nl-cls-delete.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2008-2010 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/cls.h>
#include <netlink/cli/link.h>
 
#include <linux/netlink.h>
 
static int quiet = 0, default_yes = 0, deleted = 0, interactive = 0;
static struct nl_sock *sock;
 
static void print_usage(void)
{
        printf(
"Usage: nl-cls-delete [OPTION]... [class]\n"
"\n"
"OPTIONS\n"
"     --interactive         Run interactively.\n"
"     --yes                 Set default answer to yes.\n"
" -q, --quiet               Do not print informal notifications.\n"
" -h, --help                Show this help text and exit.\n"
" -v, --version             Show versioning information and exit.\n"
"\n"
" -d, --dev=DEV             Device the classifer is attached to.\n"
" -p, --parent=ID           Identifier of parent qdisc/class.\n"
" -i, --id=ID               Identifier\n"
" -k, --kind=NAME           Kind of classifier (e.g. basic, u32, fw)\n"
"     --proto=PROTO         Protocol to match (default: all)\n"
"     --prio=PRIO           Priority (default: 0)\n"
"\n"
"EXAMPLE\n"
"    # Delete all classifiers on eth0 attached to parent q_root:\n"
"    $ nl-cls-delete --dev eth0 --parent q_root:\n"
"\n"
        );
 
        exit(0);
}
 
static void delete_cb(struct nl_object *obj, void *arg)
{
        struct rtnl_cls *cls = nl_object_priv(obj);
        struct nl_dump_params params = {
                .dp_type = NL_DUMP_LINE,
                .dp_fd = stdout,
        };
        int err;
 
        if (interactive && !nl_cli_confirm(obj, &params, default_yes))
                return;
 
        if ((err = rtnl_cls_delete(sock, cls, 0)) < 0)
                nl_cli_fatal(err, "Unable to delete classifier: %s\n",
                                nl_geterror(err));
 
        if (!quiet) {
                printf("Deleted ");
                nl_object_dump(obj, &params);
        }
 
        deleted++;
}
 
static void __delete_link(int ifindex, struct rtnl_cls *filter)
{
        struct nl_cache *cache;
        uint32_t parent = rtnl_tc_get_parent((struct rtnl_tc *) filter);
 
        cache = nl_cli_cls_alloc_cache(sock, ifindex, parent);
        nl_cache_foreach_filter(cache, OBJ_CAST(filter), delete_cb, NULL);
        nl_cache_free(cache);
}
 
static void delete_link(struct nl_object *obj, void *arg)
{
        struct rtnl_link *link = nl_object_priv(obj);
 
        __delete_link(rtnl_link_get_ifindex(link), arg);
}
 
int main(int argc, char *argv[])
{
        struct rtnl_cls *cls;
        struct rtnl_tc *tc;
        struct nl_cache *link_cache;
        int ifindex;
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
        link_cache = nl_cli_link_alloc_cache(sock);
        cls = nl_cli_cls_alloc();
        tc = (struct rtnl_tc *) cls;
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_YES = 257,
                        ARG_INTERACTIVE = 258,
                        ARG_PROTO,
                        ARG_PRIO,
                };
                static struct option long_opts[] = {
                        { "interactive", 0, 0, ARG_INTERACTIVE },
                        { "yes", 0, 0, ARG_YES },
                        { "quiet", 0, 0, 'q' },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "dev", 1, 0, 'd' },
                        { "parent", 1, 0, 'p' },
                        { "id", 1, 0, 'i' },
                        { "kind", 1, 0, 'k' },
                        { "proto", 1, 0, ARG_PROTO },
                        { "prio", 1, 0, ARG_PRIO },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "qhvd:p:i:k:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case '?': nl_cli_fatal(EINVAL, "Invalid options");
                case ARG_INTERACTIVE: interactive = 1; break;
                case ARG_YES: default_yes = 1; break;
                case 'q': quiet = 1; break;
                case 'h': print_usage(); break;
                case 'v': nl_cli_print_version(); break;
                case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
                case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
                case 'i': nl_cli_tc_parse_handle(tc, optarg, 0); break;
                case 'k': nl_cli_tc_parse_kind(tc, optarg); break;
                case ARG_PROTO: nl_cli_cls_parse_proto(cls, optarg); break;
                case ARG_PRIO:
                        rtnl_cls_set_prio(cls, nl_cli_parse_u32(optarg));
                        break;
                }
        }
 
        if ((ifindex = rtnl_tc_get_ifindex(tc)))
                __delete_link(ifindex, cls);
        else
                nl_cache_foreach(link_cache, delete_link, cls);
 
        if (!quiet)
                printf("Deleted %d classs\n", deleted);
 
        return 0;
}