drivers/net/bonding/bond_sysfs_slave.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*      Sysfs attributes of bond slaves
   3  *
   4  *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
   5  */
   6
   7 #include <linux/capability.h>
   8 #include <linux/kernel.h>
   9 #include <linux/netdevice.h>
  10
  11 #include <net/bonding.h>
  12
  13 struct slave_attribute {
  14         struct attribute attr;
  15         ssize_t (*show)(struct slave *, char *);
  16 };
  17
  18 #define SLAVE_ATTR_RO(_name)                                    \
  19 const struct slave_attribute slave_attr_##_name = __ATTR_RO(_name)
  20
  21 static ssize_t state_show(struct slave *slave, char *buf)
  22 {
  23         switch (bond_slave_state(slave)) {
  24         case BOND_STATE_ACTIVE:
  25                 return sysfs_emit(buf, "active\n");
  26         case BOND_STATE_BACKUP:
  27                 return sysfs_emit(buf, "backup\n");
  28         default:
  29                 return sysfs_emit(buf, "UNKNOWN\n");
  30         }
  31 }
  32 static SLAVE_ATTR_RO(state);
  33
  34 static ssize_t mii_status_show(struct slave *slave, char *buf)
  35 {
  36         return sysfs_emit(buf, "%s\n", bond_slave_link_status(slave->link));
  37 }
  38 static SLAVE_ATTR_RO(mii_status);
  39
  40 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
  41 {
  42         return sysfs_emit(buf, "%d\n", slave->link_failure_count);
  43 }
  44 static SLAVE_ATTR_RO(link_failure_count);
  45
  46 static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
  47 {
  48         return sysfs_emit(buf, "%*phC\n",
  49                        slave->dev->addr_len,
  50                        slave->perm_hwaddr);
  51 }
  52 static SLAVE_ATTR_RO(perm_hwaddr);
  53
  54 static ssize_t queue_id_show(struct slave *slave, char *buf)
  55 {
  56         return sysfs_emit(buf, "%d\n", READ_ONCE(slave->queue_id));
  57 }
  58 static SLAVE_ATTR_RO(queue_id);
  59
  60 static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
  61 {
  62         const struct aggregator *agg;
  63
  64         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  65                 agg = SLAVE_AD_INFO(slave)->port.aggregator;
  66                 if (agg)
  67                         return sysfs_emit(buf, "%d\n",
  68                                           agg->aggregator_identifier);
  69         }
  70
  71         return sysfs_emit(buf, "N/A\n");
  72 }
  73 static SLAVE_ATTR_RO(ad_aggregator_id);
  74
  75 static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
  76 {
  77         const struct port *ad_port;
  78
  79         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  80                 ad_port = &SLAVE_AD_INFO(slave)->port;
  81                 if (ad_port->aggregator)
  82                         return sysfs_emit(buf, "%u\n",
  83                                        ad_port->actor_oper_port_state);
  84         }
  85
  86         return sysfs_emit(buf, "N/A\n");
  87 }
  88 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
  89
  90 static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
  91 {
  92         const struct port *ad_port;
  93
  94         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  95                 ad_port = &SLAVE_AD_INFO(slave)->port;
  96                 if (ad_port->aggregator)
  97                         return sysfs_emit(buf, "%u\n",
  98                                        ad_port->partner_oper.port_state);
  99         }
 100
 101         return sysfs_emit(buf, "N/A\n");
 102 }
 103 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
 104
 105 static const struct attribute *slave_attrs[] = {
 106         &slave_attr_state.attr,
 107         &slave_attr_mii_status.attr,
 108         &slave_attr_link_failure_count.attr,
 109         &slave_attr_perm_hwaddr.attr,
 110         &slave_attr_queue_id.attr,
 111         &slave_attr_ad_aggregator_id.attr,
 112         &slave_attr_ad_actor_oper_port_state.attr,
 113         &slave_attr_ad_partner_oper_port_state.attr,
 114         NULL
 115 };
 116
 117 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
 118
 119 static ssize_t slave_show(struct kobject *kobj,
 120                           struct attribute *attr, char *buf)
 121 {
 122         struct slave_attribute *slave_attr = to_slave_attr(attr);
 123         struct slave *slave = to_slave(kobj);
 124
 125         return slave_attr->show(slave, buf);
 126 }
 127
 128 const struct sysfs_ops slave_sysfs_ops = {
 129         .show = slave_show,
 130 };
 131
 132 int bond_sysfs_slave_add(struct slave *slave)
 133 {
 134         return sysfs_create_files(&slave->kobj, slave_attrs);
 135 }
 136
 137 void bond_sysfs_slave_del(struct slave *slave)
 138 {
 139         sysfs_remove_files(&slave->kobj, slave_attrs);
 140 }