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 slave_attribute *slave_attrs[] = {
 116         &slave_attr_state,
 117         &slave_attr_mii_status,
 118         &slave_attr_link_failure_count,
 119         &slave_attr_perm_hwaddr,
 120         &slave_attr_queue_id,
 121         &slave_attr_ad_aggregator_id,
 122         &slave_attr_ad_actor_oper_port_state,
 123         &slave_attr_ad_partner_oper_port_state,
 124         NULL
 125 };
 126
 127 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
 128 #define to_slave(obj)   container_of(obj, struct slave, kobj)
 129
 130 static ssize_t slave_show(struct kobject *kobj,
 131                           struct attribute *attr, char *buf)
 132 {
 133         struct slave_attribute *slave_attr = to_slave_attr(attr);
 134         struct slave *slave = to_slave(kobj);
 135
 136         return slave_attr->show(slave, buf);
 137 }
 138
 139 static const struct sysfs_ops slave_sysfs_ops = {
 140         .show = slave_show,
 141 };
 142
 143 static struct kobj_type slave_ktype = {
 144 #ifdef CONFIG_SYSFS
 145         .sysfs_ops = &slave_sysfs_ops,
 146 #endif
 147 };
 148
 149 int bond_sysfs_slave_add(struct slave *slave)
 150 {
 151         const struct slave_attribute **a;
 152         int err;
 153
 154         err = kobject_init_and_add(&slave->kobj, &slave_ktype,
 155                                    &(slave->dev->dev.kobj), "bonding_slave");
 156         if (err)
 157                 return err;
 158
 159         for (a = slave_attrs; *a; ++a) {
 160                 err = sysfs_create_file(&slave->kobj, &((*a)->attr));
 161                 if (err) {
 162                         kobject_put(&slave->kobj);
 163                         return err;
 164                 }
 165         }
 166
 167         return 0;
 168 }
 169
 170 void bond_sysfs_slave_del(struct slave *slave)
 171 {
 172         const struct slave_attribute **a;
 173
 174         for (a = slave_attrs; *a; ++a)
 175                 sysfs_remove_file(&slave->kobj, &((*a)->attr));
 176
 177         kobject_put(&slave->kobj);
 178 }