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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 "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, S_IRUGO, _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, "UNKONWN\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, "%pM\n", slave->perm_hwaddr); |
59 | } |
60 | static SLAVE_ATTR_RO(perm_hwaddr); |
61 | |
62 | static ssize_t queue_id_show(struct slave *slave, char *buf) |
63 | { |
64 | return sprintf(buf, "%d\n", slave->queue_id); |
65 | } |
66 | static SLAVE_ATTR_RO(queue_id); |
67 | |
68 | static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf) |
69 | { |
70 | const struct aggregator *agg; |
71 | |
01844098 |
72 | if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) { |
3fdddd85 |
73 | agg = SLAVE_AD_INFO(slave)->port.aggregator; |
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74 | if (agg) |
75 | return sprintf(buf, "%d\n", |
76 | agg->aggregator_identifier); |
77 | } |
78 | |
79 | return sprintf(buf, "N/A\n"); |
80 | } |
81 | static SLAVE_ATTR_RO(ad_aggregator_id); |
82 | |
83 | static const struct slave_attribute *slave_attrs[] = { |
84 | &slave_attr_state, |
85 | &slave_attr_mii_status, |
86 | &slave_attr_link_failure_count, |
87 | &slave_attr_perm_hwaddr, |
88 | &slave_attr_queue_id, |
89 | &slave_attr_ad_aggregator_id, |
90 | NULL |
91 | }; |
92 | |
93 | #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr) |
94 | #define to_slave(obj) container_of(obj, struct slave, kobj) |
95 | |
96 | static ssize_t slave_show(struct kobject *kobj, |
97 | struct attribute *attr, char *buf) |
98 | { |
99 | struct slave_attribute *slave_attr = to_slave_attr(attr); |
100 | struct slave *slave = to_slave(kobj); |
101 | |
102 | return slave_attr->show(slave, buf); |
103 | } |
104 | |
8d783163 |
105 | static const struct sysfs_ops slave_sysfs_ops = { |
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106 | .show = slave_show, |
107 | }; |
108 | |
109 | static struct kobj_type slave_ktype = { |
110 | #ifdef CONFIG_SYSFS |
111 | .sysfs_ops = &slave_sysfs_ops, |
112 | #endif |
113 | }; |
114 | |
115 | int bond_sysfs_slave_add(struct slave *slave) |
116 | { |
117 | const struct slave_attribute **a; |
118 | int err; |
119 | |
120 | err = kobject_init_and_add(&slave->kobj, &slave_ktype, |
0a9099f8 |
121 | &(slave->dev->dev.kobj), "bonding_slave"); |
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122 | if (err) |
123 | return err; |
124 | |
125 | for (a = slave_attrs; *a; ++a) { |
126 | err = sysfs_create_file(&slave->kobj, &((*a)->attr)); |
127 | if (err) { |
128 | kobject_del(&slave->kobj); |
129 | return err; |
130 | } |
131 | } |
132 | |
133 | return 0; |
134 | } |
135 | |
136 | void bond_sysfs_slave_del(struct slave *slave) |
137 | { |
138 | const struct slave_attribute **a; |
139 | |
140 | for (a = slave_attrs; *a; ++a) |
141 | sysfs_remove_file(&slave->kobj, &((*a)->attr)); |
142 | |
143 | kobject_del(&slave->kobj); |
144 | } |