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1da177e4 LT |
1 | /* |
2 | * w1_netlink.c | |
3 | * | |
4 | * Copyright (c) 2003 Evgeniy Polyakov <johnpol@2ka.mipt.ru> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/skbuff.h> | |
23 | #include <linux/netlink.h> | |
24 | ||
25 | #include "w1.h" | |
26 | #include "w1_log.h" | |
27 | #include "w1_netlink.h" | |
28 | ||
29 | #ifndef NETLINK_DISABLED | |
30 | void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg) | |
31 | { | |
32 | unsigned int size; | |
33 | struct sk_buff *skb; | |
34 | struct w1_netlink_msg *data; | |
35 | struct nlmsghdr *nlh; | |
36 | ||
37 | if (!dev->nls) | |
38 | return; | |
39 | ||
40 | size = NLMSG_SPACE(sizeof(struct w1_netlink_msg)); | |
41 | ||
42 | skb = alloc_skb(size, GFP_ATOMIC); | |
43 | if (!skb) { | |
44 | dev_err(&dev->dev, "skb_alloc() failed.\n"); | |
45 | return; | |
46 | } | |
47 | ||
48 | nlh = NLMSG_PUT(skb, 0, dev->seq++, NLMSG_DONE, size - sizeof(*nlh)); | |
49 | ||
50 | data = (struct w1_netlink_msg *)NLMSG_DATA(nlh); | |
51 | ||
52 | memcpy(data, msg, sizeof(struct w1_netlink_msg)); | |
53 | ||
ac6d439d | 54 | NETLINK_CB(skb).dst_group = dev->groups; |
1da177e4 LT |
55 | netlink_broadcast(dev->nls, skb, 0, dev->groups, GFP_ATOMIC); |
56 | ||
57 | nlmsg_failure: | |
58 | return; | |
59 | } | |
2d833179 EP |
60 | |
61 | int dev_init_netlink(struct w1_master *dev) | |
62 | { | |
63 | dev->nls = netlink_kernel_create(NETLINK_W1, 1, NULL, THIS_MODULE); | |
64 | if (!dev->nls) { | |
65 | printk(KERN_ERR "Failed to create new netlink socket(%u) for w1 master %s.\n", | |
66 | NETLINK_W1, dev->dev.bus_id); | |
67 | } | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | void dev_fini_netlink(struct w1_master *dev) | |
73 | { | |
74 | if (dev->nls && dev->nls->sk_socket) | |
75 | sock_release(dev->nls->sk_socket); | |
76 | } | |
1da177e4 LT |
77 | #else |
78 | #warning Netlink support is disabled. Please compile with NET support enabled. | |
79 | ||
80 | void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg) | |
81 | { | |
82 | } | |
2d833179 EP |
83 | |
84 | int dev_init_netlink(struct w1_master *dev) | |
85 | { | |
86 | return 0; | |
87 | } | |
88 | ||
89 | void dev_fini_netlink(struct w1_master *dev) | |
90 | { | |
91 | } | |
1da177e4 | 92 | #endif |