GNU Linux-libre 4.19.314-gnu1
[releases.git] / drivers / net / bonding / bond_sysfs_slave.c
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 attribute *slave_attrs[] = {
116         &slave_attr_state.attr,
117         &slave_attr_mii_status.attr,
118         &slave_attr_link_failure_count.attr,
119         &slave_attr_perm_hwaddr.attr,
120         &slave_attr_queue_id.attr,
121         &slave_attr_ad_aggregator_id.attr,
122         &slave_attr_ad_actor_oper_port_state.attr,
123         &slave_attr_ad_partner_oper_port_state.attr,
124         NULL
125 };
126
127 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
128
129 static ssize_t slave_show(struct kobject *kobj,
130                           struct attribute *attr, char *buf)
131 {
132         struct slave_attribute *slave_attr = to_slave_attr(attr);
133         struct slave *slave = to_slave(kobj);
134
135         return slave_attr->show(slave, buf);
136 }
137
138 const struct sysfs_ops slave_sysfs_ops = {
139         .show = slave_show,
140 };
141
142 int bond_sysfs_slave_add(struct slave *slave)
143 {
144         return sysfs_create_files(&slave->kobj, slave_attrs);
145 }
146
147 void bond_sysfs_slave_del(struct slave *slave)
148 {
149         sysfs_remove_files(&slave->kobj, slave_attrs);
150 }