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| 1 | +/* Sysfs attributes of bond slaves |
| 2 | + * |
| 3 | + * Copyright (c) 2014 Scott Feldman <[email protected]> |
| 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 | + |
| 72 | + if (slave->bond->params.mode == BOND_MODE_8023AD) { |
| 73 | + agg = SLAVE_AD_INFO(slave).port.aggregator; |
| 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 | + |
| 105 | +const struct sysfs_ops slave_sysfs_ops = { |
| 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, |
| 121 | + &(slave->dev->dev.kobj), "slave"); |
| 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 | +} |
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