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
state_show(struct slave * slave,char * buf)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 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 }
32 static SLAVE_ATTR_RO(state);
33
mii_status_show(struct slave * slave,char * buf)34 static 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 }
38 static SLAVE_ATTR_RO(mii_status);
39
link_failure_count_show(struct slave * slave,char * buf)40 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
41 {
42 return sysfs_emit(buf, "%d\n", slave->link_failure_count);
43 }
44 static SLAVE_ATTR_RO(link_failure_count);
45
perm_hwaddr_show(struct slave * slave,char * buf)46 static 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 }
52 static SLAVE_ATTR_RO(perm_hwaddr);
53
queue_id_show(struct slave * slave,char * buf)54 static ssize_t queue_id_show(struct slave *slave, char *buf)
55 {
56 return sysfs_emit(buf, "%d\n", READ_ONCE(slave->queue_id));
57 }
58 static SLAVE_ATTR_RO(queue_id);
59
ad_aggregator_id_show(struct slave * slave,char * buf)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 rcu_read_lock();
66 agg = rcu_dereference(SLAVE_AD_INFO(slave)->port.aggregator);
67 if (agg) {
68 ssize_t res = sysfs_emit(buf, "%d\n",
69 agg->aggregator_identifier);
70 rcu_read_unlock();
71 return res;
72 }
73 rcu_read_unlock();
74 }
75
76 return sysfs_emit(buf, "N/A\n");
77 }
78 static SLAVE_ATTR_RO(ad_aggregator_id);
79
ad_actor_oper_port_state_show(struct slave * slave,char * buf)80 static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
81 {
82 const struct port *ad_port;
83
84 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
85 ad_port = &SLAVE_AD_INFO(slave)->port;
86 if (rcu_access_pointer(ad_port->aggregator))
87 return sysfs_emit(buf, "%u\n",
88 ad_port->actor_oper_port_state);
89 }
90
91 return sysfs_emit(buf, "N/A\n");
92 }
93 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
94
ad_partner_oper_port_state_show(struct slave * slave,char * buf)95 static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
96 {
97 const struct port *ad_port;
98
99 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
100 ad_port = &SLAVE_AD_INFO(slave)->port;
101 if (rcu_access_pointer(ad_port->aggregator))
102 return sysfs_emit(buf, "%u\n",
103 ad_port->partner_oper.port_state);
104 }
105
106 return sysfs_emit(buf, "N/A\n");
107 }
108 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
109
110 static const struct attribute *slave_attrs[] = {
111 &slave_attr_state.attr,
112 &slave_attr_mii_status.attr,
113 &slave_attr_link_failure_count.attr,
114 &slave_attr_perm_hwaddr.attr,
115 &slave_attr_queue_id.attr,
116 &slave_attr_ad_aggregator_id.attr,
117 &slave_attr_ad_actor_oper_port_state.attr,
118 &slave_attr_ad_partner_oper_port_state.attr,
119 NULL
120 };
121
122 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
123
slave_show(struct kobject * kobj,struct attribute * attr,char * buf)124 static ssize_t slave_show(struct kobject *kobj,
125 struct attribute *attr, char *buf)
126 {
127 struct slave_attribute *slave_attr = to_slave_attr(attr);
128 struct slave *slave = to_slave(kobj);
129
130 return slave_attr->show(slave, buf);
131 }
132
133 const struct sysfs_ops slave_sysfs_ops = {
134 .show = slave_show,
135 };
136
bond_sysfs_slave_add(struct slave * slave)137 int bond_sysfs_slave_add(struct slave *slave)
138 {
139 return sysfs_create_files(&slave->kobj, slave_attrs);
140 }
141
bond_sysfs_slave_del(struct slave * slave)142 void bond_sysfs_slave_del(struct slave *slave)
143 {
144 sysfs_remove_files(&slave->kobj, slave_attrs);
145 }
146