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/*
* w1_netlink.c
*
* Copyright (c) 2003 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include "w1.h"
#include "w1_log.h"
#include "w1_netlink.h"
#ifndef NETLINK_DISABLED
void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)
{
unsigned int size;
struct sk_buff *skb;
struct w1_netlink_msg *data;
struct nlmsghdr *nlh;
if (!dev->nls)
return;
size = NLMSG_SPACE(sizeof(struct w1_netlink_msg));
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
dev_err(&dev->dev, "skb_alloc() failed.\n");
return;
}
nlh = NLMSG_PUT(skb, 0, dev->seq++, NLMSG_DONE, size - sizeof(*nlh));
data = (struct w1_netlink_msg *)NLMSG_DATA(nlh);
memcpy(data, msg, sizeof(struct w1_netlink_msg));
NETLINK_CB(skb).dst_group = dev->groups;
netlink_broadcast(dev->nls, skb, 0, dev->groups, GFP_ATOMIC);
nlmsg_failure:
return;
}
int dev_init_netlink(struct w1_master *dev)
{
dev->nls = netlink_kernel_create(NETLINK_W1, 1, NULL, THIS_MODULE);
if (!dev->nls) {
printk(KERN_ERR "Failed to create new netlink socket(%u) for w1 master %s.\n",
NETLINK_W1, dev->dev.bus_id);
}
return 0;
}
void dev_fini_netlink(struct w1_master *dev)
{
if (dev->nls && dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
}
#else
#warning Netlink support is disabled. Please compile with NET support enabled.
void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)
{
}
int dev_init_netlink(struct w1_master *dev)
{
return 0;
}
void dev_fini_netlink(struct w1_master *dev)
{
}
#endif
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