libnl  3.5.0
nl-qdisc-delete.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-qdisc-delete.c Delete Queuing Disciplines
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) 2003-2010 Thomas Graf <tgraf@suug.ch>
11  */
12 
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/tc.h>
15 #include <netlink/cli/qdisc.h>
16 #include <netlink/cli/link.h>
17 
18 #include <linux/netlink.h>
19 
20 static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
21 static struct nl_sock *sock;
22 
23 static void print_usage(void)
24 {
25  printf(
26  "Usage: nl-qdisc-delete [OPTION]... [QDISC]\n"
27  "\n"
28  "OPTIONS\n"
29  " --interactive Run interactively.\n"
30  " --yes Set default answer to yes.\n"
31  " -q, --quiet Do not print informal notifications.\n"
32  " -h, --help Show this help text and exit.\n"
33  " -v, --version Show versioning information and exit.\n"
34  "\n"
35  " -d, --dev=DEV Device the qdisc is attached to.\n"
36  " -p, --parent=ID Identifier of parent qdisc/class.\n"
37  " -i, --id=ID Identifier\n"
38  " -k, --kind=NAME Kind of qdisc (e.g. pfifo_fast)\n"
39  );
40 
41  exit(0);
42 }
43 
44 static void delete_cb(struct nl_object *obj, void *arg)
45 {
46  struct rtnl_qdisc *qdisc = nl_object_priv(obj);
47  struct nl_dump_params params = {
49  .dp_fd = stdout,
50  };
51  int err;
52 
53  /* Ignore default qdiscs, unable to delete */
54  if (rtnl_tc_get_handle((struct rtnl_tc *) qdisc) == 0)
55  return;
56 
57  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
58  return;
59 
60  if ((err = rtnl_qdisc_delete(sock, qdisc)) < 0)
61  nl_cli_fatal(err, "Unable to delete qdisc: %s\n", nl_geterror(err));
62 
63  if (!quiet) {
64  printf("Deleted ");
65  nl_object_dump(obj, &params);
66  }
67 
68  deleted++;
69 }
70 
71 int main(int argc, char *argv[])
72 {
73  struct rtnl_qdisc *qdisc;
74  struct rtnl_tc *tc;
75  struct nl_cache *link_cache, *qdisc_cache;
76  int nfilter = 0;
77 
78  sock = nl_cli_alloc_socket();
79  nl_cli_connect(sock, NETLINK_ROUTE);
80  link_cache = nl_cli_link_alloc_cache(sock);
81  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
82  qdisc = nl_cli_qdisc_alloc();
83  tc = (struct rtnl_tc *) qdisc;
84 
85  for (;;) {
86  int c, optidx = 0;
87  enum {
88  ARG_YES = 257,
89  ARG_INTERACTIVE = 258,
90  };
91  static struct option long_opts[] = {
92  { "interactive", 0, 0, ARG_INTERACTIVE },
93  { "yes", 0, 0, ARG_YES },
94  { "quiet", 0, 0, 'q' },
95  { "help", 0, 0, 'h' },
96  { "version", 0, 0, 'v' },
97  { "dev", 1, 0, 'd' },
98  { "parent", 1, 0, 'p' },
99  { "id", 1, 0, 'i' },
100  { "kind", 1, 0, 'k' },
101  { 0, 0, 0, 0 }
102  };
103 
104  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
105  if (c == -1)
106  break;
107 
108  switch (c) {
109  case '?': nl_cli_fatal(EINVAL, "Invalid options");
110  case ARG_INTERACTIVE: interactive = 1; break;
111  case ARG_YES: default_yes = 1; break;
112  case 'q': quiet = 1; break;
113  case 'h': print_usage(); break;
114  case 'v': nl_cli_print_version(); break;
115  case 'd':
116  nfilter++;
117  nl_cli_tc_parse_dev(tc, link_cache, optarg);
118  break;
119  case 'p':
120  nfilter++;
121  nl_cli_tc_parse_parent(tc, optarg);
122  break;
123  case 'i':
124  nfilter++;
125  nl_cli_tc_parse_handle(tc, optarg, 0);
126  break;
127  case 'k':
128  nfilter++;
129  nl_cli_tc_parse_kind(tc, optarg);
130  break;
131  }
132  }
133 
134  if (nfilter == 0 && !interactive && !default_yes) {
135  nl_cli_fatal(EINVAL,
136  "You are attempting to delete all qdiscs on all devices.\n"
137  "If you want to proceed, run nl-qdisc-delete --yes.\n"
138  "Aborting...");
139  }
140 
141  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), delete_cb, NULL);
142 
143  if (!quiet)
144  printf("Deleted %d qdiscs\n", deleted);
145 
146  return 0;
147 }
Dump object briefly on one line.
Definition: types.h:22
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
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:1283
uint32_t rtnl_tc_get_handle(struct rtnl_tc *tc)
Return identifier of a traffic control object.
Definition: tc.c:497
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition: object.c:289
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78
Dumping parameters.
Definition: types.h:33
int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
Delete qdisc.
Definition: qdisc.c:341