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", 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}
141