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 } 177