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      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 (at) 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 = {
     45 		.dp_type = NL_DUMP_LINE,
     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 }
    145