xref: /linux/drivers/net/bonding/bond_sysfs_slave.c (revision dd5b2498d845f925904cb2afabb6ba11bfc317c5)
1 /*	Sysfs attributes of bond slaves
2  *
3  *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
4  *
5  *	This program is free software; you can redistribute it and/or
6  *	modify it under the terms of the GNU General Public License
7  *	as published by the Free Software Foundation; either version
8  *	2 of the License, or (at your option) any later version.
9  */
10 
11 #include <linux/capability.h>
12 #include <linux/kernel.h>
13 #include <linux/netdevice.h>
14 
15 #include <net/bonding.h>
16 
17 struct slave_attribute {
18 	struct attribute attr;
19 	ssize_t (*show)(struct slave *, char *);
20 };
21 
22 #define SLAVE_ATTR(_name, _mode, _show)				\
23 const struct slave_attribute slave_attr_##_name = {		\
24 	.attr = {.name = __stringify(_name),			\
25 		 .mode = _mode },				\
26 	.show	= _show,					\
27 };
28 #define SLAVE_ATTR_RO(_name)					\
29 	SLAVE_ATTR(_name, 0444, _name##_show)
30 
31 static ssize_t state_show(struct slave *slave, char *buf)
32 {
33 	switch (bond_slave_state(slave)) {
34 	case BOND_STATE_ACTIVE:
35 		return sprintf(buf, "active\n");
36 	case BOND_STATE_BACKUP:
37 		return sprintf(buf, "backup\n");
38 	default:
39 		return sprintf(buf, "UNKNOWN\n");
40 	}
41 }
42 static SLAVE_ATTR_RO(state);
43 
44 static ssize_t mii_status_show(struct slave *slave, char *buf)
45 {
46 	return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
47 }
48 static SLAVE_ATTR_RO(mii_status);
49 
50 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
51 {
52 	return sprintf(buf, "%d\n", slave->link_failure_count);
53 }
54 static SLAVE_ATTR_RO(link_failure_count);
55 
56 static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
57 {
58 	return sprintf(buf, "%*phC\n",
59 		       slave->dev->addr_len,
60 		       slave->perm_hwaddr);
61 }
62 static SLAVE_ATTR_RO(perm_hwaddr);
63 
64 static ssize_t queue_id_show(struct slave *slave, char *buf)
65 {
66 	return sprintf(buf, "%d\n", slave->queue_id);
67 }
68 static SLAVE_ATTR_RO(queue_id);
69 
70 static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
71 {
72 	const struct aggregator *agg;
73 
74 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
75 		agg = SLAVE_AD_INFO(slave)->port.aggregator;
76 		if (agg)
77 			return sprintf(buf, "%d\n",
78 				       agg->aggregator_identifier);
79 	}
80 
81 	return sprintf(buf, "N/A\n");
82 }
83 static SLAVE_ATTR_RO(ad_aggregator_id);
84 
85 static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
86 {
87 	const struct port *ad_port;
88 
89 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
90 		ad_port = &SLAVE_AD_INFO(slave)->port;
91 		if (ad_port->aggregator)
92 			return sprintf(buf, "%u\n",
93 				       ad_port->actor_oper_port_state);
94 	}
95 
96 	return sprintf(buf, "N/A\n");
97 }
98 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
99 
100 static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
101 {
102 	const struct port *ad_port;
103 
104 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
105 		ad_port = &SLAVE_AD_INFO(slave)->port;
106 		if (ad_port->aggregator)
107 			return sprintf(buf, "%u\n",
108 				       ad_port->partner_oper.port_state);
109 	}
110 
111 	return sprintf(buf, "N/A\n");
112 }
113 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
114 
115 static const struct slave_attribute *slave_attrs[] = {
116 	&slave_attr_state,
117 	&slave_attr_mii_status,
118 	&slave_attr_link_failure_count,
119 	&slave_attr_perm_hwaddr,
120 	&slave_attr_queue_id,
121 	&slave_attr_ad_aggregator_id,
122 	&slave_attr_ad_actor_oper_port_state,
123 	&slave_attr_ad_partner_oper_port_state,
124 	NULL
125 };
126 
127 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
128 #define to_slave(obj)	container_of(obj, struct slave, kobj)
129 
130 static ssize_t slave_show(struct kobject *kobj,
131 			  struct attribute *attr, char *buf)
132 {
133 	struct slave_attribute *slave_attr = to_slave_attr(attr);
134 	struct slave *slave = to_slave(kobj);
135 
136 	return slave_attr->show(slave, buf);
137 }
138 
139 static const struct sysfs_ops slave_sysfs_ops = {
140 	.show = slave_show,
141 };
142 
143 static struct kobj_type slave_ktype = {
144 #ifdef CONFIG_SYSFS
145 	.sysfs_ops = &slave_sysfs_ops,
146 #endif
147 };
148 
149 int bond_sysfs_slave_add(struct slave *slave)
150 {
151 	const struct slave_attribute **a;
152 	int err;
153 
154 	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
155 				   &(slave->dev->dev.kobj), "bonding_slave");
156 	if (err)
157 		return err;
158 
159 	for (a = slave_attrs; *a; ++a) {
160 		err = sysfs_create_file(&slave->kobj, &((*a)->attr));
161 		if (err) {
162 			kobject_put(&slave->kobj);
163 			return err;
164 		}
165 	}
166 
167 	return 0;
168 }
169 
170 void bond_sysfs_slave_del(struct slave *slave)
171 {
172 	const struct slave_attribute **a;
173 
174 	for (a = slave_attrs; *a; ++a)
175 		sysfs_remove_file(&slave->kobj, &((*a)->attr));
176 
177 	kobject_put(&slave->kobj);
178 }
179