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 
13 struct slave_attribute {
14 	struct attribute attr;
15 	ssize_t (*show)(struct slave *, char *);
16 };
17 
18 #define SLAVE_ATTR(_name, _mode, _show)				\
19 const 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 
27 static 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 }
38 static SLAVE_ATTR_RO(state);
39 
40 static ssize_t mii_status_show(struct slave *slave, char *buf)
41 {
42 	return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
43 }
44 static SLAVE_ATTR_RO(mii_status);
45 
46 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
47 {
48 	return sprintf(buf, "%d\n", slave->link_failure_count);
49 }
50 static SLAVE_ATTR_RO(link_failure_count);
51 
52 static 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 }
58 static SLAVE_ATTR_RO(perm_hwaddr);
59 
60 static ssize_t queue_id_show(struct slave *slave, char *buf)
61 {
62 	return sprintf(buf, "%d\n", slave->queue_id);
63 }
64 static SLAVE_ATTR_RO(queue_id);
65 
66 static 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 }
79 static SLAVE_ATTR_RO(ad_aggregator_id);
80 
81 static 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 }
94 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
95 
96 static 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 }
109 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
110 
111 static 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 
126 static 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 
135 static const struct sysfs_ops slave_sysfs_ops = {
136 	.show = slave_show,
137 };
138 
139 static struct kobj_type slave_ktype = {
140 #ifdef CONFIG_SYSFS
141 	.sysfs_ops = &slave_sysfs_ops,
142 #endif
143 };
144 
145 int 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 
166 void 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 }
175