Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / bonding / bond_sysfs_slave.c

diff --git a/kernel/drivers/net/bonding/bond_sysfs_slave.c b/kernel/drivers/net/bonding/bond_sysfs_slave.c
new file mode 100644 (file)
index 0000000..23618a8
--- /dev/null
+++ b/kernel/drivers/net/bonding/bond_sysfs_slave.c
@@ -0,0 +1,144 @@
+/*     Sysfs attributes of bond slaves
+ *
+ *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License
+ *     as published by the Free Software Foundation; either version
+ *     2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+
+struct slave_attribute {
+       struct attribute attr;
+       ssize_t (*show)(struct slave *, char *);
+};
+
+#define SLAVE_ATTR(_name, _mode, _show)                                \
+const struct slave_attribute slave_attr_##_name = {            \
+       .attr = {.name = __stringify(_name),                    \
+                .mode = _mode },                               \
+       .show   = _show,                                        \
+};
+#define SLAVE_ATTR_RO(_name) \
+       SLAVE_ATTR(_name, S_IRUGO, _name##_show)
+
+static ssize_t state_show(struct slave *slave, char *buf)
+{
+       switch (bond_slave_state(slave)) {
+       case BOND_STATE_ACTIVE:
+               return sprintf(buf, "active\n");
+       case BOND_STATE_BACKUP:
+               return sprintf(buf, "backup\n");
+       default:
+               return sprintf(buf, "UNKNOWN\n");
+       }
+}
+static SLAVE_ATTR_RO(state);
+
+static ssize_t mii_status_show(struct slave *slave, char *buf)
+{
+       return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
+}
+static SLAVE_ATTR_RO(mii_status);
+
+static ssize_t link_failure_count_show(struct slave *slave, char *buf)
+{
+       return sprintf(buf, "%d\n", slave->link_failure_count);
+}
+static SLAVE_ATTR_RO(link_failure_count);
+
+static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
+{
+       return sprintf(buf, "%pM\n", slave->perm_hwaddr);
+}
+static SLAVE_ATTR_RO(perm_hwaddr);
+
+static ssize_t queue_id_show(struct slave *slave, char *buf)
+{
+       return sprintf(buf, "%d\n", slave->queue_id);
+}
+static SLAVE_ATTR_RO(queue_id);
+
+static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
+{
+       const struct aggregator *agg;
+
+       if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
+               agg = SLAVE_AD_INFO(slave)->port.aggregator;
+               if (agg)
+                       return sprintf(buf, "%d\n",
+                                      agg->aggregator_identifier);
+       }
+
+       return sprintf(buf, "N/A\n");
+}
+static SLAVE_ATTR_RO(ad_aggregator_id);
+
+static const struct slave_attribute *slave_attrs[] = {
+       &slave_attr_state,
+       &slave_attr_mii_status,
+       &slave_attr_link_failure_count,
+       &slave_attr_perm_hwaddr,
+       &slave_attr_queue_id,
+       &slave_attr_ad_aggregator_id,
+       NULL
+};
+
+#define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
+#define to_slave(obj)  container_of(obj, struct slave, kobj)
+
+static ssize_t slave_show(struct kobject *kobj,
+                         struct attribute *attr, char *buf)
+{
+       struct slave_attribute *slave_attr = to_slave_attr(attr);
+       struct slave *slave = to_slave(kobj);
+
+       return slave_attr->show(slave, buf);
+}
+
+static const struct sysfs_ops slave_sysfs_ops = {
+       .show = slave_show,
+};
+
+static struct kobj_type slave_ktype = {
+#ifdef CONFIG_SYSFS
+       .sysfs_ops = &slave_sysfs_ops,
+#endif
+};
+
+int bond_sysfs_slave_add(struct slave *slave)
+{
+       const struct slave_attribute **a;
+       int err;
+
+       err = kobject_init_and_add(&slave->kobj, &slave_ktype,
+                                  &(slave->dev->dev.kobj), "bonding_slave");
+       if (err)
+               return err;
+
+       for (a = slave_attrs; *a; ++a) {
+               err = sysfs_create_file(&slave->kobj, &((*a)->attr));
+               if (err) {
+                       kobject_put(&slave->kobj);
+                       return err;
+               }
+       }
+
+       return 0;
+}
+
+void bond_sysfs_slave_del(struct slave *slave)
+{
+       const struct slave_attribute **a;
+
+       for (a = slave_attrs; *a; ++a)
+               sysfs_remove_file(&slave->kobj, &((*a)->attr));
+
+       kobject_put(&slave->kobj);
+}