[mirror_ubuntu-focal-kernel.git] / net / bridge / br_sysfs_if.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	Sysfs attributes of bridge ports
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Stephen Hemminger		<shemminger@osdl.org>
 */

#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <linux/sched/signal.h>

#include "br_private.h"

struct brport_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct net_bridge_port *, char *);
	int (*store)(struct net_bridge_port *, unsigned long);
	int (*store_raw)(struct net_bridge_port *, char *);
};

#define BRPORT_ATTR_RAW(_name, _mode, _show, _store)			\
const struct brport_attribute brport_attr_##_name = {			\
	.attr		= {.name = __stringify(_name),			\
			   .mode = _mode },				\
	.show		= _show,					\
	.store_raw	= _store,					\
};

#define BRPORT_ATTR(_name, _mode, _show, _store)		\
const struct brport_attribute brport_attr_##_name = { 	        \
	.attr = {.name = __stringify(_name), 			\
		 .mode = _mode },				\
	.show	= _show,					\
	.store	= _store,					\
};

#define BRPORT_ATTR_FLAG(_name, _mask)				\
static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
{								\
	return sprintf(buf, "%d\n", !!(p->flags & _mask));	\
}								\
static int store_##_name(struct net_bridge_port *p, unsigned long v) \
{								\
	return store_flag(p, v, _mask);				\
}								\
static BRPORT_ATTR(_name, 0644,					\
		   show_##_name, store_##_name)

static int store_flag(struct net_bridge_port *p, unsigned long v,
		      unsigned long mask)
{
	unsigned long flags;

	flags = p->flags;

	if (v)
		flags |= mask;
	else
		flags &= ~mask;

	if (flags != p->flags) {
		p->flags = flags;
		br_port_flags_change(p, mask);
	}
	return 0;
}

static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->path_cost);
}

static BRPORT_ATTR(path_cost, 0644,
		   show_path_cost, br_stp_set_path_cost);

static ssize_t show_priority(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->priority);
}

static BRPORT_ATTR(priority, 0644,
			 show_priority, br_stp_set_port_priority);

static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
{
	return br_show_bridge_id(buf, &p->designated_root);
}
static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL);

static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
{
	return br_show_bridge_id(buf, &p->designated_bridge);
}
static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL);

static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->designated_port);
}
static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL);

static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->designated_cost);
}
static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL);

static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "0x%x\n", p->port_id);
}
static BRPORT_ATTR(port_id, 0444, show_port_id, NULL);

static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "0x%x\n", p->port_no);
}

static BRPORT_ATTR(port_no, 0444, show_port_no, NULL);

static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->topology_change_ack);
}
static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL);

static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->config_pending);
}
static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL);

static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->state);
}
static BRPORT_ATTR(state, 0444, show_port_state, NULL);

static ssize_t show_message_age_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
}
static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL);

static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
}
static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL);

static ssize_t show_hold_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
}
static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL);

static int store_flush(struct net_bridge_port *p, unsigned long v)
{
	br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry
	return 0;
}
static BRPORT_ATTR(flush, 0200, NULL, store_flush);

static ssize_t show_group_fwd_mask(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%#x\n", p->group_fwd_mask);
}

static int store_group_fwd_mask(struct net_bridge_port *p,
				unsigned long v)
{
	if (v & BR_GROUPFWD_MACPAUSE)
		return -EINVAL;
	p->group_fwd_mask = v;

	return 0;
}
static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask,
		   store_group_fwd_mask);

static ssize_t show_backup_port(struct net_bridge_port *p, char *buf)
{
	struct net_bridge_port *backup_p;
	int ret = 0;

	rcu_read_lock();
	backup_p = rcu_dereference(p->backup_port);
	if (backup_p)
		ret = sprintf(buf, "%s\n", backup_p->dev->name);
	rcu_read_unlock();

	return ret;
}

static int store_backup_port(struct net_bridge_port *p, char *buf)
{
	struct net_device *backup_dev = NULL;
	char *nl = strchr(buf, '\n');

	if (nl)
		*nl = '\0';

	if (strlen(buf) > 0) {
		backup_dev = __dev_get_by_name(dev_net(p->dev), buf);
		if (!backup_dev)
			return -ENOENT;
	}

	return nbp_backup_change(p, backup_dev);
}
static BRPORT_ATTR_RAW(backup_port, 0644, show_backup_port, store_backup_port);

BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
BRPORT_ATTR_FLAG(learning, BR_LEARNING);
BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
BRPORT_ATTR_FLAG(isolated, BR_ISOLATED);

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->multicast_router);
}

static int store_multicast_router(struct net_bridge_port *p,
				      unsigned long v)
{
	return br_multicast_set_port_router(p, v);
}
static BRPORT_ATTR(multicast_router, 0644, show_multicast_router,
		   store_multicast_router);

BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST);
#endif

static const struct brport_attribute *brport_attrs[] = {
	&brport_attr_path_cost,
	&brport_attr_priority,
	&brport_attr_port_id,
	&brport_attr_port_no,
	&brport_attr_designated_root,
	&brport_attr_designated_bridge,
	&brport_attr_designated_port,
	&brport_attr_designated_cost,
	&brport_attr_state,
	&brport_attr_change_ack,
	&brport_attr_config_pending,
	&brport_attr_message_age_timer,
	&brport_attr_forward_delay_timer,
	&brport_attr_hold_timer,
	&brport_attr_flush,
	&brport_attr_hairpin_mode,
	&brport_attr_bpdu_guard,
	&brport_attr_root_block,
	&brport_attr_learning,
	&brport_attr_unicast_flood,
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	&brport_attr_multicast_router,
	&brport_attr_multicast_fast_leave,
	&brport_attr_multicast_to_unicast,
#endif
	&brport_attr_proxyarp,
	&brport_attr_proxyarp_wifi,
	&brport_attr_multicast_flood,
	&brport_attr_broadcast_flood,
	&brport_attr_group_fwd_mask,
	&brport_attr_neigh_suppress,
	&brport_attr_isolated,
	&brport_attr_backup_port,
	NULL
};

#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)

static ssize_t brport_show(struct kobject *kobj,
			   struct attribute *attr, char *buf)
{
	struct brport_attribute *brport_attr = to_brport_attr(attr);
	struct net_bridge_port *p = kobj_to_brport(kobj);

	if (!brport_attr->show)
		return -EINVAL;

	return brport_attr->show(p, buf);
}

static ssize_t brport_store(struct kobject *kobj,
			    struct attribute *attr,
			    const char *buf, size_t count)
{
	struct brport_attribute *brport_attr = to_brport_attr(attr);
	struct net_bridge_port *p = kobj_to_brport(kobj);
	ssize_t ret = -EINVAL;
	unsigned long val;
	char *endp;

	if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	if (!rtnl_trylock())
		return restart_syscall();

	if (brport_attr->store_raw) {
		char *buf_copy;

		buf_copy = kstrndup(buf, count, GFP_KERNEL);
		if (!buf_copy) {
			ret = -ENOMEM;
			goto out_unlock;
		}
		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);
	}

	if (!ret) {
		br_ifinfo_notify(RTM_NEWLINK, NULL, p);
		ret = count;
	}
out_unlock:
	rtnl_unlock();

	return ret;
}

const struct sysfs_ops brport_sysfs_ops = {
	.show = brport_show,
	.store = brport_store,
};

/*
 * Add sysfs entries to ethernet device added to a bridge.
 * Creates a brport subdirectory with bridge attributes.
 * Puts symlink in bridge's brif subdirectory
 */
int br_sysfs_addif(struct net_bridge_port *p)
{
	struct net_bridge *br = p->br;
	const struct brport_attribute **a;
	int err;

	err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
				SYSFS_BRIDGE_PORT_LINK);
	if (err)
		return err;

	for (a = brport_attrs; *a; ++a) {
		err = sysfs_create_file(&p->kobj, &((*a)->attr));
		if (err)
			return err;
	}

	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);

	return err;
}
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Sysfs attributes of bridge ports
	4	* Linux ethernet bridge
	5	*
	6	* Authors:
	7	* Stephen Hemminger <shemminger@osdl.org>
1da177e4 LT	8	*/
1da177e4 LT	9
4fc268d2	10	#include <linux/capability.h>
1da177e4 LT	11	#include <linux/kernel.h>
	12	#include <linux/netdevice.h>
	13	#include <linux/if_bridge.h>
	14	#include <linux/rtnetlink.h>
	15	#include <linux/spinlock.h>
174cd4b1	16	#include <linux/sched/signal.h>
1da177e4 LT	17
	18	#include "br_private.h"
	19
	20	struct brport_attribute {
	21	struct attribute attr;
	22	ssize_t (show)(struct net_bridge_port , char *);
14f98f25	23	int (store)(struct net_bridge_port , unsigned long);
a5f3ea54 NA	24	int (store_raw)(struct net_bridge_port , char *);
	25	};
	26
	27	#define BRPORT_ATTR_RAW(_name, _mode, _show, _store) \
	28	const struct brport_attribute brport_attr_##_name = { \
	29	.attr = {.name = __stringify(_name), \
	30	.mode = _mode }, \
	31	.show = _show, \
	32	.store_raw = _store, \
1da177e4 LT	33	};
1da177e4 LT	34
31a5b837	35	#define BRPORT_ATTR(_name, _mode, _show, _store) \
5a0d513b	36	const struct brport_attribute brport_attr_##_name = { \
1da177e4	37	.attr = {.name = __stringify(_name), \
7b595756	38	.mode = _mode }, \
1da177e4 LT	39	.show = _show, \
	40	.store = _store, \
	41	};
	42
cd753732	43	#define BRPORT_ATTR_FLAG(_name, _mask) \
	44	static ssize_t show_##_name(struct net_bridge_port p, char buf) \
	45	{ \
	46	return sprintf(buf, "%d\n", !!(p->flags & _mask)); \
	47	} \
	48	static int store_##_name(struct net_bridge_port *p, unsigned long v) \
	49	{ \
63c3a622	50	return store_flag(p, v, _mask); \
cd753732	51	} \
d6444062	52	static BRPORT_ATTR(_name, 0644, \
cd753732	53	show_##_name, store_##_name)
cd753732	54
63c3a622 VY	55	static int store_flag(struct net_bridge_port *p, unsigned long v,
	56	unsigned long mask)
	57	{
e028e4b8 VY	58	unsigned long flags;
	59
	60	flags = p->flags;
63c3a622 VY	61
	62	if (v)
	63	flags \|= mask;
	64	else
	65	flags &= ~mask;
	66
	67	if (flags != p->flags) {
	68	p->flags = flags;
e028e4b8	69	br_port_flags_change(p, mask);
63c3a622 VY	70	}
	71	return 0;
	72	}
cd753732	73
1da177e4 LT	74	static ssize_t show_path_cost(struct net_bridge_port p, char buf)
	75	{
	76	return sprintf(buf, "%d\n", p->path_cost);
	77	}
14f98f25	78
d6444062	79	static BRPORT_ATTR(path_cost, 0644,
14f98f25	80	show_path_cost, br_stp_set_path_cost);
1da177e4 LT	81
	82	static ssize_t show_priority(struct net_bridge_port p, char buf)
	83	{
	84	return sprintf(buf, "%d\n", p->priority);
	85	}
14f98f25	86
d6444062	87	static BRPORT_ATTR(priority, 0644,
14f98f25	88	show_priority, br_stp_set_port_priority);
1da177e4 LT	89
	90	static ssize_t show_designated_root(struct net_bridge_port p, char buf)
	91	{
	92	return br_show_bridge_id(buf, &p->designated_root);
	93	}
d6444062	94	static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL);
1da177e4 LT	95
	96	static ssize_t show_designated_bridge(struct net_bridge_port p, char buf)
	97	{
	98	return br_show_bridge_id(buf, &p->designated_bridge);
	99	}
d6444062	100	static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL);
1da177e4 LT	101
	102	static ssize_t show_designated_port(struct net_bridge_port p, char buf)
	103	{
	104	return sprintf(buf, "%d\n", p->designated_port);
	105	}
d6444062	106	static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL);
1da177e4 LT	107
	108	static ssize_t show_designated_cost(struct net_bridge_port p, char buf)
	109	{
	110	return sprintf(buf, "%d\n", p->designated_cost);
	111	}
d6444062	112	static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL);
1da177e4 LT	113
	114	static ssize_t show_port_id(struct net_bridge_port p, char buf)
	115	{
	116	return sprintf(buf, "0x%x\n", p->port_id);
	117	}
d6444062	118	static BRPORT_ATTR(port_id, 0444, show_port_id, NULL);
1da177e4 LT	119
	120	static ssize_t show_port_no(struct net_bridge_port p, char buf)
	121	{
	122	return sprintf(buf, "0x%x\n", p->port_no);
	123	}
	124
d6444062	125	static BRPORT_ATTR(port_no, 0444, show_port_no, NULL);
1da177e4 LT	126
	127	static ssize_t show_change_ack(struct net_bridge_port p, char buf)
	128	{
	129	return sprintf(buf, "%d\n", p->topology_change_ack);
	130	}
d6444062	131	static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL);
1da177e4 LT	132
	133	static ssize_t show_config_pending(struct net_bridge_port p, char buf)
	134	{
	135	return sprintf(buf, "%d\n", p->config_pending);
	136	}
d6444062	137	static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL);
1da177e4 LT	138
	139	static ssize_t show_port_state(struct net_bridge_port p, char buf)
	140	{
	141	return sprintf(buf, "%d\n", p->state);
	142	}
d6444062	143	static BRPORT_ATTR(state, 0444, show_port_state, NULL);
1da177e4 LT	144
	145	static ssize_t show_message_age_timer(struct net_bridge_port *p,
	146	char *buf)
	147	{
	148	return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
	149	}
d6444062	150	static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL);
1da177e4 LT	151
	152	static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
	153	char *buf)
	154	{
	155	return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
	156	}
d6444062	157	static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL);
1da177e4 LT	158
	159	static ssize_t show_hold_timer(struct net_bridge_port *p,
	160	char *buf)
	161	{
	162	return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
	163	}
d6444062	164	static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL);
1da177e4	165
14f98f25	166	static int store_flush(struct net_bridge_port *p, unsigned long v)
9cf63747	167	{
1ea2d020	168	br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry
9cf63747 SH	169	return 0;
9cf63747 SH	170	}
d6444062	171	static BRPORT_ATTR(flush, 0200, NULL, store_flush);
9cf63747	172
5af48b59 NA	173	static ssize_t show_group_fwd_mask(struct net_bridge_port p, char buf)
	174	{
	175	return sprintf(buf, "%#x\n", p->group_fwd_mask);
	176	}
	177
	178	static int store_group_fwd_mask(struct net_bridge_port *p,
	179	unsigned long v)
	180	{
	181	if (v & BR_GROUPFWD_MACPAUSE)
	182	return -EINVAL;
	183	p->group_fwd_mask = v;
	184
	185	return 0;
	186	}
d6444062	187	static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask,
5af48b59 NA	188	store_group_fwd_mask);
5af48b59 NA	189
2756f68c NA	190	static ssize_t show_backup_port(struct net_bridge_port p, char buf)
	191	{
	192	struct net_bridge_port *backup_p;
	193	int ret = 0;
	194
	195	rcu_read_lock();
	196	backup_p = rcu_dereference(p->backup_port);
	197	if (backup_p)
	198	ret = sprintf(buf, "%s\n", backup_p->dev->name);
	199	rcu_read_unlock();
	200
	201	return ret;
	202	}
	203
	204	static int store_backup_port(struct net_bridge_port p, char buf)
	205	{
	206	struct net_device *backup_dev = NULL;
	207	char *nl = strchr(buf, '\n');
	208
	209	if (nl)
	210	*nl = '\0';
	211
	212	if (strlen(buf) > 0) {
	213	backup_dev = __dev_get_by_name(dev_net(p->dev), buf);
	214	if (!backup_dev)
	215	return -ENOENT;
	216	}
	217
	218	return nbp_backup_change(p, backup_dev);
	219	}
	220	static BRPORT_ATTR_RAW(backup_port, 0644, show_backup_port, store_backup_port);
	221
cd753732	222	BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
a2e01a65	223	BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
1007dd1a	224	BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
9ba18891	225	BRPORT_ATTR_FLAG(learning, BR_LEARNING);
867a5943	226	BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
95850116	227	BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
842a9ae0	228	BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
b6cb5ac8	229	BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
99f906e9	230	BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
821f1b21	231	BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
7d850abd	232	BRPORT_ATTR_FLAG(isolated, BR_ISOLATED);
3982d3d2	233
0909e117 HX	234	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	235	static ssize_t show_multicast_router(struct net_bridge_port p, char buf)
	236	{
	237	return sprintf(buf, "%d\n", p->multicast_router);
	238	}
	239
14f98f25	240	static int store_multicast_router(struct net_bridge_port *p,
0909e117 HX	241	unsigned long v)
	242	{
	243	return br_multicast_set_port_router(p, v);
	244	}
d6444062	245	static BRPORT_ATTR(multicast_router, 0644, show_multicast_router,
0909e117	246	store_multicast_router);
50426b59	247
c2d3babf	248	BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
6db6f0ea	249	BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST);
0909e117 HX	250	#endif
0909e117 HX	251
5a0d513b	252	static const struct brport_attribute *brport_attrs[] = {
1da177e4 LT	253	&brport_attr_path_cost,
	254	&brport_attr_priority,
	255	&brport_attr_port_id,
	256	&brport_attr_port_no,
	257	&brport_attr_designated_root,
	258	&brport_attr_designated_bridge,
	259	&brport_attr_designated_port,
	260	&brport_attr_designated_cost,
	261	&brport_attr_state,
	262	&brport_attr_change_ack,
	263	&brport_attr_config_pending,
	264	&brport_attr_message_age_timer,
	265	&brport_attr_forward_delay_timer,
	266	&brport_attr_hold_timer,
9cf63747	267	&brport_attr_flush,
3982d3d2	268	&brport_attr_hairpin_mode,
a2e01a65	269	&brport_attr_bpdu_guard,
1007dd1a	270	&brport_attr_root_block,
9ba18891	271	&brport_attr_learning,
867a5943	272	&brport_attr_unicast_flood,
0909e117 HX	273	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
0909e117 HX	274	&brport_attr_multicast_router,
50426b59	275	&brport_attr_multicast_fast_leave,
6db6f0ea	276	&brport_attr_multicast_to_unicast,
0909e117	277	#endif
95850116	278	&brport_attr_proxyarp,
842a9ae0	279	&brport_attr_proxyarp_wifi,
4eb6753c	280	&brport_attr_multicast_flood,
99f906e9	281	&brport_attr_broadcast_flood,
5af48b59	282	&brport_attr_group_fwd_mask,
821f1b21	283	&brport_attr_neigh_suppress,
7d850abd	284	&brport_attr_isolated,
2756f68c	285	&brport_attr_backup_port,
1da177e4 LT	286	NULL
	287	};
	288
	289	#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
1da177e4	290
56b148eb	291	static ssize_t brport_show(struct kobject *kobj,
56b148eb	292	struct attribute attr, char buf)
1da177e4	293	{
56b148eb	294	struct brport_attribute *brport_attr = to_brport_attr(attr);
705e0dea	295	struct net_bridge_port *p = kobj_to_brport(kobj);
1da177e4	296
1b12580a XL	297	if (!brport_attr->show)
	298	return -EINVAL;
	299
1da177e4 LT	300	return brport_attr->show(p, buf);
	301	}
	302
56b148eb	303	static ssize_t brport_store(struct kobject *kobj,
	304	struct attribute *attr,
	305	const char *buf, size_t count)
1da177e4	306	{
56b148eb	307	struct brport_attribute *brport_attr = to_brport_attr(attr);
705e0dea	308	struct net_bridge_port *p = kobj_to_brport(kobj);
1da177e4	309	ssize_t ret = -EINVAL;
1da177e4	310	unsigned long val;
a5f3ea54	311	char *endp;
1da177e4	312
cb990503	313	if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	314	return -EPERM;
1da177e4 LT	315
a5f3ea54 NA	316	if (!rtnl_trylock())
	317	return restart_syscall();
	318
a5f3ea54 NA	319	if (brport_attr->store_raw) {
	320	char *buf_copy;
	321
	322	buf_copy = kstrndup(buf, count, GFP_KERNEL);
	323	if (!buf_copy) {
	324	ret = -ENOMEM;
	325	goto out_unlock;
1da177e4	326	}
a5f3ea54 NA	327	spin_lock_bh(&p->br->lock);
	328	ret = brport_attr->store_raw(p, buf_copy);
	329	spin_unlock_bh(&p->br->lock);
	330	kfree(buf_copy);
	331	} else if (brport_attr->store) {
	332	val = simple_strtoul(buf, &endp, 0);
	333	if (endp == buf)
	334	goto out_unlock;
	335	spin_lock_bh(&p->br->lock);
	336	ret = brport_attr->store(p, val);
	337	spin_unlock_bh(&p->br->lock);
1da177e4	338	}
a5f3ea54 NA	339
	340	if (!ret) {
	341	br_ifinfo_notify(RTM_NEWLINK, NULL, p);
	342	ret = count;
	343	}
	344	out_unlock:
	345	rtnl_unlock();
	346
1da177e4 LT	347	return ret;
	348	}
	349
52cf25d0	350	const struct sysfs_ops brport_sysfs_ops = {
1da177e4 LT	351	.show = brport_show,
	352	.store = brport_store,
	353	};
	354
1da177e4 LT	355	/*
	356	* Add sysfs entries to ethernet device added to a bridge.
	357	* Creates a brport subdirectory with bridge attributes.
e0f43752	358	* Puts symlink in bridge's brif subdirectory
1da177e4 LT	359	*/
	360	int br_sysfs_addif(struct net_bridge_port *p)
	361	{
	362	struct net_bridge *br = p->br;
5a0d513b	363	const struct brport_attribute **a;
1da177e4 LT	364	int err;
1da177e4 LT	365
43cb76d9	366	err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
1da177e4 LT	367	SYSFS_BRIDGE_PORT_LINK);
1da177e4 LT	368	if (err)
e0f43752	369	return err;
1da177e4 LT	370
	371	for (a = brport_attrs; *a; ++a) {
	372	err = sysfs_create_file(&p->kobj, &((*a)->attr));
	373	if (err)
e0f43752	374	return err;
1da177e4 LT	375	}
1da177e4 LT	376
e0f43752 SA	377	strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
	378	return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
	379	}
	380
	381	/* Rename bridge's brif symlink */
	382	int br_sysfs_renameif(struct net_bridge_port *p)
	383	{
	384	struct net_bridge *br = p->br;
	385	int err;
	386
	387	/* If a rename fails, the rollback will cause another
	388	* rename call with the existing name.
	389	*/
	390	if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
	391	return 0;
	392
	393	err = sysfs_rename_link(br->ifobj, &p->kobj,
	394	p->sysfs_name, p->dev->name);
	395	if (err)
	396	netdev_notice(br->dev, "unable to rename link %s to %s",
	397	p->sysfs_name, p->dev->name);
	398	else
	399	strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
	400
1da177e4 LT	401	return err;
1da177e4 LT	402	}