1 /* SPDX-License-Identifier: LGPL-2.1+
2 * Copyright © 2019 VMware, Inc. */
4 #include <linux/pkt_sched.h>
6 #include "alloc-util.h"
7 #include "conf-parser.h"
8 #include "in-addr-util.h"
9 #include "netlink-util.h"
10 #include "networkd-manager.h"
11 #include "parse-util.h"
14 #include "string-util.h"
18 const QDiscVTable
* const qdisc_vtable
[_QDISC_KIND_MAX
] = {
19 [QDISC_KIND_BFIFO
] = &bfifo_vtable
,
20 [QDISC_KIND_CAKE
] = &cake_vtable
,
21 [QDISC_KIND_CODEL
] = &codel_vtable
,
22 [QDISC_KIND_DRR
] = &drr_vtable
,
23 [QDISC_KIND_ETS
] = &ets_vtable
,
24 [QDISC_KIND_FQ
] = &fq_vtable
,
25 [QDISC_KIND_FQ_CODEL
] = &fq_codel_vtable
,
26 [QDISC_KIND_GRED
] = &gred_vtable
,
27 [QDISC_KIND_HHF
] = &hhf_vtable
,
28 [QDISC_KIND_HTB
] = &htb_vtable
,
29 [QDISC_KIND_NETEM
] = &netem_vtable
,
30 [QDISC_KIND_PIE
] = &pie_vtable
,
31 [QDISC_KIND_QFQ
] = &qfq_vtable
,
32 [QDISC_KIND_PFIFO
] = &pfifo_vtable
,
33 [QDISC_KIND_PFIFO_FAST
] = &pfifo_fast_vtable
,
34 [QDISC_KIND_PFIFO_HEAD_DROP
] = &pfifo_head_drop_vtable
,
35 [QDISC_KIND_SFB
] = &sfb_vtable
,
36 [QDISC_KIND_SFQ
] = &sfq_vtable
,
37 [QDISC_KIND_TBF
] = &tbf_vtable
,
38 [QDISC_KIND_TEQL
] = &teql_vtable
,
41 static int qdisc_new(QDiscKind kind
, QDisc
**ret
) {
45 if (kind
== _QDISC_KIND_INVALID
) {
46 qdisc
= new(QDisc
, 1);
51 .meta
.kind
= TC_KIND_QDISC
,
57 qdisc
= malloc0(qdisc_vtable
[kind
]->object_size
);
61 qdisc
->meta
.kind
= TC_KIND_QDISC
,
62 qdisc
->family
= AF_UNSPEC
;
63 qdisc
->parent
= TC_H_ROOT
;
66 if (QDISC_VTABLE(qdisc
)->init
) {
67 r
= QDISC_VTABLE(qdisc
)->init(qdisc
);
73 *ret
= TAKE_PTR(qdisc
);
78 int qdisc_new_static(QDiscKind kind
, Network
*network
, const char *filename
, unsigned section_line
, QDisc
**ret
) {
79 _cleanup_(network_config_section_freep
) NetworkConfigSection
*n
= NULL
;
80 _cleanup_(qdisc_freep
) QDisc
*qdisc
= NULL
;
81 TrafficControl
*existing
;
88 assert(section_line
> 0);
90 r
= network_config_section_new(filename
, section_line
, &n
);
94 existing
= ordered_hashmap_get(network
->tc_by_section
, n
);
96 if (existing
->kind
!= TC_KIND_QDISC
)
99 q
= TC_TO_QDISC(existing
);
101 if (q
->kind
!= _QDISC_KIND_INVALID
&&
102 kind
!= _QDISC_KIND_INVALID
&&
106 if (q
->kind
== kind
|| kind
== _QDISC_KIND_INVALID
) {
112 r
= qdisc_new(kind
, &qdisc
);
117 qdisc
->family
= q
->family
;
118 qdisc
->handle
= q
->handle
;
119 qdisc
->parent
= q
->parent
;
120 qdisc
->tca_kind
= TAKE_PTR(q
->tca_kind
);
125 qdisc
->network
= network
;
126 qdisc
->section
= TAKE_PTR(n
);
128 r
= ordered_hashmap_ensure_allocated(&network
->tc_by_section
, &network_config_hash_ops
);
132 r
= ordered_hashmap_put(network
->tc_by_section
, qdisc
->section
, TC(qdisc
));
136 *ret
= TAKE_PTR(qdisc
);
140 void qdisc_free(QDisc
*qdisc
) {
144 if (qdisc
->network
&& qdisc
->section
)
145 ordered_hashmap_remove(qdisc
->network
->tc_by_section
, qdisc
->section
);
147 network_config_section_free(qdisc
->section
);
149 free(qdisc
->tca_kind
);
153 static int qdisc_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
157 assert(link
->tc_messages
> 0);
160 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
163 r
= sd_netlink_message_get_errno(m
);
164 if (r
< 0 && r
!= -EEXIST
) {
165 log_link_message_error_errno(link
, m
, r
, "Could not set QDisc");
166 link_enter_failed(link
);
170 if (link
->tc_messages
== 0) {
171 log_link_debug(link
, "Traffic control configured");
172 link
->tc_configured
= true;
173 link_check_ready(link
);
179 int qdisc_configure(Link
*link
, QDisc
*qdisc
) {
180 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
184 assert(link
->manager
);
185 assert(link
->manager
->rtnl
);
186 assert(link
->ifindex
> 0);
188 r
= sd_rtnl_message_new_qdisc(link
->manager
->rtnl
, &req
, RTM_NEWQDISC
, qdisc
->family
, link
->ifindex
);
190 return log_link_error_errno(link
, r
, "Could not create RTM_NEWQDISC message: %m");
192 r
= sd_rtnl_message_set_qdisc_parent(req
, qdisc
->parent
);
194 return log_link_error_errno(link
, r
, "Could not create tcm_parent message: %m");
196 if (qdisc
->handle
!= TC_H_UNSPEC
) {
197 r
= sd_rtnl_message_set_qdisc_handle(req
, qdisc
->handle
);
199 return log_link_error_errno(link
, r
, "Could not set tcm_handle message: %m");
202 if (QDISC_VTABLE(qdisc
)) {
203 if (QDISC_VTABLE(qdisc
)->fill_tca_kind
) {
204 r
= QDISC_VTABLE(qdisc
)->fill_tca_kind(link
, qdisc
, req
);
208 r
= sd_netlink_message_append_string(req
, TCA_KIND
, QDISC_VTABLE(qdisc
)->tca_kind
);
210 return log_link_error_errno(link
, r
, "Could not append TCA_KIND attribute: %m");
213 if (QDISC_VTABLE(qdisc
)->fill_message
) {
214 r
= QDISC_VTABLE(qdisc
)->fill_message(link
, qdisc
, req
);
219 r
= sd_netlink_message_append_string(req
, TCA_KIND
, qdisc
->tca_kind
);
221 return log_link_error_errno(link
, r
, "Could not append TCA_KIND attribute: %m");
224 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, qdisc_handler
, link_netlink_destroy_callback
, link
);
226 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
234 int qdisc_section_verify(QDisc
*qdisc
, bool *has_root
, bool *has_clsact
) {
241 if (section_is_invalid(qdisc
->section
))
244 if (QDISC_VTABLE(qdisc
) && QDISC_VTABLE(qdisc
)->verify
) {
245 r
= QDISC_VTABLE(qdisc
)->verify(qdisc
);
250 if (qdisc
->parent
== TC_H_ROOT
) {
252 return log_warning_errno(SYNTHETIC_ERRNO(EINVAL
),
253 "%s: More than one root qdisc section is defined. "
254 "Ignoring the qdisc section from line %u.",
255 qdisc
->section
->filename
, qdisc
->section
->line
);
257 } else if (qdisc
->parent
== TC_H_CLSACT
) { /* TC_H_CLSACT == TC_H_INGRESS */
259 return log_warning_errno(SYNTHETIC_ERRNO(EINVAL
),
260 "%s: More than one clsact or ingress qdisc section is defined. "
261 "Ignoring the qdisc section from line %u.",
262 qdisc
->section
->filename
, qdisc
->section
->line
);
269 int config_parse_qdisc_parent(
271 const char *filename
,
274 unsigned section_line
,
281 _cleanup_(qdisc_free_or_set_invalidp
) QDisc
*qdisc
= NULL
;
282 Network
*network
= data
;
290 r
= qdisc_new_static(ltype
, network
, filename
, section_line
, &qdisc
);
294 if (streq(rvalue
, "root")) {
295 qdisc
->parent
= TC_H_ROOT
;
296 if (qdisc
->handle
== 0)
297 qdisc
->handle
= TC_H_UNSPEC
;
298 } else if (streq(rvalue
, "clsact")) {
299 qdisc
->parent
= TC_H_CLSACT
;
300 qdisc
->handle
= TC_H_MAKE(TC_H_CLSACT
, 0);
301 } else if (streq(rvalue
, "ingress")) {
302 qdisc
->parent
= TC_H_INGRESS
;
303 qdisc
->handle
= TC_H_MAKE(TC_H_INGRESS
, 0);
305 r
= parse_handle(rvalue
, &qdisc
->parent
);
307 log_syntax(unit
, LOG_ERR
, filename
, line
, r
,
308 "Failed to parse 'Parent=', ignoring assignment: %s",
314 if (STR_IN_SET(rvalue
, "clsact", "ingress")) {
315 r
= free_and_strdup(&qdisc
->tca_kind
, rvalue
);
319 qdisc
->tca_kind
= mfree(qdisc
->tca_kind
);
326 int config_parse_qdisc_handle(
328 const char *filename
,
331 unsigned section_line
,
338 _cleanup_(qdisc_free_or_set_invalidp
) QDisc
*qdisc
= NULL
;
339 Network
*network
= data
;
348 r
= qdisc_new_static(ltype
, network
, filename
, section_line
, &qdisc
);
352 if (isempty(rvalue
)) {
353 qdisc
->handle
= TC_H_UNSPEC
;
358 r
= safe_atou16_full(rvalue
, 16, &n
);
360 log_syntax(unit
, LOG_ERR
, filename
, line
, r
,
361 "Failed to parse 'Handle=', ignoring assignment: %s",
366 qdisc
->handle
= (uint32_t) n
<< 16;