2005-04-17 06:20:36 +08:00
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/*
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* Sysfs attributes of bridge ports
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* Linux ethernet bridge
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*
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* Authors:
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* Stephen Hemminger <shemminger@osdl.org>
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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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2006-01-12 04:17:47 +08:00
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#include <linux/capability.h>
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2005-04-17 06:20:36 +08:00
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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2017-02-03 02:15:33 +08:00
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#include <linux/sched/signal.h>
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2005-04-17 06:20:36 +08:00
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#include "br_private.h"
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struct brport_attribute {
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struct attribute attr;
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ssize_t (*show)(struct net_bridge_port *, char *);
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2011-04-04 22:03:33 +08:00
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int (*store)(struct net_bridge_port *, unsigned long);
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2018-07-23 16:16:58 +08:00
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int (*store_raw)(struct net_bridge_port *, char *);
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};
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#define BRPORT_ATTR_RAW(_name, _mode, _show, _store) \
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const struct brport_attribute brport_attr_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = _mode }, \
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.show = _show, \
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.store_raw = _store, \
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2005-04-17 06:20:36 +08:00
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};
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2013-12-19 13:28:12 +08:00
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#define BRPORT_ATTR(_name, _mode, _show, _store) \
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2012-07-30 16:55:49 +08:00
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const struct brport_attribute brport_attr_##_name = { \
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2005-04-17 06:20:36 +08:00
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.attr = {.name = __stringify(_name), \
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2007-06-14 02:45:17 +08:00
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.mode = _mode }, \
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2005-04-17 06:20:36 +08:00
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.show = _show, \
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.store = _store, \
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};
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2012-11-13 15:53:06 +08:00
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#define BRPORT_ATTR_FLAG(_name, _mask) \
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static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
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{ \
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return sprintf(buf, "%d\n", !!(p->flags & _mask)); \
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} \
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static int store_##_name(struct net_bridge_port *p, unsigned long v) \
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{ \
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2014-05-16 21:59:15 +08:00
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return store_flag(p, v, _mask); \
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2012-11-13 15:53:06 +08:00
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} \
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(_name, 0644, \
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2012-11-13 15:53:06 +08:00
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show_##_name, store_##_name)
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2014-05-16 21:59:15 +08:00
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static int store_flag(struct net_bridge_port *p, unsigned long v,
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unsigned long mask)
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{
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2014-05-16 21:59:16 +08:00
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unsigned long flags;
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flags = p->flags;
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2014-05-16 21:59:15 +08:00
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if (v)
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flags |= mask;
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else
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flags &= ~mask;
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if (flags != p->flags) {
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p->flags = flags;
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2014-05-16 21:59:16 +08:00
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br_port_flags_change(p, mask);
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2014-05-16 21:59:15 +08:00
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}
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return 0;
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}
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2012-11-13 15:53:06 +08:00
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2005-04-17 06:20:36 +08:00
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static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->path_cost);
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}
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2011-04-04 22:03:33 +08:00
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(path_cost, 0644,
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2011-04-04 22:03:33 +08:00
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show_path_cost, br_stp_set_path_cost);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_priority(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->priority);
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}
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2011-04-04 22:03:33 +08:00
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(priority, 0644,
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2011-04-04 22:03:33 +08:00
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show_priority, br_stp_set_port_priority);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
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{
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return br_show_bridge_id(buf, &p->designated_root);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
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{
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return br_show_bridge_id(buf, &p->designated_bridge);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->designated_port);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->designated_cost);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "0x%x\n", p->port_id);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(port_id, 0444, show_port_id, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "0x%x\n", p->port_no);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(port_no, 0444, show_port_no, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->topology_change_ack);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->config_pending);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->state);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(state, 0444, show_port_state, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_message_age_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL);
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2005-04-17 06:20:36 +08:00
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static ssize_t show_hold_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL);
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2005-04-17 06:20:36 +08:00
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2011-04-04 22:03:33 +08:00
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static int store_flush(struct net_bridge_port *p, unsigned long v)
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2007-04-10 03:57:54 +08:00
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{
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2015-06-23 20:28:16 +08:00
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br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry
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2007-04-10 03:57:54 +08:00
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return 0;
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(flush, 0200, NULL, store_flush);
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2007-04-10 03:57:54 +08:00
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2017-09-27 21:12:44 +08:00
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static ssize_t show_group_fwd_mask(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%#x\n", p->group_fwd_mask);
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}
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static int store_group_fwd_mask(struct net_bridge_port *p,
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unsigned long v)
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{
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if (v & BR_GROUPFWD_MACPAUSE)
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return -EINVAL;
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p->group_fwd_mask = v;
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return 0;
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask,
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2017-09-27 21:12:44 +08:00
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store_group_fwd_mask);
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2018-07-23 16:16:59 +08:00
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static ssize_t show_backup_port(struct net_bridge_port *p, char *buf)
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{
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struct net_bridge_port *backup_p;
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int ret = 0;
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rcu_read_lock();
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backup_p = rcu_dereference(p->backup_port);
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if (backup_p)
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ret = sprintf(buf, "%s\n", backup_p->dev->name);
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rcu_read_unlock();
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return ret;
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}
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static int store_backup_port(struct net_bridge_port *p, char *buf)
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{
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struct net_device *backup_dev = NULL;
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char *nl = strchr(buf, '\n');
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if (nl)
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*nl = '\0';
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if (strlen(buf) > 0) {
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backup_dev = __dev_get_by_name(dev_net(p->dev), buf);
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if (!backup_dev)
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return -ENOENT;
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}
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return nbp_backup_change(p, backup_dev);
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}
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static BRPORT_ATTR_RAW(backup_port, 0644, show_backup_port, store_backup_port);
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2012-11-13 15:53:06 +08:00
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BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
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2012-11-13 15:53:07 +08:00
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BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
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2012-11-13 15:53:08 +08:00
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BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
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2013-06-05 22:08:00 +08:00
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BRPORT_ATTR_FLAG(learning, BR_LEARNING);
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2013-06-05 22:08:01 +08:00
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BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
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2014-10-24 05:49:17 +08:00
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BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
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2015-03-04 18:54:21 +08:00
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BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
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2016-08-31 21:36:52 +08:00
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BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
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2017-04-26 21:48:09 +08:00
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BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
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2017-10-07 13:12:37 +08:00
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BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
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2018-05-24 16:56:48 +08:00
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BRPORT_ATTR_FLAG(isolated, BR_ISOLATED);
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2009-08-13 14:55:16 +08:00
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2010-02-28 03:41:49 +08:00
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->multicast_router);
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}
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2011-04-04 22:03:33 +08:00
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static int store_multicast_router(struct net_bridge_port *p,
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2010-02-28 03:41:49 +08:00
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unsigned long v)
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{
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return br_multicast_set_port_router(p, v);
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}
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2018-03-24 06:54:38 +08:00
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static BRPORT_ATTR(multicast_router, 0644, show_multicast_router,
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2010-02-28 03:41:49 +08:00
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store_multicast_router);
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2012-12-04 07:56:40 +08:00
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2012-12-06 05:24:45 +08:00
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BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
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2017-01-22 04:01:32 +08:00
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BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST);
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2010-02-28 03:41:49 +08:00
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#endif
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2012-07-30 16:55:49 +08:00
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static const struct brport_attribute *brport_attrs[] = {
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2005-04-17 06:20:36 +08:00
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&brport_attr_path_cost,
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&brport_attr_priority,
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&brport_attr_port_id,
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&brport_attr_port_no,
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&brport_attr_designated_root,
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&brport_attr_designated_bridge,
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&brport_attr_designated_port,
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&brport_attr_designated_cost,
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&brport_attr_state,
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&brport_attr_change_ack,
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&brport_attr_config_pending,
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&brport_attr_message_age_timer,
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&brport_attr_forward_delay_timer,
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&brport_attr_hold_timer,
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2007-04-10 03:57:54 +08:00
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&brport_attr_flush,
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2009-08-13 14:55:16 +08:00
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&brport_attr_hairpin_mode,
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2012-11-13 15:53:07 +08:00
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&brport_attr_bpdu_guard,
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2012-11-13 15:53:08 +08:00
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&brport_attr_root_block,
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2013-06-05 22:08:00 +08:00
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&brport_attr_learning,
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2013-06-05 22:08:01 +08:00
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&brport_attr_unicast_flood,
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2010-02-28 03:41:49 +08:00
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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&brport_attr_multicast_router,
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2012-12-04 07:56:40 +08:00
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&brport_attr_multicast_fast_leave,
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2017-01-22 04:01:32 +08:00
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&brport_attr_multicast_to_unicast,
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2010-02-28 03:41:49 +08:00
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#endif
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2014-10-24 05:49:17 +08:00
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&brport_attr_proxyarp,
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2015-03-04 18:54:21 +08:00
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|
|
&brport_attr_proxyarp_wifi,
|
2016-10-13 21:20:52 +08:00
|
|
|
&brport_attr_multicast_flood,
|
2017-04-26 21:48:09 +08:00
|
|
|
&brport_attr_broadcast_flood,
|
2017-09-27 21:12:44 +08:00
|
|
|
&brport_attr_group_fwd_mask,
|
2017-10-07 13:12:37 +08:00
|
|
|
&brport_attr_neigh_suppress,
|
2018-05-24 16:56:48 +08:00
|
|
|
&brport_attr_isolated,
|
2018-07-23 16:16:59 +08:00
|
|
|
&brport_attr_backup_port,
|
2005-04-17 06:20:36 +08:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
|
|
|
|
|
2013-12-19 13:28:13 +08:00
|
|
|
static ssize_t brport_show(struct kobject *kobj,
|
|
|
|
struct attribute *attr, char *buf)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2013-12-19 13:28:13 +08:00
|
|
|
struct brport_attribute *brport_attr = to_brport_attr(attr);
|
2018-07-21 05:56:54 +08:00
|
|
|
struct net_bridge_port *p = kobj_to_brport(kobj);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2018-02-12 17:15:40 +08:00
|
|
|
if (!brport_attr->show)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
return brport_attr->show(p, buf);
|
|
|
|
}
|
|
|
|
|
2013-12-19 13:28:13 +08:00
|
|
|
static ssize_t brport_store(struct kobject *kobj,
|
|
|
|
struct attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2013-12-19 13:28:13 +08:00
|
|
|
struct brport_attribute *brport_attr = to_brport_attr(attr);
|
2018-07-21 05:56:54 +08:00
|
|
|
struct net_bridge_port *p = kobj_to_brport(kobj);
|
2005-04-17 06:20:36 +08:00
|
|
|
ssize_t ret = -EINVAL;
|
|
|
|
unsigned long val;
|
2018-07-23 16:16:58 +08:00
|
|
|
char *endp;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-11-16 11:03:08 +08:00
|
|
|
if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
|
2005-04-17 06:20:36 +08:00
|
|
|
return -EPERM;
|
|
|
|
|
2018-07-23 16:16:58 +08:00
|
|
|
if (!rtnl_trylock())
|
|
|
|
return restart_syscall();
|
|
|
|
|
|
|
|
if (!p->dev || !p->br)
|
|
|
|
goto out_unlock;
|
|
|
|
|
|
|
|
if (brport_attr->store_raw) {
|
|
|
|
char *buf_copy;
|
|
|
|
|
|
|
|
buf_copy = kstrndup(buf, count, GFP_KERNEL);
|
|
|
|
if (!buf_copy) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out_unlock;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2018-07-23 16:16:58 +08:00
|
|
|
spin_lock_bh(&p->br->lock);
|
|
|
|
ret = brport_attr->store_raw(p, buf_copy);
|
|
|
|
spin_unlock_bh(&p->br->lock);
|
|
|
|
kfree(buf_copy);
|
|
|
|
} else if (brport_attr->store) {
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
|
|
if (endp == buf)
|
|
|
|
goto out_unlock;
|
|
|
|
spin_lock_bh(&p->br->lock);
|
|
|
|
ret = brport_attr->store(p, val);
|
|
|
|
spin_unlock_bh(&p->br->lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2018-07-23 16:16:58 +08:00
|
|
|
|
|
|
|
if (!ret) {
|
|
|
|
br_ifinfo_notify(RTM_NEWLINK, NULL, p);
|
|
|
|
ret = count;
|
|
|
|
}
|
|
|
|
out_unlock:
|
|
|
|
rtnl_unlock();
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-01-19 09:58:23 +08:00
|
|
|
const struct sysfs_ops brport_sysfs_ops = {
|
2005-04-17 06:20:36 +08:00
|
|
|
.show = brport_show,
|
|
|
|
.store = brport_store,
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add sysfs entries to ethernet device added to a bridge.
|
|
|
|
* Creates a brport subdirectory with bridge attributes.
|
2010-05-10 17:31:11 +08:00
|
|
|
* Puts symlink in bridge's brif subdirectory
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
int br_sysfs_addif(struct net_bridge_port *p)
|
|
|
|
{
|
|
|
|
struct net_bridge *br = p->br;
|
2012-07-30 16:55:49 +08:00
|
|
|
const struct brport_attribute **a;
|
2005-04-17 06:20:36 +08:00
|
|
|
int err;
|
|
|
|
|
2002-04-10 03:14:34 +08:00
|
|
|
err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
|
2005-04-17 06:20:36 +08:00
|
|
|
SYSFS_BRIDGE_PORT_LINK);
|
|
|
|
if (err)
|
2010-05-10 17:31:11 +08:00
|
|
|
return err;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
for (a = brport_attrs; *a; ++a) {
|
|
|
|
err = sysfs_create_file(&p->kobj, &((*a)->attr));
|
|
|
|
if (err)
|
2010-05-10 17:31:11 +08:00
|
|
|
return err;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2010-05-10 17:31:11 +08:00
|
|
|
strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
|
|
|
|
return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Rename bridge's brif symlink */
|
|
|
|
int br_sysfs_renameif(struct net_bridge_port *p)
|
|
|
|
{
|
|
|
|
struct net_bridge *br = p->br;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
/* If a rename fails, the rollback will cause another
|
|
|
|
* rename call with the existing name.
|
|
|
|
*/
|
|
|
|
if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err = sysfs_rename_link(br->ifobj, &p->kobj,
|
|
|
|
p->sysfs_name, p->dev->name);
|
|
|
|
if (err)
|
|
|
|
netdev_notice(br->dev, "unable to rename link %s to %s",
|
|
|
|
p->sysfs_name, p->dev->name);
|
|
|
|
else
|
|
|
|
strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
return err;
|
|
|
|
}
|