/*
* This file is part of the Distributed Network Block Device 3
*
* Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
*
* This file may be licensed under the terms of of the
* GNU General Public License Version 2 (the ``GPL'').
*
* Software distributed under the License is distributed
* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See the GPL for the specific language
* governing rights and limitations.
*
* You should have received a copy of the GPL along with this
* program. If not, go to http://www.gnu.org/licenses/gpl.html
* or write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <linux/kobject.h>
#include "sysfs.h"
#include "utils.h"
ssize_t show_cur_server_ip(char *buf, dnbd3_device_t *dev)
{
return sprintf(buf, "%pI4\n", dev->cur_server.hostaddr);
}
ssize_t show_cur_server_rtt(char *buf, dnbd3_device_t *dev)
{
return sprintf(buf, "%llu\n", (unsigned long long)dev->cur_rtt);
}
ssize_t show_alt_server_num(char *buf, dnbd3_device_t *dev)
{
return sprintf(buf, "%d\n", dev->alt_servers_num);
}
ssize_t show_image_name(char *buf, dnbd3_device_t *dev)
{
if (dev->imgname == NULL) return sprintf(buf, "(null)");
return sprintf(buf, "%s\n", dev->imgname);
}
ssize_t show_rid(char *buf, dnbd3_device_t *dev)
{
return sprintf(buf, "%d\n", dev->rid);
}
ssize_t show_update_available(char *buf, dnbd3_device_t *dev)
{
return sprintf(buf, "%d\n", dev->update_available);
}
ssize_t show_alt_server_ip(char *buf, dnbd3_server_t *srv)
{
return sprintf(buf, "%pI4\n", srv->hostaddr);
}
ssize_t show_alt_server_rtt(char *buf, dnbd3_server_t *srv)
{
return sprintf(buf, "%llu\n", (uint64_t)((srv->rtts[0]+srv->rtts[1]+srv->rtts[2]+srv->rtts[3]) / 4));
}
device_attr_t cur_server_ip =
{
.attr = {.name = "cur_server_ip", .mode = 0444 },
.show = show_cur_server_ip,
.store = NULL,
};
device_attr_t cur_server_rtt =
{
.attr = {.name = "cur_server_rtt", .mode = 0444 },
.show = show_cur_server_rtt,
.store = NULL,
};
device_attr_t alt_server_num =
{
.attr = {.name = "alt_server_num", .mode = 0444 },
.show = show_alt_server_num,
.store = NULL,
};
device_attr_t image_name =
{
.attr = {.name = "image_name", .mode = 0444 },
.show = show_image_name,
.store = NULL,
};
device_attr_t rid =
{
.attr = {.name = "rid", .mode = 0444 },
.show = show_rid,
.store = NULL,
};
device_attr_t update_available =
{
.attr = {.name = "update_available", .mode = 0444 },
.show = show_update_available,
.store = NULL,
};
server_attr_t alt_server_ip =
{
.attr = {.name = "alt_server_ip", .mode = 0444 },
.show = show_alt_server_ip,
.store = NULL,
};
server_attr_t alt_server_rtt =
{
.attr = {.name = "alt_server_rtt", .mode = 0444 },
.show = show_alt_server_rtt,
.store = NULL,
};
ssize_t device_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
device_attr_t *device_attr = container_of(attr, device_attr_t, attr);
dnbd3_device_t *dev = container_of(kobj, dnbd3_device_t, kobj);
return device_attr->show(buf, dev);
}
ssize_t server_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
server_attr_t *server_attr = container_of(attr, server_attr_t, attr);
dnbd3_server_t *srv = container_of(kobj, dnbd3_server_t, kobj);
return server_attr->show(buf, srv);
}
struct attribute *device_attrs[] =
{
&cur_server_ip.attr,
&cur_server_rtt.attr,
&alt_server_num.attr,
&image_name.attr,
&rid.attr,
&update_available.attr,
NULL,
};
struct attribute *server_attrs[] =
{
&alt_server_ip.attr,
&alt_server_rtt.attr,
NULL,
};
struct sysfs_ops device_ops =
{
.show = device_show,
};
struct sysfs_ops server_ops =
{
.show = server_show,
};
void release(struct kobject *kobj)
{
kobj->state_initialized = 0;
}
struct kobj_type device_ktype =
{
.default_attrs = device_attrs,
.sysfs_ops = &device_ops,
.release = release,
};
struct kobj_type server_ktype =
{
.default_attrs = server_attrs,
.sysfs_ops = &server_ops,
.release = release,
};
void dnbd3_sysfs_init(dnbd3_device_t *dev)
{
int i;
char name[15] = "alt_server99";
struct kobject *kobj = &dev->kobj;
struct kobj_type *ktype = &device_ktype;
struct kobject *parent = &disk_to_dev(dev->disk)->kobj;
kobject_init_and_add(kobj, ktype, parent, "net");
for (i = 0; i < NUMBER_SERVERS; i++)
{
sprintf(name, "alt_server%d", i);
kobj = &dev->alt_servers[i].kobj;
ktype = &server_ktype;
parent = &dev->kobj;
kobject_init_and_add(kobj, ktype, parent, name);
}
}
void dnbd3_sysfs_exit(dnbd3_device_t *dev)
{
int i;
for (i = 0; i < NUMBER_SERVERS; i++)
{
kobject_put(&dev->alt_servers[i].kobj);
}
kobject_put(&dev->kobj);
}