1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*	Sysfs attributes of bond slaves
  3 *
  4 *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
  5 */
  6
  7#include <linux/capability.h>
  8#include <linux/kernel.h>
  9#include <linux/netdevice.h>
 10
 11#include <net/bonding.h>
 12
 13struct slave_attribute {
 14	struct attribute attr;
 15	ssize_t (*show)(struct slave *, char *);
 16};
 17
 18#define SLAVE_ATTR_RO(_name)					\
 19const struct slave_attribute slave_attr_##_name = __ATTR_RO(_name)
 20
 21static ssize_t state_show(struct slave *slave, char *buf)
 22{
 23	switch (bond_slave_state(slave)) {
 24	case BOND_STATE_ACTIVE:
 25		return sysfs_emit(buf, "active\n");
 26	case BOND_STATE_BACKUP:
 27		return sysfs_emit(buf, "backup\n");
 28	default:
 29		return sysfs_emit(buf, "UNKNOWN\n");
 30	}
 31}
 32static SLAVE_ATTR_RO(state);
 33
 34static ssize_t mii_status_show(struct slave *slave, char *buf)
 35{
 36	return sysfs_emit(buf, "%s\n", bond_slave_link_status(slave->link));
 37}
 38static SLAVE_ATTR_RO(mii_status);
 39
 40static ssize_t link_failure_count_show(struct slave *slave, char *buf)
 41{
 42	return sysfs_emit(buf, "%d\n", slave->link_failure_count);
 43}
 44static SLAVE_ATTR_RO(link_failure_count);
 45
 46static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
 47{
 48	return sysfs_emit(buf, "%*phC\n",
 49		       slave->dev->addr_len,
 50		       slave->perm_hwaddr);
 51}
 52static SLAVE_ATTR_RO(perm_hwaddr);
 53
 54static ssize_t queue_id_show(struct slave *slave, char *buf)
 55{
 56	return sysfs_emit(buf, "%d\n", READ_ONCE(slave->queue_id));
 57}
 58static SLAVE_ATTR_RO(queue_id);
 59
 60static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
 61{
 62	const struct aggregator *agg;
 63
 64	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 65		agg = SLAVE_AD_INFO(slave)->port.aggregator;
 66		if (agg)
 67			return sysfs_emit(buf, "%d\n",
 68					  agg->aggregator_identifier);
 69	}
 70
 71	return sysfs_emit(buf, "N/A\n");
 72}
 73static SLAVE_ATTR_RO(ad_aggregator_id);
 74
 75static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
 76{
 77	const struct port *ad_port;
 78
 79	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 80		ad_port = &SLAVE_AD_INFO(slave)->port;
 81		if (ad_port->aggregator)
 82			return sysfs_emit(buf, "%u\n",
 83				       ad_port->actor_oper_port_state);
 84	}
 85
 86	return sysfs_emit(buf, "N/A\n");
 87}
 88static SLAVE_ATTR_RO(ad_actor_oper_port_state);
 89
 90static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
 91{
 92	const struct port *ad_port;
 93
 94	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 95		ad_port = &SLAVE_AD_INFO(slave)->port;
 96		if (ad_port->aggregator)
 97			return sysfs_emit(buf, "%u\n",
 98				       ad_port->partner_oper.port_state);
 99	}
100
101	return sysfs_emit(buf, "N/A\n");
102}
103static SLAVE_ATTR_RO(ad_partner_oper_port_state);
104
105static const struct attribute *slave_attrs[] = {
106	&slave_attr_state.attr,
107	&slave_attr_mii_status.attr,
108	&slave_attr_link_failure_count.attr,
109	&slave_attr_perm_hwaddr.attr,
110	&slave_attr_queue_id.attr,
111	&slave_attr_ad_aggregator_id.attr,
112	&slave_attr_ad_actor_oper_port_state.attr,
113	&slave_attr_ad_partner_oper_port_state.attr,
114	NULL
115};
116
117#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
118
119static ssize_t slave_show(struct kobject *kobj,
120			  struct attribute *attr, char *buf)
121{
122	struct slave_attribute *slave_attr = to_slave_attr(attr);
123	struct slave *slave = to_slave(kobj);
124
125	return slave_attr->show(slave, buf);
126}
127
128const struct sysfs_ops slave_sysfs_ops = {
129	.show = slave_show,
130};
131
132int bond_sysfs_slave_add(struct slave *slave)
133{
134	return sysfs_create_files(&slave->kobj, slave_attrs);
135}
136
137void bond_sysfs_slave_del(struct slave *slave)
138{
139	sysfs_remove_files(&slave->kobj, slave_attrs);
140}