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