.", |
| qdisc->section->filename, qdisc->section->line); |
| *has_clsact = true; |
| } |
| |
| return 0; |
| } |
| |
| int config_parse_qdisc_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_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL; |
| Network *network = data; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = qdisc_new_static(ltype, 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; |
| } |
| |
| if (streq(rvalue, "root")) { |
| qdisc->parent = TC_H_ROOT; |
| if (qdisc->handle == 0) |
| qdisc->handle = TC_H_UNSPEC; |
| } else if (streq(rvalue, "clsact")) { |
| qdisc->parent = TC_H_CLSACT; |
| qdisc->handle = TC_H_MAKE(TC_H_CLSACT, 0); |
| } else if (streq(rvalue, "ingress")) { |
| qdisc->parent = TC_H_INGRESS; |
| qdisc->handle = TC_H_MAKE(TC_H_INGRESS, 0); |
| } else { |
| r = parse_handle(rvalue, &qdisc->parent); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to parse 'Parent=', ignoring assignment: %s", |
| rvalue); |
| return 0; |
| } |
| } |
| |
| if (STR_IN_SET(rvalue, "clsact", "ingress")) { |
| r = free_and_strdup(&qdisc->tca_kind, rvalue); |
| if (r < 0) |
| return log_oom(); |
| } else |
| qdisc->tca_kind = mfree(qdisc->tca_kind); |
| |
| TAKE_PTR(qdisc); |
| |
| return 0; |
| } |
| |
| int config_parse_qdisc_handle( |
| 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; |
| Network *network = data; |
| uint16_t n; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = qdisc_new_static(ltype, 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; |
| } |
| |
| if (isempty(rvalue)) { |
| qdisc->handle = TC_H_UNSPEC; |
| TAKE_PTR(qdisc); |
| return 0; |
| } |
| |
| r = safe_atou16_full(rvalue, 16, &n); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to parse 'Handle=', ignoring assignment: %s", |
| rvalue); |
| return 0; |
| } |
| |
| qdisc->handle = (uint32_t) n << 16; |
| TAKE_PTR(qdisc); |
| |
| return 0; |
| } |
