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 attribute *slave_attrs[] = {
112	&slave_attr_state.attr,
113	&slave_attr_mii_status.attr,
114	&slave_attr_link_failure_count.attr,
115	&slave_attr_perm_hwaddr.attr,
116	&slave_attr_queue_id.attr,
117	&slave_attr_ad_aggregator_id.attr,
118	&slave_attr_ad_actor_oper_port_state.attr,
119	&slave_attr_ad_partner_oper_port_state.attr,
120	NULL
121};
122
123#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
124
125static ssize_t slave_show(struct kobject *kobj,
126			  struct attribute *attr, char *buf)
127{
128	struct slave_attribute *slave_attr = to_slave_attr(attr);
129	struct slave *slave = to_slave(kobj);
130
131	return slave_attr->show(slave, buf);
132}
133
134const struct sysfs_ops slave_sysfs_ops = {
135	.show = slave_show,
136};
137
138int bond_sysfs_slave_add(struct slave *slave)
139{
140	return sysfs_create_files(&slave->kobj, slave_attrs);
141}
142
143void bond_sysfs_slave_del(struct slave *slave)
144{
145	sysfs_remove_files(&slave->kobj, slave_attrs);
146}
147