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(_name, _mode, _show)				\
 19const struct slave_attribute slave_attr_##_name = {		\
 20	.attr = {.name = __stringify(_name),			\
 21		 .mode = _mode },				\
 22	.show	= _show,					\
 23};
 24#define SLAVE_ATTR_RO(_name)					\
 25	SLAVE_ATTR(_name, 0444, _name##_show)
 26
 27static ssize_t state_show(struct slave *slave, char *buf)
 28{
 29	switch (bond_slave_state(slave)) {
 30	case BOND_STATE_ACTIVE:
 31		return sprintf(buf, "active\n");
 32	case BOND_STATE_BACKUP:
 33		return sprintf(buf, "backup\n");
 34	default:
 35		return sprintf(buf, "UNKNOWN\n");
 36	}
 37}
 38static SLAVE_ATTR_RO(state);
 39
 40static ssize_t mii_status_show(struct slave *slave, char *buf)
 41{
 42	return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
 43}
 44static SLAVE_ATTR_RO(mii_status);
 45
 46static ssize_t link_failure_count_show(struct slave *slave, char *buf)
 47{
 48	return sprintf(buf, "%d\n", slave->link_failure_count);
 49}
 50static SLAVE_ATTR_RO(link_failure_count);
 51
 52static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
 53{
 54	return sprintf(buf, "%*phC\n",
 55		       slave->dev->addr_len,
 56		       slave->perm_hwaddr);
 57}
 58static SLAVE_ATTR_RO(perm_hwaddr);
 59
 60static ssize_t queue_id_show(struct slave *slave, char *buf)
 61{
 62	return sprintf(buf, "%d\n", slave->queue_id);
 63}
 64static SLAVE_ATTR_RO(queue_id);
 65
 66static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
 67{
 68	const struct aggregator *agg;
 69
 70	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 71		agg = SLAVE_AD_INFO(slave)->port.aggregator;
 72		if (agg)
 73			return sprintf(buf, "%d\n",
 74				       agg->aggregator_identifier);
 75	}
 76
 77	return sprintf(buf, "N/A\n");
 78}
 79static SLAVE_ATTR_RO(ad_aggregator_id);
 80
 81static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
 82{
 83	const struct port *ad_port;
 84
 85	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 86		ad_port = &SLAVE_AD_INFO(slave)->port;
 87		if (ad_port->aggregator)
 88			return sprintf(buf, "%u\n",
 89				       ad_port->actor_oper_port_state);
 90	}
 91
 92	return sprintf(buf, "N/A\n");
 93}
 94static SLAVE_ATTR_RO(ad_actor_oper_port_state);
 95
 96static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
 97{
 98	const struct port *ad_port;
 99
100	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
101		ad_port = &SLAVE_AD_INFO(slave)->port;
102		if (ad_port->aggregator)
103			return sprintf(buf, "%u\n",
104				       ad_port->partner_oper.port_state);
105	}
106
107	return sprintf(buf, "N/A\n");
108}
109static SLAVE_ATTR_RO(ad_partner_oper_port_state);
110
111static const struct slave_attribute *slave_attrs[] = {
112	&slave_attr_state,
113	&slave_attr_mii_status,
114	&slave_attr_link_failure_count,
115	&slave_attr_perm_hwaddr,
116	&slave_attr_queue_id,
117	&slave_attr_ad_aggregator_id,
118	&slave_attr_ad_actor_oper_port_state,
119	&slave_attr_ad_partner_oper_port_state,
120	NULL
121};
122
123#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
124#define to_slave(obj)	container_of(obj, struct slave, kobj)
125
126static ssize_t slave_show(struct kobject *kobj,
127			  struct attribute *attr, char *buf)
128{
129	struct slave_attribute *slave_attr = to_slave_attr(attr);
130	struct slave *slave = to_slave(kobj);
131
132	return slave_attr->show(slave, buf);
133}
134
135static const struct sysfs_ops slave_sysfs_ops = {
136	.show = slave_show,
137};
138
139static struct kobj_type slave_ktype = {
140#ifdef CONFIG_SYSFS
141	.sysfs_ops = &slave_sysfs_ops,
142#endif
143};
144
145int bond_sysfs_slave_add(struct slave *slave)
146{
147	const struct slave_attribute **a;
148	int err;
149
150	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
151				   &(slave->dev->dev.kobj), "bonding_slave");
152	if (err)
153		return err;
154
155	for (a = slave_attrs; *a; ++a) {
156		err = sysfs_create_file(&slave->kobj, &((*a)->attr));
157		if (err) {
158			kobject_put(&slave->kobj);
159			return err;
160		}
161	}
162
163	return 0;
164}
165
166void bond_sysfs_slave_del(struct slave *slave)
167{
168	const struct slave_attribute **a;
169
170	for (a = slave_attrs; *a; ++a)
171		sysfs_remove_file(&slave->kobj, &((*a)->attr));
172
173	kobject_put(&slave->kobj);
174}