libnl 3.5.0

tc.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * src/lib/tc.c CLI Traffic Control Helpers
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation version 2.1
8 * of the License.
9 *
10 * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
11 */
12
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/tc.h>
15 #include <netlink-private/route/tc-api.h>
16
17 /**
18 * @ingroup cli
19 * @defgroup cli_tc Traffic Control
20 * @{
21 */
22 void nl_cli_tc_parse_dev(struct rtnl_tc *tc, struct nl_cache *link_cache, char *name)
23 {
24 struct rtnl_link *link;
25
26 link = rtnl_link_get_by_name(link_cache, name);
27 if (!link)
28 nl_cli_fatal(ENOENT, "Link \"%s\" does not exist.", name);
29
30 rtnl_tc_set_link(tc, link);
31 rtnl_link_put(link);
32 }
33
34 void nl_cli_tc_parse_parent(struct rtnl_tc *tc, char *arg)
35 {
36 uint32_t parent;
37 int err;
38
39 if ((err = rtnl_tc_str2handle(arg, &parent)) < 0)
40 nl_cli_fatal(err, "Unable to parse handle \"%s\": %s",
41 arg, nl_geterror(err));
42
43 rtnl_tc_set_parent(tc, parent);
44 }
45
46 void nl_cli_tc_parse_handle(struct rtnl_tc *tc, char *arg, int create)
47 {
48 uint32_t handle, parent;
49 int err;
50
51 parent = rtnl_tc_get_parent(tc);
52
53 if ((err = rtnl_tc_str2handle(arg, &handle)) < 0) {
54 if (err == -NLE_OBJ_NOTFOUND && create)
55 err = rtnl_classid_generate(arg, &handle, parent);
56
57 if (err < 0)
58 nl_cli_fatal(err, "Unable to parse handle \"%s\": %s",
59 arg, nl_geterror(err));
60 }
61
62 rtnl_tc_set_handle(tc, handle);
63 }
64
65 void nl_cli_tc_parse_mtu(struct rtnl_tc *tc, char *arg)
66 {
67 rtnl_tc_set_mtu(tc, nl_cli_parse_u32(arg));
68 }
69
70 void nl_cli_tc_parse_mpu(struct rtnl_tc *tc, char *arg)
71 {
72 rtnl_tc_set_mpu(tc, nl_cli_parse_u32(arg));
73 }
74
75 void nl_cli_tc_parse_overhead(struct rtnl_tc *tc, char *arg)
76 {
77 rtnl_tc_set_overhead(tc, nl_cli_parse_u32(arg));
78 }
79
80 void nl_cli_tc_parse_kind(struct rtnl_tc *tc, char *arg)
81 {
82 rtnl_tc_set_kind(tc, arg);
83 }
84
85 void nl_cli_tc_parse_linktype(struct rtnl_tc *tc, char *arg)
86 {
87 int type;
88
89 if ((type = nl_str2llproto(arg)) < 0)
90 nl_cli_fatal(type, "Unable to parse linktype \"%s\": %s",
91 arg, nl_geterror(type));
92
93 rtnl_tc_set_linktype(tc, type);
94 }
95
96 static NL_LIST_HEAD(tc_modules);
97
98 static struct nl_cli_tc_module *__nl_cli_tc_lookup(struct rtnl_tc_ops *ops)
99 {
100 struct nl_cli_tc_module *tm;
101
102 nl_list_for_each_entry(tm, &tc_modules, tm_list)
103 if (tm->tm_ops == ops)
104 return tm;
105
106 return NULL;
107 }
108
109 struct nl_cli_tc_module *nl_cli_tc_lookup(struct rtnl_tc_ops *ops)
110 {
111 struct nl_cli_tc_module *tm;
112
113 if ((tm = __nl_cli_tc_lookup(ops)))
114 return tm;
115
116 switch (ops->to_type) {
117 case RTNL_TC_TYPE_QDISC:
118 case RTNL_TC_TYPE_CLASS:
119 nl_cli_load_module("cli/qdisc", ops->to_kind);
120 break;
121
122 case RTNL_TC_TYPE_CLS:
123 nl_cli_load_module("cli/cls", ops->to_kind);
124 break;
125
126 default:
127 nl_cli_fatal(EINVAL, "BUG: unhandled TC object type %d",
128 ops->to_type);
129 }
130
131 if (!(tm = __nl_cli_tc_lookup(ops))) {
132 nl_cli_fatal(EINVAL, "Application bug: The shared library for "
133 "the tc object \"%s\" was successfully loaded but it "
134 "seems that module did not register itself",
135 ops->to_kind);
136 }
137
138 return tm;
139 }
140
141 void nl_cli_tc_register(struct nl_cli_tc_module *tm)
142 {
143 struct rtnl_tc_ops *ops;
144
145 if (!(ops = rtnl_tc_lookup_ops(tm->tm_type, tm->tm_name))) {
146 nl_cli_fatal(ENOENT, "Unable to register CLI TC module "
147 "\"%s\": No matching libnl TC module found.", tm->tm_name);
148 }
149
150 if (__nl_cli_tc_lookup(ops)) {
151 nl_cli_fatal(EEXIST, "Unable to register CLI TC module "
152 "\"%s\": Module already registered.", tm->tm_name);
153 }
154
155 tm->tm_ops = ops;
156
157 nl_list_add_tail(&tm->tm_list, &tc_modules);
158 }
159
160 void nl_cli_tc_unregister(struct nl_cli_tc_module *tm)
161 {
162 nl_list_del(&tm->tm_list);
163 }
164
165
166 /** @} */
rtnl_link_get_by_name
struct rtnl_link * rtnl_link_get_by_name(struct nl_cache *cache, const char *name)
Lookup link in cache by link name.
Definition: link.c:1337
rtnl_tc_set_kind
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:530
rtnl_tc_str2handle
int rtnl_tc_str2handle(const char *str, uint32_t *res)
Convert a charactering strint to a traffic control handle.
Definition: classid.c:155
rtnl_tc_set_linktype
void rtnl_tc_set_linktype(struct rtnl_tc *tc, uint32_t type)
Set the linktype of a traffic control object.
Definition: tc.c:457
rtnl_tc_set_parent
void rtnl_tc_set_parent(struct rtnl_tc *tc, uint32_t parent)
Set the parent identifier of a traffic control object.
Definition: tc.c:508
rtnl_link
Link object.
rtnl_tc_set_link
void rtnl_tc_set_link(struct rtnl_tc *tc, struct rtnl_link *link)
Set link of traffic control object.
Definition: tc.c:311
nl_cli_tc_module
Definition: tc.h:28
rtnl_tc_get_parent
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:518
nl_cli_parse_u32
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
Definition: utils.c:43
rtnl_tc_set_handle
void rtnl_tc_set_handle(struct rtnl_tc *tc, uint32_t id)
Set identifier of traffic control object.
Definition: tc.c:487
rtnl_tc_set_mpu
void rtnl_tc_set_mpu(struct rtnl_tc *tc, uint32_t mpu)
Set the Minimum Packet Unit (MPU) of a traffic control object.
Definition: tc.c:400
nl_cli_fatal
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78
rtnl_tc_set_mtu
void rtnl_tc_set_mtu(struct rtnl_tc *tc, uint32_t mtu)
Set the Maximum Transmission Unit (MTU) of traffic control object.
Definition: tc.c:365
rtnl_tc_set_overhead
void rtnl_tc_set_overhead(struct rtnl_tc *tc, uint32_t overhead)
Set per packet overhead of a traffic control object.
Definition: tc.c:429
rtnl_link_put
void rtnl_link_put(struct rtnl_link *link)
Return a link object reference.
Definition: link.c:1940