| | 1 | /* |
| | 2 | * Netlink inteface 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 | * 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. |
| | 18 | * |
| | 19 | * Written by: |
| | 20 | * Sergey Lapin <slapin@ossfans.org> |
| | 21 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| | 22 | * Maxim Osipov <maxim.osipov@siemens.com> |
| | 23 | */ |
| | 24 | |
| | 25 | #include <linux/kernel.h> |
| | 26 | #include <linux/gfp.h> |
| | 27 | #include <net/genetlink.h> |
| | 28 | #include <linux/nl802154.h> |
| | 29 | |
| | 30 | #include "ieee802154.h" |
| | 31 | |
| | 32 | static unsigned int ieee802154_seq_num; |
| | 33 | static DEFINE_SPINLOCK(ieee802154_seq_lock); |
| | 34 | |
| | 35 | struct genl_family nl802154_family = { |
| | 36 | .id = GENL_ID_GENERATE, |
| | 37 | .hdrsize = 0, |
| | 38 | .name = IEEE802154_NL_NAME, |
| | 39 | .version = 1, |
| | 40 | .maxattr = IEEE802154_ATTR_MAX, |
| | 41 | }; |
| | 42 | |
| | 43 | /* Requests to userspace */ |
| | 44 | struct sk_buff *ieee802154_nl_create(int flags, u8 req) |
| | 45 | { |
| | 46 | void *hdr; |
| | 47 | struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); |
| | 48 | unsigned long f; |
| | 49 | |
| | 50 | if (!msg) |
| | 51 | return NULL; |
| | 52 | |
| | 53 | spin_lock_irqsave(&ieee802154_seq_lock, f); |
| | 54 | hdr = genlmsg_put(msg, 0, ieee802154_seq_num++, |
| | 55 | &nl802154_family, flags, req); |
| | 56 | spin_unlock_irqrestore(&ieee802154_seq_lock, f); |
| | 57 | if (!hdr) { |
| | 58 | nlmsg_free(msg); |
| | 59 | return NULL; |
| | 60 | } |
| | 61 | |
| | 62 | return msg; |
| | 63 | } |
| | 64 | |
| | 65 | int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group) |
| | 66 | { |
| | 67 | /* XXX: nlh is right at the start of msg */ |
| | 68 | void *hdr = genlmsg_data(NLMSG_DATA(msg->data)); |
| | 69 | |
| | 70 | if (genlmsg_end(msg, hdr) < 0) |
| | 71 | goto out; |
| | 72 | |
| | 73 | return genlmsg_multicast(msg, 0, group, GFP_ATOMIC); |
| | 74 | out: |
| | 75 | nlmsg_free(msg); |
| | 76 | return -ENOBUFS; |
| | 77 | } |
| | 78 | |
| | 79 | struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info, |
| | 80 | int flags, u8 req) |
| | 81 | { |
| | 82 | void *hdr; |
| | 83 | struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); |
| | 84 | |
| | 85 | if (!msg) |
| | 86 | return NULL; |
| | 87 | |
| | 88 | hdr = genlmsg_put_reply(msg, info, |
| | 89 | &nl802154_family, flags, req); |
| | 90 | if (!hdr) { |
| | 91 | nlmsg_free(msg); |
| | 92 | return NULL; |
| | 93 | } |
| | 94 | |
| | 95 | return msg; |
| | 96 | } |
| | 97 | |
| | 98 | int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info) |
| | 99 | { |
| | 100 | /* XXX: nlh is right at the start of msg */ |
| | 101 | void *hdr = genlmsg_data(NLMSG_DATA(msg->data)); |
| | 102 | |
| | 103 | if (genlmsg_end(msg, hdr) < 0) |
| | 104 | goto out; |
| | 105 | |
| | 106 | return genlmsg_reply(msg, info); |
| | 107 | out: |
| | 108 | nlmsg_free(msg); |
| | 109 | return -ENOBUFS; |
| | 110 | } |
| | 111 | |
| | 112 | int __init ieee802154_nl_init(void) |
| | 113 | { |
| | 114 | int rc; |
| | 115 | |
| | 116 | rc = genl_register_family(&nl802154_family); |
| | 117 | if (rc) |
| | 118 | goto fail; |
| | 119 | |
| | 120 | rc = nl802154_mac_register(); |
| | 121 | if (rc) |
| | 122 | goto fail; |
| | 123 | |
| | 124 | rc = nl802154_phy_register(); |
| | 125 | if (rc) |
| | 126 | goto fail; |
| | 127 | |
| | 128 | return 0; |
| | 129 | |
| | 130 | fail: |
| | 131 | genl_unregister_family(&nl802154_family); |
| | 132 | return rc; |
| | 133 | } |
| | 134 | |
| | 135 | void __exit ieee802154_nl_exit(void) |
| | 136 | { |
| | 137 | genl_unregister_family(&nl802154_family); |
| | 138 | } |
| | 139 | |
projects / linux-2.6-block.git / blame_incremental