Blame bridge/link.c

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/* SPDX-License-Identifier: GPL-2.0 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <linux/if.h>
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#include <linux/if_bridge.h>
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#include <string.h>
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#include <stdbool.h>
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#include "json_print.h"
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#include "libnetlink.h"
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#include "utils.h"
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#include "br_common.h"
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static unsigned int filter_index;
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static const char *port_states[] = {
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	[BR_STATE_DISABLED] = "disabled",
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	[BR_STATE_LISTENING] = "listening",
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	[BR_STATE_LEARNING] = "learning",
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	[BR_STATE_FORWARDING] = "forwarding",
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	[BR_STATE_BLOCKING] = "blocking",
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};
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static const char *hw_mode[] = {
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	"VEB", "VEPA"
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};
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static void print_link_flags(FILE *fp, unsigned int flags, unsigned int mdown)
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{
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	open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<");
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	if (flags & IFF_UP && !(flags & IFF_RUNNING))
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		print_string(PRINT_ANY, NULL,
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			     flags ? "%s," : "%s", "NO-CARRIER");
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	flags &= ~IFF_RUNNING;
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#define _PF(f) if (flags&IFF_##f) {					\
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		flags &= ~IFF_##f ;					\
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		print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); }
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	_PF(LOOPBACK);
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	_PF(BROADCAST);
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	_PF(POINTOPOINT);
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	_PF(MULTICAST);
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	_PF(NOARP);
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	_PF(ALLMULTI);
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	_PF(PROMISC);
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	_PF(MASTER);
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	_PF(SLAVE);
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	_PF(DEBUG);
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	_PF(DYNAMIC);
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	_PF(AUTOMEDIA);
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	_PF(PORTSEL);
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	_PF(NOTRAILERS);
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	_PF(UP);
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	_PF(LOWER_UP);
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	_PF(DORMANT);
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	_PF(ECHO);
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#undef _PF
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	if (flags)
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		print_hex(PRINT_ANY, NULL, "%x", flags);
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	if (mdown)
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		print_string(PRINT_ANY, NULL, ",%s", "M-DOWN");
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	close_json_array(PRINT_ANY, "> ");
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}
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static void print_portstate(__u8 state)
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{
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	if (state <= BR_STATE_BLOCKING)
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		print_string(PRINT_ANY, "state",
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			     "state %s ", port_states[state]);
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	else
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		print_uint(PRINT_ANY, "state",
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			     "state (%d) ", state);
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}
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static void print_onoff(FILE *fp, const char *flag, __u8 val)
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{
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	if (is_json_context())
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		print_bool(PRINT_JSON, flag, NULL, val);
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	else
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		fprintf(fp, "%s %s ", flag, val ? "on" : "off");
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}
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static void print_hwmode(__u16 mode)
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{
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	if (mode >= ARRAY_SIZE(hw_mode))
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		print_0xhex(PRINT_ANY, "hwmode",
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			    "hwmode %#llx ", mode);
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	else
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		print_string(PRINT_ANY, "hwmode",
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			     "hwmode %s ", hw_mode[mode]);
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}
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static void print_protinfo(FILE *fp, struct rtattr *attr)
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{
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	if (attr->rta_type & NLA_F_NESTED) {
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		struct rtattr *prtb[IFLA_BRPORT_MAX + 1];
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		parse_rtattr_nested(prtb, IFLA_BRPORT_MAX, attr);
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		if (prtb[IFLA_BRPORT_STATE])
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			print_portstate(rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));
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		if (prtb[IFLA_BRPORT_PRIORITY])
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			print_uint(PRINT_ANY, "priority",
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				   "priority %u ",
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				   rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));
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		if (prtb[IFLA_BRPORT_COST])
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			print_uint(PRINT_ANY, "cost",
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				   "cost %u ",
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				   rta_getattr_u32(prtb[IFLA_BRPORT_COST]));
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		if (!show_details)
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			return;
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		if (!is_json_context())
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			fprintf(fp, "%s    ", _SL_);
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		if (prtb[IFLA_BRPORT_MODE])
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			print_onoff(fp, "hairpin",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_MODE]));
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		if (prtb[IFLA_BRPORT_GUARD])
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			print_onoff(fp, "guard",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_GUARD]));
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		if (prtb[IFLA_BRPORT_PROTECT])
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			print_onoff(fp, "root_block",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT]));
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		if (prtb[IFLA_BRPORT_FAST_LEAVE])
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			print_onoff(fp, "fastleave",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE]));
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		if (prtb[IFLA_BRPORT_LEARNING])
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			print_onoff(fp, "learning",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
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		if (prtb[IFLA_BRPORT_LEARNING_SYNC])
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			print_onoff(fp, "learning_sync",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
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		if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
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			print_onoff(fp, "flood",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
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		if (prtb[IFLA_BRPORT_MCAST_FLOOD])
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			print_onoff(fp, "mcast_flood",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD]));
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		if (prtb[IFLA_BRPORT_MCAST_TO_UCAST])
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			print_onoff(fp, "mcast_to_unicast",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_TO_UCAST]));
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		if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
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			print_onoff(fp, "neigh_suppress",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
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		if (prtb[IFLA_BRPORT_VLAN_TUNNEL])
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			print_onoff(fp, "vlan_tunnel",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL]));
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		if (prtb[IFLA_BRPORT_BACKUP_PORT]) {
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			int ifidx;
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			ifidx = rta_getattr_u32(prtb[IFLA_BRPORT_BACKUP_PORT]);
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			print_string(PRINT_ANY,
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				     "backup_port", "backup_port %s ",
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				     ll_index_to_name(ifidx));
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		}
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		if (prtb[IFLA_BRPORT_ISOLATED])
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			print_onoff(fp, "isolated",
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				    rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
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	} else
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		print_portstate(rta_getattr_u8(attr));
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}
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/*
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 * This is reported by HW devices that have some bridging
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 * capabilities.
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 */
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static void print_af_spec(struct rtattr *attr, int ifindex)
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{
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	struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
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	parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr);
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	if (aftb[IFLA_BRIDGE_MODE])
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		print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
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	if (!show_details)
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		return;
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	if (aftb[IFLA_BRIDGE_VLAN_INFO])
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		print_vlan_info(aftb[IFLA_BRIDGE_VLAN_INFO], ifindex);
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}
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int print_linkinfo(struct nlmsghdr *n, void *arg)
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{
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	FILE *fp = arg;
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	struct ifinfomsg *ifi = NLMSG_DATA(n);
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	struct rtattr *tb[IFLA_MAX+1];
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	unsigned int m_flag = 0;
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	int len = n->nlmsg_len;
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	const char *name;
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	len -= NLMSG_LENGTH(sizeof(*ifi));
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	if (len < 0) {
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		fprintf(stderr, "Message too short!\n");
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		return -1;
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	}
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	if (!(ifi->ifi_family == AF_BRIDGE || ifi->ifi_family == AF_UNSPEC))
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		return 0;
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	if (filter_index && filter_index != ifi->ifi_index)
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		return 0;
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	parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
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	name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]);
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	if (!name)
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		return -1;
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	open_json_object(NULL);
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	if (n->nlmsg_type == RTM_DELLINK)
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		print_bool(PRINT_ANY, "deleted", "Deleted ", true);
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	print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index);
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	m_flag = print_name_and_link("%s: ", name, tb);
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	print_link_flags(fp, ifi->ifi_flags, m_flag);
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	if (tb[IFLA_MTU])
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		print_int(PRINT_ANY,
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			  "mtu", "mtu %u ",
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			  rta_getattr_u32(tb[IFLA_MTU]));
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	if (tb[IFLA_MASTER]) {
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		int master = rta_getattr_u32(tb[IFLA_MASTER]);
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		print_string(PRINT_ANY, "master", "master %s ",
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			     ll_index_to_name(master));
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	}
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	if (tb[IFLA_PROTINFO])
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		print_protinfo(fp, tb[IFLA_PROTINFO]);
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	if (tb[IFLA_AF_SPEC])
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		print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index);
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	print_string(PRINT_FP, NULL, "%s", "\n");
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	close_json_object();
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	fflush(fp);
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	return 0;
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}
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static void usage(void)
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{
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	fprintf(stderr,
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		"Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n"
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		"                               [ guard {on | off} ]\n"
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		"                               [ hairpin {on | off} ]\n"
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		"                               [ fastleave {on | off} ]\n"
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		"                               [ root_block {on | off} ]\n"
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		"                               [ learning {on | off} ]\n"
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		"                               [ learning_sync {on | off} ]\n"
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		"                               [ flood {on | off} ]\n"
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		"                               [ mcast_flood {on | off} ]\n"
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		"                               [ mcast_to_unicast {on | off} ]\n"
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		"                               [ neigh_suppress {on | off} ]\n"
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		"                               [ vlan_tunnel {on | off} ]\n"
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		"                               [ isolated {on | off} ]\n"
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		"                               [ hwmode {vepa | veb} ]\n"
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		"                               [ backup_port DEVICE ] [ nobackup_port ]\n"
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		"                               [ self ] [ master ]\n"
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		"       bridge link show [dev DEV]\n");
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	exit(-1);
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}
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static bool on_off(char *arg, __s8 *attr, char *val)
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{
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	if (strcmp(val, "on") == 0)
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		*attr = 1;
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	else if (strcmp(val, "off") == 0)
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		*attr = 0;
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	else {
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		fprintf(stderr,
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			"Error: argument of \"%s\" must be \"on\" or \"off\"\n",
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			arg);
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		return false;
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	}
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	return true;
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}
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static int brlink_modify(int argc, char **argv)
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{
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	struct {
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		struct nlmsghdr  n;
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		struct ifinfomsg ifm;
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		char             buf[512];
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	} req = {
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		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
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		.n.nlmsg_flags = NLM_F_REQUEST,
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		.n.nlmsg_type = RTM_SETLINK,
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		.ifm.ifi_family = PF_BRIDGE,
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	};
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	char *d = NULL;
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	int backup_port_idx = -1;
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	__s8 neigh_suppress = -1;
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	__s8 learning = -1;
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	__s8 learning_sync = -1;
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	__s8 flood = -1;
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	__s8 vlan_tunnel = -1;
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	__s8 mcast_flood = -1;
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	__s8 mcast_to_unicast = -1;
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	__s8 isolated = -1;
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	__s8 hairpin = -1;
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	__s8 bpdu_guard = -1;
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	__s8 fast_leave = -1;
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	__s8 root_block = -1;
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	__u32 cost = 0;
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	__s16 priority = -1;
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	__s8 state = -1;
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	__s16 mode = -1;
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	__u16 flags = 0;
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	struct rtattr *nest;
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	while (argc > 0) {
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		if (strcmp(*argv, "dev") == 0) {
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			NEXT_ARG();
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			d = *argv;
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		} else if (strcmp(*argv, "guard") == 0) {
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			NEXT_ARG();
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			if (!on_off("guard", &bpdu_guard, *argv))
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				return -1;
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		} else if (strcmp(*argv, "hairpin") == 0) {
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			NEXT_ARG();
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			if (!on_off("hairpin", &hairpin, *argv))
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				return -1;
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		} else if (strcmp(*argv, "fastleave") == 0) {
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			NEXT_ARG();
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			if (!on_off("fastleave", &fast_leave, *argv))
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				return -1;
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		} else if (strcmp(*argv, "root_block") == 0) {
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			NEXT_ARG();
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			if (!on_off("root_block", &root_block, *argv))
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				return -1;
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		} else if (strcmp(*argv, "learning") == 0) {
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			NEXT_ARG();
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			if (!on_off("learning", &learning, *argv))
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				return -1;
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		} else if (strcmp(*argv, "learning_sync") == 0) {
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			NEXT_ARG();
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			if (!on_off("learning_sync", &learning_sync, *argv))
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				return -1;
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		} else if (strcmp(*argv, "flood") == 0) {
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			NEXT_ARG();
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			if (!on_off("flood", &flood, *argv))
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				return -1;
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		} else if (strcmp(*argv, "mcast_flood") == 0) {
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			NEXT_ARG();
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			if (!on_off("mcast_flood", &mcast_flood, *argv))
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				return -1;
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		} else if (strcmp(*argv, "mcast_to_unicast") == 0) {
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			NEXT_ARG();
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			if (!on_off("mcast_to_unicast", &mcast_to_unicast, *argv))
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				return -1;
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		} else if (strcmp(*argv, "cost") == 0) {
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			NEXT_ARG();
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			cost = atoi(*argv);
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		} else if (strcmp(*argv, "priority") == 0) {
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			NEXT_ARG();
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			priority = atoi(*argv);
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		} else if (strcmp(*argv, "state") == 0) {
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			NEXT_ARG();
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			char *endptr;
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			size_t nstates = ARRAY_SIZE(port_states);
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			state = strtol(*argv, &endptr, 10);
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			if (!(**argv != '\0' && *endptr == '\0')) {
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				for (state = 0; state < nstates; state++)
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					if (strcasecmp(port_states[state], *argv) == 0)
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						break;
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				if (state == nstates) {
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					fprintf(stderr,
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						"Error: invalid STP port state\n");
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					return -1;
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				}
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			}
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		} else if (strcmp(*argv, "hwmode") == 0) {
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			NEXT_ARG();
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			flags = BRIDGE_FLAGS_SELF;
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			if (strcmp(*argv, "vepa") == 0)
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				mode = BRIDGE_MODE_VEPA;
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			else if (strcmp(*argv, "veb") == 0)
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				mode = BRIDGE_MODE_VEB;
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			else {
Packit Service 3880ab
				fprintf(stderr,
Packit Service 3880ab
					"Mode argument must be \"vepa\" or \"veb\".\n");
Packit Service 3880ab
				return -1;
Packit Service 3880ab
			}
Packit Service 3880ab
		} else if (strcmp(*argv, "self") == 0) {
Packit Service 3880ab
			flags |= BRIDGE_FLAGS_SELF;
Packit Service 3880ab
		} else if (strcmp(*argv, "master") == 0) {
Packit Service 3880ab
			flags |= BRIDGE_FLAGS_MASTER;
Packit Service 3880ab
		} else if (strcmp(*argv, "neigh_suppress") == 0) {
Packit Service 3880ab
			NEXT_ARG();
Packit Service 3880ab
			if (!on_off("neigh_suppress", &neigh_suppress,
Packit Service 3880ab
				    *argv))
Packit Service 3880ab
				return -1;
Packit Service 3880ab
		} else if (strcmp(*argv, "vlan_tunnel") == 0) {
Packit Service 3880ab
			NEXT_ARG();
Packit Service 3880ab
			if (!on_off("vlan_tunnel", &vlan_tunnel,
Packit Service 3880ab
				    *argv))
Packit Service 3880ab
				return -1;
Packit Service 3880ab
		} else if (strcmp(*argv, "isolated") == 0) {
Packit Service 3880ab
			NEXT_ARG();
Packit Service 3880ab
			if (!on_off("isolated", &isolated, *argv))
Packit Service 3880ab
				return -1;
Packit Service 3880ab
		} else if (strcmp(*argv, "backup_port") == 0) {
Packit Service 3880ab
			NEXT_ARG();
Packit Service 3880ab
			backup_port_idx = ll_name_to_index(*argv);
Packit Service 3880ab
			if (!backup_port_idx) {
Packit Service 3880ab
				fprintf(stderr, "Error: device %s does not exist\n",
Packit Service 3880ab
					*argv);
Packit Service 3880ab
				return -1;
Packit Service 3880ab
			}
Packit Service 3880ab
		} else if (strcmp(*argv, "nobackup_port") == 0) {
Packit Service 3880ab
			backup_port_idx = 0;
Packit Service 3880ab
		} else {
Packit Service 3880ab
			usage();
Packit Service 3880ab
		}
Packit Service 3880ab
		argc--; argv++;
Packit Service 3880ab
	}
Packit Service 3880ab
	if (d == NULL) {
Packit Service 3880ab
		fprintf(stderr, "Device is a required argument.\n");
Packit Service 3880ab
		return -1;
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
Packit Service 3880ab
	req.ifm.ifi_index = ll_name_to_index(d);
Packit Service 3880ab
	if (req.ifm.ifi_index == 0) {
Packit Service 3880ab
		fprintf(stderr, "Cannot find bridge device \"%s\"\n", d);
Packit Service 3880ab
		return -1;
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	/* Nested PROTINFO attribute.  Contains: port flags, cost, priority and
Packit Service 3880ab
	 * state.
Packit Service 3880ab
	 */
Packit Service 3880ab
	nest = addattr_nest(&req.n, sizeof(req),
Packit Service 3880ab
			    IFLA_PROTINFO | NLA_F_NESTED);
Packit Service 3880ab
	/* Flags first */
Packit Service 3880ab
	if (bpdu_guard >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
Packit Service 3880ab
	if (hairpin >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
Packit Service 3880ab
	if (fast_leave >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
Packit Service 3880ab
			 fast_leave);
Packit Service 3880ab
	if (root_block >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
Packit Service 3880ab
	if (flood >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
Packit Service 3880ab
	if (mcast_flood >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD,
Packit Service 3880ab
			 mcast_flood);
Packit Service 3880ab
	if (mcast_to_unicast >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_TO_UCAST,
Packit Service 3880ab
			 mcast_to_unicast);
Packit Service 3880ab
	if (learning >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
Packit Service 3880ab
	if (learning_sync >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
Packit Service 3880ab
			 learning_sync);
Packit Service 3880ab
Packit Service 3880ab
	if (cost > 0)
Packit Service 3880ab
		addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
Packit Service 3880ab
Packit Service 3880ab
	if (priority >= 0)
Packit Service 3880ab
		addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);
Packit Service 3880ab
Packit Service 3880ab
	if (state >= 0)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
Packit Service 3880ab
Packit Service 3880ab
	if (neigh_suppress != -1)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
Packit Service 3880ab
			 neigh_suppress);
Packit Service 3880ab
	if (vlan_tunnel != -1)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL,
Packit Service 3880ab
			 vlan_tunnel);
Packit Service 3880ab
	if (isolated != -1)
Packit Service 3880ab
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);
Packit Service 3880ab
Packit Service 3880ab
	if (backup_port_idx != -1)
Packit Service 3880ab
		addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT,
Packit Service 3880ab
			  backup_port_idx);
Packit Service 3880ab
Packit Service 3880ab
	addattr_nest_end(&req.n, nest);
Packit Service 3880ab
Packit Service 3880ab
	/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
Packit Service 3880ab
	 * designates master or self operation and IFLA_BRIDGE_MODE
Packit Service 3880ab
	 * for hw 'vepa' or 'veb' operation modes. The hwmodes are
Packit Service 3880ab
	 * only valid in 'self' mode on some devices so far.
Packit Service 3880ab
	 */
Packit Service 3880ab
	if (mode >= 0 || flags > 0) {
Packit Service 3880ab
		nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
Packit Service 3880ab
Packit Service 3880ab
		if (flags > 0)
Packit Service 3880ab
			addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);
Packit Service 3880ab
Packit Service 3880ab
		if (mode >= 0)
Packit Service 3880ab
			addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);
Packit Service 3880ab
Packit Service 3880ab
		addattr_nest_end(&req.n, nest);
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	if (rtnl_talk(&rth, &req.n, NULL) < 0)
Packit Service 3880ab
		return -1;
Packit Service 3880ab
Packit Service 3880ab
	return 0;
Packit Service 3880ab
}
Packit Service 3880ab
Packit Service 3880ab
static int brlink_show(int argc, char **argv)
Packit Service 3880ab
{
Packit Service 3880ab
	char *filter_dev = NULL;
Packit Service 3880ab
Packit Service 3880ab
	while (argc > 0) {
Packit Service 3880ab
		if (strcmp(*argv, "dev") == 0) {
Packit Service 3880ab
			NEXT_ARG();
Packit Service 3880ab
			if (filter_dev)
Packit Service 3880ab
				duparg("dev", *argv);
Packit Service 3880ab
			filter_dev = *argv;
Packit Service 3880ab
		}
Packit Service 3880ab
		argc--; argv++;
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	if (filter_dev) {
Packit Service 3880ab
		filter_index = ll_name_to_index(filter_dev);
Packit Service 3880ab
		if (!filter_index)
Packit Service 3880ab
			return nodev(filter_dev);
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	if (show_details) {
Packit Service 3880ab
		if (rtnl_linkdump_req_filter(&rth, PF_BRIDGE,
Packit Service 3880ab
					     (compress_vlans ?
Packit Service 3880ab
					      RTEXT_FILTER_BRVLAN_COMPRESSED :
Packit Service 3880ab
					      RTEXT_FILTER_BRVLAN)) < 0) {
Packit Service 3880ab
			perror("Cannon send dump request");
Packit Service 3880ab
			exit(1);
Packit Service 3880ab
		}
Packit Service 3880ab
	} else {
Packit Service 3880ab
		if (rtnl_linkdump_req(&rth, PF_BRIDGE) < 0) {
Packit Service 3880ab
			perror("Cannon send dump request");
Packit Service 3880ab
			exit(1);
Packit Service 3880ab
		}
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	new_json_obj(json);
Packit Service 3880ab
	if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
Packit Service 3880ab
		fprintf(stderr, "Dump terminated\n");
Packit Service 3880ab
		exit(1);
Packit Service 3880ab
	}
Packit Service 3880ab
Packit Service 3880ab
	delete_json_obj();
Packit Service 3880ab
	fflush(stdout);
Packit Service 3880ab
	return 0;
Packit Service 3880ab
}
Packit Service 3880ab
Packit Service 3880ab
int do_link(int argc, char **argv)
Packit Service 3880ab
{
Packit Service 3880ab
	ll_init_map(&rth);
Packit Service 3880ab
	if (argc > 0) {
Packit Service 3880ab
		if (matches(*argv, "set") == 0 ||
Packit Service 3880ab
		    matches(*argv, "change") == 0)
Packit Service 3880ab
			return brlink_modify(argc-1, argv+1);
Packit Service 3880ab
		if (matches(*argv, "show") == 0 ||
Packit Service 3880ab
		    matches(*argv, "lst") == 0 ||
Packit Service 3880ab
		    matches(*argv, "list") == 0)
Packit Service 3880ab
			return brlink_show(argc-1, argv+1);
Packit Service 3880ab
		if (matches(*argv, "help") == 0)
Packit Service 3880ab
			usage();
Packit Service 3880ab
	} else
Packit Service 3880ab
		return brlink_show(0, NULL);
Packit Service 3880ab
Packit Service 3880ab
	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
Packit Service 3880ab
	exit(-1);
Packit Service 3880ab
}