libnl  3.2.24-rc1
nl-qdisc-delete.c
1 /*
2  * src/nl-qdisc-delete.c Delete Queuing Disciplines
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation version 2.1
7  * of the License.
8  *
9  * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 #include <netlink/cli/utils.h>
13 #include <netlink/cli/tc.h>
14 #include <netlink/cli/qdisc.h>
15 #include <netlink/cli/link.h>
16 
17 static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
18 static struct nl_sock *sock;
19 
20 static void print_usage(void)
21 {
22  printf(
23  "Usage: nl-qdisc-delete [OPTION]... [QDISC]\n"
24  "\n"
25  "OPTIONS\n"
26  " --interactive Run interactively.\n"
27  " --yes Set default answer to yes.\n"
28  " -q, --quiet Do not print informal notifications.\n"
29  " -h, --help Show this help text and exit.\n"
30  " -v, --version Show versioning information and exit.\n"
31  "\n"
32  " -d, --dev=DEV Device the qdisc is attached to.\n"
33  " -p, --parent=ID Identifier of parent qdisc/class.\n"
34  " -i, --id=ID Identifier\n"
35  " -k, --kind=NAME Kind of qdisc (e.g. pfifo_fast)\n"
36  );
37 
38  exit(0);
39 }
40 
41 static void delete_cb(struct nl_object *obj, void *arg)
42 {
43  struct rtnl_qdisc *qdisc = nl_object_priv(obj);
44  struct nl_dump_params params = {
46  .dp_fd = stdout,
47  };
48  int err;
49 
50  /* Ignore default qdiscs, unable to delete */
51  if (rtnl_tc_get_handle((struct rtnl_tc *) qdisc) == 0)
52  return;
53 
54  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
55  return;
56 
57  if ((err = rtnl_qdisc_delete(sock, qdisc)) < 0)
58  nl_cli_fatal(err, "Unable to delete qdisc: %s\n", nl_geterror(err));
59 
60  if (!quiet) {
61  printf("Deleted ");
62  nl_object_dump(obj, &params);
63  }
64 
65  deleted++;
66 }
67 
68 int main(int argc, char *argv[])
69 {
70  struct rtnl_qdisc *qdisc;
71  struct rtnl_tc *tc;
72  struct nl_cache *link_cache, *qdisc_cache;
73  int nfilter = 0;
74 
75  sock = nl_cli_alloc_socket();
76  nl_cli_connect(sock, NETLINK_ROUTE);
77  link_cache = nl_cli_link_alloc_cache(sock);
78  qdisc_cache = nl_cli_qdisc_alloc_cache(sock);
79  qdisc = nl_cli_qdisc_alloc();
80  tc = (struct rtnl_tc *) qdisc;
81 
82  for (;;) {
83  int c, optidx = 0;
84  enum {
85  ARG_YES = 257,
86  ARG_INTERACTIVE = 258,
87  };
88  static struct option long_opts[] = {
89  { "interactive", 0, 0, ARG_INTERACTIVE },
90  { "yes", 0, 0, ARG_YES },
91  { "quiet", 0, 0, 'q' },
92  { "help", 0, 0, 'h' },
93  { "version", 0, 0, 'v' },
94  { "dev", 1, 0, 'd' },
95  { "parent", 1, 0, 'p' },
96  { "id", 1, 0, 'i' },
97  { "kind", 1, 0, 'k' },
98  { 0, 0, 0, 0 }
99  };
100 
101  c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
102  if (c == -1)
103  break;
104 
105  switch (c) {
106  case '?': nl_cli_fatal(EINVAL, "Invalid options");
107  case ARG_INTERACTIVE: interactive = 1; break;
108  case ARG_YES: default_yes = 1; break;
109  case 'q': quiet = 1; break;
110  case 'h': print_usage(); break;
111  case 'v': nl_cli_print_version(); break;
112  case 'd':
113  nfilter++;
114  nl_cli_tc_parse_dev(tc, link_cache, optarg);
115  break;
116  case 'p':
117  nfilter++;
118  nl_cli_tc_parse_parent(tc, optarg);
119  break;
120  case 'i':
121  nfilter++;
122  nl_cli_tc_parse_handle(tc, optarg, 0);
123  break;
124  case 'k':
125  nfilter++;
126  nl_cli_tc_parse_kind(tc, optarg);
127  break;
128  }
129  }
130 
131  if (nfilter == 0 && !interactive && !default_yes) {
132  nl_cli_fatal(EINVAL,
133  "You are attempting to delete all qdiscs on all devices.\n"
134  "If you want to proceed, run nl-qdisc-delete --yes.\n"
135  "Aborting...");
136  }
137 
138  nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(qdisc), delete_cb, NULL);
139 
140  if (!quiet)
141  printf("Deleted %d qdiscs\n", deleted);
142 
143  return 0;
144 }