Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
[linux-2.6/linux-2.6-openrd.git] / net / ieee802154 / netlink.c
blob33137b99e47137b8b589c8efbcf6d6912e4573f1
1 /*
2 * Netlink inteface for IEEE 802.15.4 stack
4 * Copyright 2007, 2008 Siemens AG
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 * Written by:
20 * Sergey Lapin <slapin@ossfans.org>
21 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
22 * Maxim Osipov <maxim.osipov@siemens.com>
25 #include <linux/kernel.h>
26 #include <net/genetlink.h>
27 #include <linux/nl802154.h>
29 #include "ieee802154.h"
31 static unsigned int ieee802154_seq_num;
32 static DEFINE_SPINLOCK(ieee802154_seq_lock);
34 struct genl_family nl802154_family = {
35 .id = GENL_ID_GENERATE,
36 .hdrsize = 0,
37 .name = IEEE802154_NL_NAME,
38 .version = 1,
39 .maxattr = IEEE802154_ATTR_MAX,
42 /* Requests to userspace */
43 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
45 void *hdr;
46 struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
47 unsigned long f;
49 if (!msg)
50 return NULL;
52 spin_lock_irqsave(&ieee802154_seq_lock, f);
53 hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
54 &nl802154_family, flags, req);
55 spin_unlock_irqrestore(&ieee802154_seq_lock, f);
56 if (!hdr) {
57 nlmsg_free(msg);
58 return NULL;
61 return msg;
64 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
66 /* XXX: nlh is right at the start of msg */
67 void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
69 if (genlmsg_end(msg, hdr) < 0)
70 goto out;
72 return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
73 out:
74 nlmsg_free(msg);
75 return -ENOBUFS;
78 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
79 int flags, u8 req)
81 void *hdr;
82 struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
84 if (!msg)
85 return NULL;
87 hdr = genlmsg_put_reply(msg, info,
88 &nl802154_family, flags, req);
89 if (!hdr) {
90 nlmsg_free(msg);
91 return NULL;
94 return msg;
97 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
99 /* XXX: nlh is right at the start of msg */
100 void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
102 if (genlmsg_end(msg, hdr) < 0)
103 goto out;
105 return genlmsg_reply(msg, info);
106 out:
107 nlmsg_free(msg);
108 return -ENOBUFS;
111 int __init ieee802154_nl_init(void)
113 int rc;
115 rc = genl_register_family(&nl802154_family);
116 if (rc)
117 goto fail;
119 rc = nl802154_mac_register();
120 if (rc)
121 goto fail;
123 rc = nl802154_phy_register();
124 if (rc)
125 goto fail;
127 return 0;
129 fail:
130 genl_unregister_family(&nl802154_family);
131 return rc;
134 void __exit ieee802154_nl_exit(void)
136 genl_unregister_family(&nl802154_family);