| 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, 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, "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, "%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 (BOND_MODE(slave->bond) == 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 ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf) |
| 84 | { |
| 85 | const struct port *ad_port; |
| 86 | |
| 87 | if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) { |
| 88 | ad_port = &SLAVE_AD_INFO(slave)->port; |
| 89 | if (ad_port->aggregator) |
| 90 | return sprintf(buf, "%u\n", |
| 91 | ad_port->actor_oper_port_state); |
| 92 | } |
| 93 | |
| 94 | return sprintf(buf, "N/A\n"); |
| 95 | } |
| 96 | static SLAVE_ATTR_RO(ad_actor_oper_port_state); |
| 97 | |
| 98 | static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf) |
| 99 | { |
| 100 | const struct port *ad_port; |
| 101 | |
| 102 | if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) { |
| 103 | ad_port = &SLAVE_AD_INFO(slave)->port; |
| 104 | if (ad_port->aggregator) |
| 105 | return sprintf(buf, "%u\n", |
| 106 | ad_port->partner_oper.port_state); |
| 107 | } |
| 108 | |
| 109 | return sprintf(buf, "N/A\n"); |
| 110 | } |
| 111 | static SLAVE_ATTR_RO(ad_partner_oper_port_state); |
| 112 | |
| 113 | static const struct slave_attribute *slave_attrs[] = { |
| 114 | &slave_attr_state, |
| 115 | &slave_attr_mii_status, |
| 116 | &slave_attr_link_failure_count, |
| 117 | &slave_attr_perm_hwaddr, |
| 118 | &slave_attr_queue_id, |
| 119 | &slave_attr_ad_aggregator_id, |
| 120 | &slave_attr_ad_actor_oper_port_state, |
| 121 | &slave_attr_ad_partner_oper_port_state, |
| 122 | NULL |
| 123 | }; |
| 124 | |
| 125 | #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr) |
| 126 | #define to_slave(obj) container_of(obj, struct slave, kobj) |
| 127 | |
| 128 | static ssize_t slave_show(struct kobject *kobj, |
| 129 | struct attribute *attr, char *buf) |
| 130 | { |
| 131 | struct slave_attribute *slave_attr = to_slave_attr(attr); |
| 132 | struct slave *slave = to_slave(kobj); |
| 133 | |
| 134 | return slave_attr->show(slave, buf); |
| 135 | } |
| 136 | |
| 137 | static const struct sysfs_ops slave_sysfs_ops = { |
| 138 | .show = slave_show, |
| 139 | }; |
| 140 | |
| 141 | static struct kobj_type slave_ktype = { |
| 142 | #ifdef CONFIG_SYSFS |
| 143 | .sysfs_ops = &slave_sysfs_ops, |
| 144 | #endif |
| 145 | }; |
| 146 | |
| 147 | int bond_sysfs_slave_add(struct slave *slave) |
| 148 | { |
| 149 | const struct slave_attribute **a; |
| 150 | int err; |
| 151 | |
| 152 | err = kobject_init_and_add(&slave->kobj, &slave_ktype, |
| 153 | &(slave->dev->dev.kobj), "bonding_slave"); |
| 154 | if (err) |
| 155 | return err; |
| 156 | |
| 157 | for (a = slave_attrs; *a; ++a) { |
| 158 | err = sysfs_create_file(&slave->kobj, &((*a)->attr)); |
| 159 | if (err) { |
| 160 | kobject_put(&slave->kobj); |
| 161 | return err; |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | void bond_sysfs_slave_del(struct slave *slave) |
| 169 | { |
| 170 | const struct slave_attribute **a; |
| 171 | |
| 172 | for (a = slave_attrs; *a; ++a) |
| 173 | sysfs_remove_file(&slave->kobj, &((*a)->attr)); |
| 174 | |
| 175 | kobject_put(&slave->kobj); |
| 176 | } |