Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
[firefly-linux-kernel-4.4.55.git] / net / ieee802154 / netlink.c
1 /*
2  * Netlink interface for IEEE 802.15.4 stack
3  *
4  * Copyright 2007, 2008 Siemens AG
5  *
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.
9  *
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.
14  *
15  * Written by:
16  * Sergey Lapin <slapin@ossfans.org>
17  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
18  * Maxim Osipov <maxim.osipov@siemens.com>
19  */
20
21 #include <linux/kernel.h>
22 #include <linux/gfp.h>
23 #include <net/genetlink.h>
24 #include <linux/nl802154.h>
25
26 #include "ieee802154.h"
27
28 static unsigned int ieee802154_seq_num;
29 static DEFINE_SPINLOCK(ieee802154_seq_lock);
30
31 struct genl_family nl802154_family = {
32         .id             = GENL_ID_GENERATE,
33         .hdrsize        = 0,
34         .name           = IEEE802154_NL_NAME,
35         .version        = 1,
36         .maxattr        = IEEE802154_ATTR_MAX,
37 };
38
39 /* Requests to userspace */
40 struct sk_buff *ieee802154_nl_create(int flags, u8 req)
41 {
42         void *hdr;
43         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
44         unsigned long f;
45
46         if (!msg)
47                 return NULL;
48
49         spin_lock_irqsave(&ieee802154_seq_lock, f);
50         hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
51                           &nl802154_family, flags, req);
52         spin_unlock_irqrestore(&ieee802154_seq_lock, f);
53         if (!hdr) {
54                 nlmsg_free(msg);
55                 return NULL;
56         }
57
58         return msg;
59 }
60
61 int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
62 {
63         struct nlmsghdr *nlh = nlmsg_hdr(msg);
64         void *hdr = genlmsg_data(nlmsg_data(nlh));
65
66         genlmsg_end(msg, hdr);
67
68         return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
69 }
70
71 struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
72                                         int flags, u8 req)
73 {
74         void *hdr;
75         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
76
77         if (!msg)
78                 return NULL;
79
80         hdr = genlmsg_put_reply(msg, info,
81                                 &nl802154_family, flags, req);
82         if (!hdr) {
83                 nlmsg_free(msg);
84                 return NULL;
85         }
86
87         return msg;
88 }
89
90 int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
91 {
92         struct nlmsghdr *nlh = nlmsg_hdr(msg);
93         void *hdr = genlmsg_data(nlmsg_data(nlh));
94
95         genlmsg_end(msg, hdr);
96
97         return genlmsg_reply(msg, info);
98 }
99
100 static const struct genl_ops ieee8021154_ops[] = {
101         /* see nl-phy.c */
102         IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
103                         ieee802154_dump_phy),
104         IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
105         IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
106         /* see nl-mac.c */
107         IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
108         IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
109         IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
110         IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
111         IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
112         IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
113                         ieee802154_dump_iface),
114         IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),
115         IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
116         IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
117         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
118                         ieee802154_llsec_dump_keys),
119         IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
120         IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
121         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
122                         ieee802154_llsec_dump_devs),
123         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
124         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
125         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
126                         ieee802154_llsec_dump_devkeys),
127         IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
128         IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
129         IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
130                         ieee802154_llsec_dump_seclevels),
131         IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
132                       ieee802154_llsec_add_seclevel),
133         IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
134                       ieee802154_llsec_del_seclevel),
135 };
136
137 static const struct genl_multicast_group ieee802154_mcgrps[] = {
138         [IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
139         [IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
140 };
141
142 int __init ieee802154_nl_init(void)
143 {
144         return genl_register_family_with_ops_groups(&nl802154_family,
145                                                     ieee8021154_ops,
146                                                     ieee802154_mcgrps);
147 }
148
149 void ieee802154_nl_exit(void)
150 {
151         genl_unregister_family(&nl802154_family);
152 }