libnl: /data/src/libnl/src/nl-qdisc-delete.c Source File

libnl 3.12.0

nl-qdisc-delete.c
1/* SPDX-License-Identifier: LGPL-2.1-only */
2/*
3 * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
4 */
5
6#include "nl-default.h"
7
8#include <linux/netlink.h>
9
10#include <netlink/cli/utils.h>
11#include <netlink/cli/tc.h>
12#include <netlink/cli/qdisc.h>
13#include <netlink/cli/link.h>
14
15static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
16static struct nl_sock *sock;
17
18static void print_usage(void)
19{
20 printf(
21 "Usage: nl-qdisc-delete [OPTION]... [QDISC]\n"
22 "\n"
23 "OPTIONS\n"
24 " --interactive Run interactively.\n"
25 " --yes Set default answer to yes.\n"
26 " -q, --quiet Do not print informal notifications.\n"
27 " -h, --help Show this help text and exit.\n"
28 " -v, --version Show versioning information and exit.\n"
29 "\n"
30 " -d, --dev=DEV Device the qdisc is attached to.\n"
31 " -p, --parent=ID Identifier of parent qdisc/class.\n"
32 " -i, --id=ID Identifier\n"
33 " -k, --kind=NAME Kind of qdisc (e.g. pfifo_fast)\n"
34 );
35
36 exit(0);
37}
38
39static void delete_cb(struct nl_object *obj, void *arg)
40{
41 struct rtnl_qdisc *qdisc = nl_object_priv(obj);
42 struct nl_dump_params params = {
43 .dp_type = NL_DUMP_LINE,
44 .dp_fd = stdout,
45 };
46 int err;
47
48 /* Ignore default qdiscs, unable to delete */
49 if (rtnl_tc_get_handle((struct rtnl_tc *) qdisc) == 0)
50 return;
51
52 if (interactive && !nl_cli_confirm(obj, &params, default_yes))
53 return;
54
55 if ((err = rtnl_qdisc_delete(sock, qdisc)) < 0)
56 nl_cli_fatal(err, "Unable to delete qdisc: %s\n", nl_geterror(err));
57
58 if (!quiet) {
59 printf("Deleted ");
60 nl_object_dump(obj, &params);
61 }
62
63 deleted++;
64}
65
66int main(int argc, char *argv[])
67{
68 struct rtnl_qdisc *qdisc;
69 struct rtnl_tc *tc;
70 struct nl_cache *link_cache, *qdisc_cache;
71 int nfilter = 0;
72
73 sock = nl_cli_alloc_socket();
74 nl_cli_connect(sock, NETLINK_ROUTE);
75 link_cache = nl_cli_link_alloc_cache(sock);
76 qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
77 qdisc = nl_cli_qdisc_alloc();
78 tc = (struct rtnl_tc *) qdisc;
79
80 for (;;) {
81 int c, optidx = 0;
82 enum {
83 ARG_YES = 257,
84 ARG_INTERACTIVE = 258,
85 };
86 static struct option long_opts[] = {
87 { "interactive", 0, 0, ARG_INTERACTIVE },
88 { "yes", 0, 0, ARG_YES },
89 { "quiet", 0, 0, 'q' },
90 { "help", 0, 0, 'h' },
91 { "version", 0, 0, 'v' },
92 { "dev", 1, 0, 'd' },
93 { "parent", 1, 0, 'p' },
94 { "id", 1, 0, 'i' },
95 { "kind", 1, 0, 'k' },
96 { 0, 0, 0, 0 }
97 };
98
99 c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
100 if (c == -1)
101 break;
102
103 switch (c) {
104 case '?': nl_cli_fatal(EINVAL, "Invalid options");
105 case ARG_INTERACTIVE: interactive = 1; break;
106 case ARG_YES: default_yes = 1; break;
107 case 'q': quiet = 1; break;
108 case 'h': print_usage(); break;
109 case 'v': nl_cli_print_version(); break;
110 case 'd':
111 nfilter++;
112 nl_cli_tc_parse_dev(tc, link_cache, optarg);
113 break;
114 case 'p':
115 nfilter++;
116 nl_cli_tc_parse_parent(tc, optarg);
117 break;
118 case 'i':
119 nfilter++;
120 nl_cli_tc_parse_handle(tc, optarg, 0);
121 break;
122 case 'k':
123 nfilter++;
124 nl_cli_tc_parse_kind(tc, optarg);
125 break;
126 }
127 }
128
129 if (nfilter == 0 && !interactive && !default_yes) {
130 nl_cli_fatal(EINVAL,
131 "You are attempting to delete all qdiscs on all devices.\n"
132 "If you want to proceed, run nl-qdisc-delete --yes.\n"
133 "Aborting...");
134 }
135
136 nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), delete_cb, NULL);
137
138 if (!quiet)
139 printf("Deleted %d qdiscs\n", deleted);
140
141 return 0;
142}
nl_cache_foreach_filter
void nl_cache_foreach_filter(struct nl_cache *cache, struct nl_object *filter, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache (filtered).
Definition cache.c:1302
nl_cli_fatal
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition utils.c:71
nl_object_dump
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition object.c:294
rtnl_qdisc_delete
int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
Delete qdisc.
Definition qdisc.c:335
rtnl_tc_get_handle
uint32_t rtnl_tc_get_handle(struct rtnl_tc *tc)
Return identifier of a traffic control object.
Definition tc.c:495
NL_DUMP_LINE
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition types.h:20
nl_dump_params
Dumping parameters.
Definition types.h:32
rtnl_qdisc
Definition nl-route.h:119
rtnl_tc
Definition nl-route.h:115