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_RO(_name)					\
19 const struct slave_attribute slave_attr_##_name = __ATTR_RO(_name)
20 
21 static ssize_t state_show(struct slave *slave, char *buf)
22 {
23 	switch (bond_slave_state(slave)) {
24 	case BOND_STATE_ACTIVE:
25 		return sprintf(buf, "active\n");
26 	case BOND_STATE_BACKUP:
27 		return sprintf(buf, "backup\n");
28 	default:
29 		return sprintf(buf, "UNKNOWN\n");
30 	}
31 }
32 static SLAVE_ATTR_RO(state);
33 
34 static ssize_t mii_status_show(struct slave *slave, char *buf)
35 {
36 	return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
37 }
38 static SLAVE_ATTR_RO(mii_status);
39 
40 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
41 {
42 	return sprintf(buf, "%d\n", slave->link_failure_count);
43 }
44 static SLAVE_ATTR_RO(link_failure_count);
45 
46 static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
47 {
48 	return sprintf(buf, "%*phC\n",
49 		       slave->dev->addr_len,
50 		       slave->perm_hwaddr);
51 }
52 static SLAVE_ATTR_RO(perm_hwaddr);
53 
54 static ssize_t queue_id_show(struct slave *slave, char *buf)
55 {
56 	return sprintf(buf, "%d\n", slave->queue_id);
57 }
58 static SLAVE_ATTR_RO(queue_id);
59 
60 static 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 sprintf(buf, "%d\n",
68 				       agg->aggregator_identifier);
69 	}
70 
71 	return sprintf(buf, "N/A\n");
72 }
73 static SLAVE_ATTR_RO(ad_aggregator_id);
74 
75 static 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 sprintf(buf, "%u\n",
83 				       ad_port->actor_oper_port_state);
84 	}
85 
86 	return sprintf(buf, "N/A\n");
87 }
88 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
89 
90 static 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 sprintf(buf, "%u\n",
98 				       ad_port->partner_oper.port_state);
99 	}
100 
101 	return sprintf(buf, "N/A\n");
102 }
103 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
104 
105 static 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 
119 static 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 
128 const struct sysfs_ops slave_sysfs_ops = {
129 	.show = slave_show,
130 };
131 
132 int bond_sysfs_slave_add(struct slave *slave)
133 {
134 	return sysfs_create_files(&slave->kobj, slave_attrs);
135 }
136 
137 void bond_sysfs_slave_del(struct slave *slave)
138 {
139 	sysfs_remove_files(&slave->kobj, slave_attrs);
140 }
141