Blame ip/iplink_bridge_slave.c

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/*
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 * iplink_bridge_slave.c	Bridge slave device support
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 *
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 *              This program is free software; you can redistribute it and/or
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 *              modify it under the terms of the GNU General Public License
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 *              as published by the Free Software Foundation; either version
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 *              2 of the License, or (at your option) any later version.
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 *
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 * Authors:     Jiri Pirko <jiri@resnulli.us>
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 */
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#include <stdio.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <linux/if_link.h>
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#include <linux/if_bridge.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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static void print_explain(FILE *f)
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{
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	fprintf(f,
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		"Usage: ... bridge_slave [ fdb_flush ]\n"
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		"			[ state STATE ]\n"
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		"			[ priority PRIO ]\n"
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		"			[ cost COST ]\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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		"			[ flood {on | off} ]\n"
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		"			[ proxy_arp {on | off} ]\n"
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		"			[ proxy_arp_wifi {on | off} ]\n"
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		"			[ mcast_router MULTICAST_ROUTER ]\n"
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		"			[ mcast_fast_leave {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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		"			[ group_fwd_mask MASK ]\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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		"			[ backup_port DEVICE ] [ nobackup_port ]\n"
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	);
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}
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static void explain(void)
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{
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	print_explain(stderr);
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}
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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 *fwd_mask_tbl[16] = {
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	[0]	= "stp",
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	[2]	= "lacp",
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	[14]	= "lldp"
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};
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static void print_portstate(FILE *f, __u8 state)
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{
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	if (state <= BR_STATE_BLOCKING)
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		print_string(PRINT_ANY,
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			     "state",
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			     "state %s ",
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			     port_states[state]);
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	else
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		print_int(PRINT_ANY, "state_index", "state (%d) ", state);
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}
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static void _print_onoff(FILE *f, char *json_flag, 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(f, "%s %s ", flag, val ? "on" : "off");
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}
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static void _print_timer(FILE *f, const char *attr, struct rtattr *timer)
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{
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	struct timeval tv;
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	__jiffies_to_tv(&tv, rta_getattr_u64(timer));
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	if (is_json_context()) {
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		json_writer_t *jw = get_json_writer();
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		jsonw_name(jw, attr);
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		jsonw_printf(jw, "%i.%.2i",
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			     (int)tv.tv_sec, (int)tv.tv_usec / 10000);
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	} else {
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		fprintf(f, "%s %4i.%.2i ", attr, (int)tv.tv_sec,
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			(int)tv.tv_usec / 10000);
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	}
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}
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static void _bitmask2str(__u16 bitmask, char *dst, size_t dst_size,
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			 const char **tbl)
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{
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	int len, i;
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	for (i = 0, len = 0; bitmask; i++, bitmask >>= 1) {
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		if (bitmask & 0x1) {
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			if (tbl[i])
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				len += snprintf(dst + len, dst_size - len, "%s,",
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						tbl[i]);
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			else
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				len += snprintf(dst + len, dst_size - len, "0x%x,",
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						(1 << i));
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		}
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	}
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	if (!len)
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		snprintf(dst, dst_size, "0x0");
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	else
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		dst[len - 1] = 0;
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}
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static void bridge_slave_print_opt(struct link_util *lu, FILE *f,
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				   struct rtattr *tb[])
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{
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	if (!tb)
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		return;
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	if (tb[IFLA_BRPORT_STATE])
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		print_portstate(f, rta_getattr_u8(tb[IFLA_BRPORT_STATE]));
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	if (tb[IFLA_BRPORT_PRIORITY])
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		print_int(PRINT_ANY,
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			  "priority",
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			  "priority %d ",
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			  rta_getattr_u16(tb[IFLA_BRPORT_PRIORITY]));
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	if (tb[IFLA_BRPORT_COST])
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		print_int(PRINT_ANY,
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			  "cost",
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			  "cost %d ",
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			  rta_getattr_u32(tb[IFLA_BRPORT_COST]));
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	if (tb[IFLA_BRPORT_MODE])
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		_print_onoff(f, "mode", "hairpin",
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			     rta_getattr_u8(tb[IFLA_BRPORT_MODE]));
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	if (tb[IFLA_BRPORT_GUARD])
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		_print_onoff(f, "guard", "guard",
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			     rta_getattr_u8(tb[IFLA_BRPORT_GUARD]));
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	if (tb[IFLA_BRPORT_PROTECT])
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		_print_onoff(f, "protect", "root_block",
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			     rta_getattr_u8(tb[IFLA_BRPORT_PROTECT]));
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	if (tb[IFLA_BRPORT_FAST_LEAVE])
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		_print_onoff(f, "fast_leave", "fastleave",
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			     rta_getattr_u8(tb[IFLA_BRPORT_FAST_LEAVE]));
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	if (tb[IFLA_BRPORT_LEARNING])
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		_print_onoff(f, "learning", "learning",
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			     rta_getattr_u8(tb[IFLA_BRPORT_LEARNING]));
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	if (tb[IFLA_BRPORT_UNICAST_FLOOD])
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		_print_onoff(f, "unicast_flood", "flood",
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			     rta_getattr_u8(tb[IFLA_BRPORT_UNICAST_FLOOD]));
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	if (tb[IFLA_BRPORT_ID])
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		print_0xhex(PRINT_ANY, "id", "port_id %#llx ",
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			    rta_getattr_u16(tb[IFLA_BRPORT_ID]));
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	if (tb[IFLA_BRPORT_NO])
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		print_0xhex(PRINT_ANY, "no", "port_no %#llx ",
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			   rta_getattr_u16(tb[IFLA_BRPORT_NO]));
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	if (tb[IFLA_BRPORT_DESIGNATED_PORT])
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		print_uint(PRINT_ANY,
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			   "designated_port",
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			   "designated_port %u ",
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			   rta_getattr_u16(tb[IFLA_BRPORT_DESIGNATED_PORT]));
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	if (tb[IFLA_BRPORT_DESIGNATED_COST])
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		print_uint(PRINT_ANY,
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			   "designated_cost",
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			   "designated_cost %u ",
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			   rta_getattr_u16(tb[IFLA_BRPORT_DESIGNATED_COST]));
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	if (tb[IFLA_BRPORT_BRIDGE_ID]) {
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		char bridge_id[32];
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		br_dump_bridge_id(RTA_DATA(tb[IFLA_BRPORT_BRIDGE_ID]),
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				  bridge_id, sizeof(bridge_id));
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		print_string(PRINT_ANY,
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			     "bridge_id",
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			     "designated_bridge %s ",
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			     bridge_id);
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	}
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	if (tb[IFLA_BRPORT_ROOT_ID]) {
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		char root_id[32];
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		br_dump_bridge_id(RTA_DATA(tb[IFLA_BRPORT_ROOT_ID]),
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				  root_id, sizeof(root_id));
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		print_string(PRINT_ANY,
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			     "root_id",
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			     "designated_root %s ", root_id);
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	}
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	if (tb[IFLA_BRPORT_HOLD_TIMER])
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		_print_timer(f, "hold_timer", tb[IFLA_BRPORT_HOLD_TIMER]);
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	if (tb[IFLA_BRPORT_MESSAGE_AGE_TIMER])
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		_print_timer(f, "message_age_timer",
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			     tb[IFLA_BRPORT_MESSAGE_AGE_TIMER]);
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	if (tb[IFLA_BRPORT_FORWARD_DELAY_TIMER])
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		_print_timer(f, "forward_delay_timer",
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			     tb[IFLA_BRPORT_FORWARD_DELAY_TIMER]);
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	if (tb[IFLA_BRPORT_TOPOLOGY_CHANGE_ACK])
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		print_uint(PRINT_ANY,
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			   "topology_change_ack",
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			   "topology_change_ack %u ",
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			   rta_getattr_u8(tb[IFLA_BRPORT_TOPOLOGY_CHANGE_ACK]));
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	if (tb[IFLA_BRPORT_CONFIG_PENDING])
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		print_uint(PRINT_ANY,
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			   "config_pending",
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			   "config_pending %u ",
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			   rta_getattr_u8(tb[IFLA_BRPORT_CONFIG_PENDING]));
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	if (tb[IFLA_BRPORT_PROXYARP])
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		_print_onoff(f, "proxyarp", "proxy_arp",
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			     rta_getattr_u8(tb[IFLA_BRPORT_PROXYARP]));
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	if (tb[IFLA_BRPORT_PROXYARP_WIFI])
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		_print_onoff(f, "proxyarp_wifi", "proxy_arp_wifi",
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			     rta_getattr_u8(tb[IFLA_BRPORT_PROXYARP_WIFI]));
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	if (tb[IFLA_BRPORT_MULTICAST_ROUTER])
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		print_uint(PRINT_ANY,
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			   "multicast_router",
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			   "mcast_router %u ",
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			   rta_getattr_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]));
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	if (tb[IFLA_BRPORT_FAST_LEAVE])
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		// not printing any json here because
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		// we already printed fast_leave before
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		print_string(PRINT_FP,
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			     NULL,
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			     "mcast_fast_leave %s ",
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			     rta_getattr_u8(tb[IFLA_BRPORT_FAST_LEAVE]) ? "on" : "off");
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	if (tb[IFLA_BRPORT_MCAST_FLOOD])
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		_print_onoff(f, "mcast_flood", "mcast_flood",
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			     rta_getattr_u8(tb[IFLA_BRPORT_MCAST_FLOOD]));
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	if (tb[IFLA_BRPORT_MCAST_TO_UCAST])
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		_print_onoff(f, "mcast_to_unicast", "mcast_to_unicast",
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			     rta_getattr_u8(tb[IFLA_BRPORT_MCAST_TO_UCAST]));
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	if (tb[IFLA_BRPORT_NEIGH_SUPPRESS])
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		_print_onoff(f, "neigh_suppress", "neigh_suppress",
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			     rta_getattr_u8(tb[IFLA_BRPORT_NEIGH_SUPPRESS]));
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	if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
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		char convbuf[256];
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		__u16 fwd_mask;
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		fwd_mask = rta_getattr_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
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		print_0xhex(PRINT_ANY, "group_fwd_mask",
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			    "group_fwd_mask %#llx ", fwd_mask);
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		_bitmask2str(fwd_mask, convbuf, sizeof(convbuf), fwd_mask_tbl);
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		print_string(PRINT_ANY, "group_fwd_mask_str",
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			     "group_fwd_mask_str %s ", convbuf);
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	}
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	if (tb[IFLA_BRPORT_VLAN_TUNNEL])
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		_print_onoff(f, "vlan_tunnel", "vlan_tunnel",
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			     rta_getattr_u8(tb[IFLA_BRPORT_VLAN_TUNNEL]));
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	if (tb[IFLA_BRPORT_ISOLATED])
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		_print_onoff(f, "isolated", "isolated",
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			     rta_getattr_u8(tb[IFLA_BRPORT_ISOLATED]));
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	if (tb[IFLA_BRPORT_BACKUP_PORT]) {
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		int backup_p = rta_getattr_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
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		print_string(PRINT_ANY, "backup_port", "backup_port %s ",
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			     ll_index_to_name(backup_p));
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	}
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}
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static void bridge_slave_parse_on_off(char *arg_name, char *arg_val,
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				      struct nlmsghdr *n, int type)
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{
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	__u8 val;
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	if (strcmp(arg_val, "on") == 0)
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		val = 1;
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	else if (strcmp(arg_val, "off") == 0)
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		val = 0;
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	else
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		invarg("should be \"on\" or \"off\"", arg_name);
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	addattr8(n, 1024, type, val);
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}
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static int bridge_slave_parse_opt(struct link_util *lu, int argc, char **argv,
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				  struct nlmsghdr *n)
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{
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	__u8 state;
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	__u16 priority;
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	__u32 cost;
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	while (argc > 0) {
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		if (matches(*argv, "fdb_flush") == 0) {
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			addattr(n, 1024, IFLA_BRPORT_FLUSH);
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		} else if (matches(*argv, "state") == 0) {
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			NEXT_ARG();
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			if (get_u8(&state, *argv, 0))
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				invarg("state is invalid", *argv);
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			addattr8(n, 1024, IFLA_BRPORT_STATE, state);
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		} else if (matches(*argv, "priority") == 0) {
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			NEXT_ARG();
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			if (get_u16(&priority, *argv, 0))
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				invarg("priority is invalid", *argv);
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			addattr16(n, 1024, IFLA_BRPORT_PRIORITY, priority);
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		} else if (matches(*argv, "cost") == 0) {
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			NEXT_ARG();
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			if (get_u32(&cost, *argv, 0))
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				invarg("cost is invalid", *argv);
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			addattr32(n, 1024, IFLA_BRPORT_COST, cost);
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		} else if (matches(*argv, "hairpin") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("hairpin", *argv, n,
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						  IFLA_BRPORT_MODE);
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		} else if (matches(*argv, "guard") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("guard", *argv, n,
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						  IFLA_BRPORT_GUARD);
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		} else if (matches(*argv, "root_block") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("root_block", *argv, n,
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						  IFLA_BRPORT_PROTECT);
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		} else if (matches(*argv, "fastleave") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("fastleave", *argv, n,
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						  IFLA_BRPORT_FAST_LEAVE);
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		} else if (matches(*argv, "learning") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("learning", *argv, n,
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						  IFLA_BRPORT_LEARNING);
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		} else if (matches(*argv, "flood") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("flood", *argv, n,
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						  IFLA_BRPORT_UNICAST_FLOOD);
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		} else if (matches(*argv, "mcast_flood") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("mcast_flood", *argv, n,
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						  IFLA_BRPORT_MCAST_FLOOD);
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		} else if (matches(*argv, "mcast_to_unicast") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("mcast_to_unicast", *argv, n,
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						  IFLA_BRPORT_MCAST_TO_UCAST);
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		} else if (matches(*argv, "proxy_arp") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("proxy_arp", *argv, n,
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						  IFLA_BRPORT_PROXYARP);
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		} else if (matches(*argv, "proxy_arp_wifi") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("proxy_arp_wifi", *argv, n,
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						  IFLA_BRPORT_PROXYARP_WIFI);
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		} else if (matches(*argv, "mcast_router") == 0) {
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			__u8 mcast_router;
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			NEXT_ARG();
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			if (get_u8(&mcast_router, *argv, 0))
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				invarg("invalid mcast_router", *argv);
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			addattr8(n, 1024, IFLA_BRPORT_MULTICAST_ROUTER,
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				 mcast_router);
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		} else if (matches(*argv, "mcast_fast_leave") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("mcast_fast_leave", *argv, n,
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						  IFLA_BRPORT_FAST_LEAVE);
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		} else if (matches(*argv, "neigh_suppress") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("neigh_suppress", *argv, n,
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						  IFLA_BRPORT_NEIGH_SUPPRESS);
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		} else if (matches(*argv, "group_fwd_mask") == 0) {
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			__u16 mask;
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			NEXT_ARG();
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			if (get_u16(&mask, *argv, 0))
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				invarg("invalid group_fwd_mask", *argv);
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			addattr16(n, 1024, IFLA_BRPORT_GROUP_FWD_MASK, mask);
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		} else if (matches(*argv, "vlan_tunnel") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("vlan_tunnel", *argv, n,
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						  IFLA_BRPORT_VLAN_TUNNEL);
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		} else if (matches(*argv, "isolated") == 0) {
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			NEXT_ARG();
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			bridge_slave_parse_on_off("isolated", *argv, n,
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						  IFLA_BRPORT_ISOLATED);
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		} else if (matches(*argv, "backup_port") == 0) {
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			int ifindex;
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			NEXT_ARG();
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			ifindex = ll_name_to_index(*argv);
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			if (!ifindex)
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				invarg("Device does not exist\n", *argv);
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			addattr32(n, 1024, IFLA_BRPORT_BACKUP_PORT, ifindex);
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		} else if (matches(*argv, "nobackup_port") == 0) {
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			addattr32(n, 1024, IFLA_BRPORT_BACKUP_PORT, 0);
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		} else if (matches(*argv, "help") == 0) {
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			explain();
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			return -1;
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		} else {
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			fprintf(stderr, "bridge_slave: unknown option \"%s\"?\n",
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				*argv);
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			explain();
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			return -1;
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		}
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		argc--, argv++;
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	}
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	return 0;
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}
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static void bridge_slave_print_help(struct link_util *lu, int argc, char **argv,
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		FILE *f)
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{
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	print_explain(f);
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}
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struct link_util bridge_slave_link_util = {
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	.id		= "bridge_slave",
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	.maxattr	= IFLA_BRPORT_MAX,
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	.print_opt	= bridge_slave_print_opt,
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	.parse_opt	= bridge_slave_parse_opt,
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	.print_help     = bridge_slave_print_help,
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	.parse_ifla_xstats = bridge_parse_xstats,
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	.print_ifla_xstats = bridge_print_xstats,
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};