2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
8 * Vendor commands implementation based on net/wireless/nl80211.c
11 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
12 * Copyright 2013-2014 Intel Mobile Communications GmbH
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
30 #include <net/genetlink.h>
31 #include <linux/nfc.h>
32 #include <linux/slab.h>
37 static const struct genl_multicast_group nfc_genl_mcgrps[] = {
38 { .name = NFC_GENL_MCAST_EVENT_NAME, },
41 static struct genl_family nfc_genl_family;
42 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
43 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
44 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
45 .len = NFC_DEVICE_NAME_MAXSIZE },
46 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
47 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
48 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
49 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
50 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
51 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
52 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
53 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
54 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
55 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
56 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
57 .len = NFC_FIRMWARE_NAME_MAXSIZE },
58 [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
59 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
60 [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 },
61 [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
62 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
66 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
67 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
69 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
72 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
73 struct netlink_callback *cb, int flags)
77 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
78 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
82 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
84 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
85 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
86 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
87 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
89 if (target->nfcid1_len > 0 &&
90 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
93 if (target->sensb_res_len > 0 &&
94 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
97 if (target->sensf_res_len > 0 &&
98 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
100 goto nla_put_failure;
102 if (target->is_iso15693) {
103 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
104 target->iso15693_dsfid) ||
105 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
106 sizeof(target->iso15693_uid), target->iso15693_uid))
107 goto nla_put_failure;
110 genlmsg_end(msg, hdr);
114 genlmsg_cancel(msg, hdr);
118 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
120 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
125 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
126 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy,
131 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
132 return ERR_PTR(-EINVAL);
134 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
136 dev = nfc_get_device(idx);
138 return ERR_PTR(-ENODEV);
143 static int nfc_genl_dump_targets(struct sk_buff *skb,
144 struct netlink_callback *cb)
147 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
151 dev = __get_device_from_cb(cb);
155 cb->args[1] = (long) dev;
158 device_lock(&dev->dev);
160 cb->seq = dev->targets_generation;
162 while (i < dev->n_targets) {
163 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
171 device_unlock(&dev->dev);
178 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
180 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
188 int nfc_genl_targets_found(struct nfc_dev *dev)
193 dev->genl_data.poll_req_portid = 0;
195 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
199 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
200 NFC_EVENT_TARGETS_FOUND);
204 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
205 goto nla_put_failure;
207 genlmsg_end(msg, hdr);
209 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
212 genlmsg_cancel(msg, hdr);
218 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
223 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
227 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
228 NFC_EVENT_TARGET_LOST);
232 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
233 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
234 goto nla_put_failure;
236 genlmsg_end(msg, hdr);
238 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
243 genlmsg_cancel(msg, hdr);
249 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
254 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
258 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
259 NFC_EVENT_TM_ACTIVATED);
263 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
264 goto nla_put_failure;
265 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
266 goto nla_put_failure;
268 genlmsg_end(msg, hdr);
270 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
275 genlmsg_cancel(msg, hdr);
281 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
286 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
290 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
291 NFC_EVENT_TM_DEACTIVATED);
295 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
296 goto nla_put_failure;
298 genlmsg_end(msg, hdr);
300 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
305 genlmsg_cancel(msg, hdr);
311 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
313 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
314 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
315 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
316 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
317 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
322 int nfc_genl_device_added(struct nfc_dev *dev)
327 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
331 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
332 NFC_EVENT_DEVICE_ADDED);
336 if (nfc_genl_setup_device_added(dev, msg))
337 goto nla_put_failure;
339 genlmsg_end(msg, hdr);
341 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
346 genlmsg_cancel(msg, hdr);
352 int nfc_genl_device_removed(struct nfc_dev *dev)
357 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
361 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
362 NFC_EVENT_DEVICE_REMOVED);
366 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
367 goto nla_put_failure;
369 genlmsg_end(msg, hdr);
371 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
376 genlmsg_cancel(msg, hdr);
382 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
385 struct nlattr *sdp_attr, *uri_attr;
386 struct nfc_llcp_sdp_tlv *sdres;
387 struct hlist_node *n;
392 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
396 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
397 NFC_EVENT_LLC_SDRES);
401 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
402 goto nla_put_failure;
404 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
405 if (sdp_attr == NULL) {
407 goto nla_put_failure;
411 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
412 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
414 uri_attr = nla_nest_start(msg, i++);
415 if (uri_attr == NULL) {
417 goto nla_put_failure;
420 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
421 goto nla_put_failure;
423 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
424 goto nla_put_failure;
426 nla_nest_end(msg, uri_attr);
428 hlist_del(&sdres->node);
430 nfc_llcp_free_sdp_tlv(sdres);
433 nla_nest_end(msg, sdp_attr);
435 genlmsg_end(msg, hdr);
437 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
440 genlmsg_cancel(msg, hdr);
445 nfc_llcp_free_sdp_tlv_list(sdres_list);
450 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
455 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
459 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
464 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
465 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
466 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
467 goto nla_put_failure;
469 genlmsg_end(msg, hdr);
471 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
476 genlmsg_cancel(msg, hdr);
482 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
487 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
491 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
492 NFC_EVENT_SE_REMOVED);
496 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
497 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
498 goto nla_put_failure;
500 genlmsg_end(msg, hdr);
502 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
507 genlmsg_cancel(msg, hdr);
513 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
514 struct nfc_evt_transaction *evt_transaction)
520 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
524 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
525 NFC_EVENT_SE_TRANSACTION);
529 se = nfc_find_se(dev, se_idx);
533 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
534 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
535 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
536 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
537 evt_transaction->aid) ||
538 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
539 evt_transaction->params))
540 goto nla_put_failure;
542 /* evt_transaction is no more used */
543 devm_kfree(&dev->dev, evt_transaction);
545 genlmsg_end(msg, hdr);
547 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
552 genlmsg_cancel(msg, hdr);
554 /* evt_transaction is no more used */
555 devm_kfree(&dev->dev, evt_transaction);
560 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
566 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
570 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
571 NFC_EVENT_SE_CONNECTIVITY);
575 se = nfc_find_se(dev, se_idx);
579 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
580 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
581 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
582 goto nla_put_failure;
584 genlmsg_end(msg, hdr);
586 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
591 genlmsg_cancel(msg, hdr);
597 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
599 struct netlink_callback *cb,
604 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
610 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
612 if (nfc_genl_setup_device_added(dev, msg))
613 goto nla_put_failure;
615 genlmsg_end(msg, hdr);
619 genlmsg_cancel(msg, hdr);
623 static int nfc_genl_dump_devices(struct sk_buff *skb,
624 struct netlink_callback *cb)
626 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
627 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
628 bool first_call = false;
632 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
635 cb->args[0] = (long) iter;
638 mutex_lock(&nfc_devlist_mutex);
640 cb->seq = nfc_devlist_generation;
643 nfc_device_iter_init(iter);
644 dev = nfc_device_iter_next(iter);
650 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
651 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
655 dev = nfc_device_iter_next(iter);
658 mutex_unlock(&nfc_devlist_mutex);
660 cb->args[1] = (long) dev;
665 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
667 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
670 nfc_device_iter_exit(iter);
677 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
678 u8 comm_mode, u8 rf_mode)
683 pr_debug("DEP link is up\n");
685 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
689 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
693 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
694 goto nla_put_failure;
695 if (rf_mode == NFC_RF_INITIATOR &&
696 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
697 goto nla_put_failure;
698 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
699 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
700 goto nla_put_failure;
702 genlmsg_end(msg, hdr);
704 dev->dep_link_up = true;
706 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
711 genlmsg_cancel(msg, hdr);
717 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
722 pr_debug("DEP link is down\n");
724 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
728 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
729 NFC_CMD_DEP_LINK_DOWN);
733 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
734 goto nla_put_failure;
736 genlmsg_end(msg, hdr);
738 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
743 genlmsg_cancel(msg, hdr);
749 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
756 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
759 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
761 dev = nfc_get_device(idx);
765 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
771 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
778 return genlmsg_reply(msg, info);
787 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
793 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
796 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
798 dev = nfc_get_device(idx);
802 rc = nfc_dev_up(dev);
808 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
814 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
817 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
819 dev = nfc_get_device(idx);
823 rc = nfc_dev_down(dev);
829 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
834 u32 im_protocols = 0, tm_protocols = 0;
836 pr_debug("Poll start\n");
838 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
839 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
840 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
841 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
844 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
846 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
847 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
849 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
850 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
851 else if (info->attrs[NFC_ATTR_PROTOCOLS])
852 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
854 dev = nfc_get_device(idx);
858 mutex_lock(&dev->genl_data.genl_data_mutex);
860 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
862 dev->genl_data.poll_req_portid = info->snd_portid;
864 mutex_unlock(&dev->genl_data.genl_data_mutex);
870 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
876 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
879 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
881 dev = nfc_get_device(idx);
885 device_lock(&dev->dev);
888 device_unlock(&dev->dev);
893 device_unlock(&dev->dev);
895 mutex_lock(&dev->genl_data.genl_data_mutex);
897 if (dev->genl_data.poll_req_portid != info->snd_portid) {
902 rc = nfc_stop_poll(dev);
903 dev->genl_data.poll_req_portid = 0;
906 mutex_unlock(&dev->genl_data.genl_data_mutex);
911 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
914 u32 device_idx, target_idx, protocol;
917 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
918 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
919 !info->attrs[NFC_ATTR_PROTOCOLS])
922 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
924 dev = nfc_get_device(device_idx);
928 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
929 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
931 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
932 rc = nfc_activate_target(dev, target_idx, protocol);
938 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
945 pr_debug("DEP link up\n");
947 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
948 !info->attrs[NFC_ATTR_COMM_MODE])
951 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
952 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
953 tgt_idx = NFC_TARGET_IDX_ANY;
955 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
957 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
959 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
962 dev = nfc_get_device(idx);
966 rc = nfc_dep_link_up(dev, tgt_idx, comm);
973 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
979 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
980 !info->attrs[NFC_ATTR_TARGET_INDEX])
983 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
985 dev = nfc_get_device(idx);
989 rc = nfc_dep_link_down(dev);
995 static int nfc_genl_send_params(struct sk_buff *msg,
996 struct nfc_llcp_local *local,
1001 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
1002 NFC_CMD_LLC_GET_PARAMS);
1006 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1007 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1008 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1009 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1010 goto nla_put_failure;
1012 genlmsg_end(msg, hdr);
1017 genlmsg_cancel(msg, hdr);
1021 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1023 struct nfc_dev *dev;
1024 struct nfc_llcp_local *local;
1026 struct sk_buff *msg = NULL;
1029 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1030 !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1033 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1035 dev = nfc_get_device(idx);
1039 device_lock(&dev->dev);
1041 local = nfc_llcp_find_local(dev);
1047 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1053 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1056 device_unlock(&dev->dev);
1058 nfc_put_device(dev);
1067 return genlmsg_reply(msg, info);
1070 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1072 struct nfc_dev *dev;
1073 struct nfc_llcp_local *local;
1079 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1080 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1081 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1082 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1085 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1086 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1088 if (rw > LLCP_MAX_RW)
1092 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1093 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1095 if (miux > LLCP_MAX_MIUX)
1099 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1101 dev = nfc_get_device(idx);
1105 device_lock(&dev->dev);
1107 local = nfc_llcp_find_local(dev);
1113 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1114 if (dev->dep_link_up) {
1119 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1122 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1125 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1126 local->miux = cpu_to_be16(miux);
1129 device_unlock(&dev->dev);
1131 nfc_put_device(dev);
1136 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1138 struct nfc_dev *dev;
1139 struct nfc_llcp_local *local;
1140 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1145 size_t uri_len, tlvs_len;
1146 struct hlist_head sdreq_list;
1147 struct nfc_llcp_sdp_tlv *sdreq;
1149 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1150 !info->attrs[NFC_ATTR_LLC_SDP])
1153 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1155 dev = nfc_get_device(idx);
1159 device_lock(&dev->dev);
1161 if (dev->dep_link_up == false) {
1166 local = nfc_llcp_find_local(dev);
1172 INIT_HLIST_HEAD(&sdreq_list);
1176 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1177 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1178 nfc_sdp_genl_policy, info->extack);
1185 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1188 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1192 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1193 if (uri == NULL || *uri == 0)
1196 tid = local->sdreq_next_tid++;
1198 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1199 if (sdreq == NULL) {
1204 tlvs_len += sdreq->tlv_len;
1206 hlist_add_head(&sdreq->node, &sdreq_list);
1209 if (hlist_empty(&sdreq_list)) {
1214 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1216 device_unlock(&dev->dev);
1218 nfc_put_device(dev);
1223 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1225 struct nfc_dev *dev;
1228 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1230 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1233 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1235 dev = nfc_get_device(idx);
1239 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1240 sizeof(firmware_name));
1242 rc = nfc_fw_download(dev, firmware_name);
1244 nfc_put_device(dev);
1248 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1251 struct sk_buff *msg;
1254 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1258 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1259 NFC_CMD_FW_DOWNLOAD);
1263 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1264 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1265 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1266 goto nla_put_failure;
1268 genlmsg_end(msg, hdr);
1270 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1275 genlmsg_cancel(msg, hdr);
1281 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1283 struct nfc_dev *dev;
1287 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1288 !info->attrs[NFC_ATTR_SE_INDEX])
1291 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1292 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1294 dev = nfc_get_device(idx);
1298 rc = nfc_enable_se(dev, se_idx);
1300 nfc_put_device(dev);
1304 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1306 struct nfc_dev *dev;
1310 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1311 !info->attrs[NFC_ATTR_SE_INDEX])
1314 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1315 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1317 dev = nfc_get_device(idx);
1321 rc = nfc_disable_se(dev, se_idx);
1323 nfc_put_device(dev);
1327 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1328 u32 portid, u32 seq,
1329 struct netlink_callback *cb,
1333 struct nfc_se *se, *n;
1335 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1336 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1339 goto nla_put_failure;
1342 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1344 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1345 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1346 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1347 goto nla_put_failure;
1349 genlmsg_end(msg, hdr);
1355 genlmsg_cancel(msg, hdr);
1359 static int nfc_genl_dump_ses(struct sk_buff *skb,
1360 struct netlink_callback *cb)
1362 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1363 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1364 bool first_call = false;
1368 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1371 cb->args[0] = (long) iter;
1374 mutex_lock(&nfc_devlist_mutex);
1376 cb->seq = nfc_devlist_generation;
1379 nfc_device_iter_init(iter);
1380 dev = nfc_device_iter_next(iter);
1386 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1387 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1391 dev = nfc_device_iter_next(iter);
1394 mutex_unlock(&nfc_devlist_mutex);
1396 cb->args[1] = (long) dev;
1401 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1403 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1406 nfc_device_iter_exit(iter);
1413 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1414 u8 *apdu, size_t apdu_length,
1415 se_io_cb_t cb, void *cb_context)
1420 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1422 device_lock(&dev->dev);
1424 if (!device_is_registered(&dev->dev)) {
1434 if (!dev->ops->se_io) {
1439 se = nfc_find_se(dev, se_idx);
1445 if (se->state != NFC_SE_ENABLED) {
1450 rc = dev->ops->se_io(dev, se_idx, apdu,
1451 apdu_length, cb, cb_context);
1453 device_unlock(&dev->dev);
1457 device_unlock(&dev->dev);
1467 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1469 struct se_io_ctx *ctx = context;
1470 struct sk_buff *msg;
1473 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1479 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1484 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1485 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1486 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1487 goto nla_put_failure;
1489 genlmsg_end(msg, hdr);
1491 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1498 genlmsg_cancel(msg, hdr);
1506 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1508 struct nfc_dev *dev;
1509 struct se_io_ctx *ctx;
1510 u32 dev_idx, se_idx;
1515 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1516 !info->attrs[NFC_ATTR_SE_INDEX] ||
1517 !info->attrs[NFC_ATTR_SE_APDU])
1520 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1521 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1523 dev = nfc_get_device(dev_idx);
1527 if (!dev->ops || !dev->ops->se_io) {
1532 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1533 if (apdu_len == 0) {
1538 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1544 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1550 ctx->dev_idx = dev_idx;
1551 ctx->se_idx = se_idx;
1553 rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1556 nfc_put_device(dev);
1560 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1561 struct genl_info *info)
1563 struct nfc_dev *dev;
1564 struct nfc_vendor_cmd *cmd;
1565 u32 dev_idx, vid, subcmd;
1570 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1571 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1572 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1575 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1576 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1577 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1579 dev = nfc_get_device(dev_idx);
1583 if (!dev->vendor_cmds || !dev->n_vendor_cmds) {
1588 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1589 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1590 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1591 if (data_len == 0) {
1600 for (i = 0; i < dev->n_vendor_cmds; i++) {
1601 cmd = &dev->vendor_cmds[i];
1603 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1606 dev->cur_cmd_info = info;
1607 err = cmd->doit(dev, data, data_len);
1608 dev->cur_cmd_info = NULL;
1615 nfc_put_device(dev);
1619 /* message building helper */
1620 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1623 /* since there is no private header just add the generic one */
1624 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1627 static struct sk_buff *
1628 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1629 u32 portid, u32 seq,
1630 enum nfc_attrs attr,
1631 u32 oui, u32 subcmd, gfp_t gfp)
1633 struct sk_buff *skb;
1636 skb = nlmsg_new(approxlen + 100, gfp);
1640 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1646 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1647 goto nla_put_failure;
1648 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1649 goto nla_put_failure;
1650 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1651 goto nla_put_failure;
1653 ((void **)skb->cb)[0] = dev;
1654 ((void **)skb->cb)[1] = hdr;
1663 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1664 enum nfc_attrs attr,
1665 u32 oui, u32 subcmd,
1668 if (WARN_ON(!dev->cur_cmd_info))
1671 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1672 dev->cur_cmd_info->snd_portid,
1673 dev->cur_cmd_info->snd_seq, attr,
1674 oui, subcmd, GFP_KERNEL);
1676 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1678 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1680 struct nfc_dev *dev = ((void **)skb->cb)[0];
1681 void *hdr = ((void **)skb->cb)[1];
1683 /* clear CB data for netlink core to own from now on */
1684 memset(skb->cb, 0, sizeof(skb->cb));
1686 if (WARN_ON(!dev->cur_cmd_info)) {
1691 genlmsg_end(skb, hdr);
1692 return genlmsg_reply(skb, dev->cur_cmd_info);
1694 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1696 static const struct genl_ops nfc_genl_ops[] = {
1698 .cmd = NFC_CMD_GET_DEVICE,
1699 .doit = nfc_genl_get_device,
1700 .dumpit = nfc_genl_dump_devices,
1701 .done = nfc_genl_dump_devices_done,
1702 .policy = nfc_genl_policy,
1705 .cmd = NFC_CMD_DEV_UP,
1706 .doit = nfc_genl_dev_up,
1707 .policy = nfc_genl_policy,
1710 .cmd = NFC_CMD_DEV_DOWN,
1711 .doit = nfc_genl_dev_down,
1712 .policy = nfc_genl_policy,
1715 .cmd = NFC_CMD_START_POLL,
1716 .doit = nfc_genl_start_poll,
1717 .policy = nfc_genl_policy,
1720 .cmd = NFC_CMD_STOP_POLL,
1721 .doit = nfc_genl_stop_poll,
1722 .policy = nfc_genl_policy,
1725 .cmd = NFC_CMD_DEP_LINK_UP,
1726 .doit = nfc_genl_dep_link_up,
1727 .policy = nfc_genl_policy,
1730 .cmd = NFC_CMD_DEP_LINK_DOWN,
1731 .doit = nfc_genl_dep_link_down,
1732 .policy = nfc_genl_policy,
1735 .cmd = NFC_CMD_GET_TARGET,
1736 .dumpit = nfc_genl_dump_targets,
1737 .done = nfc_genl_dump_targets_done,
1738 .policy = nfc_genl_policy,
1741 .cmd = NFC_CMD_LLC_GET_PARAMS,
1742 .doit = nfc_genl_llc_get_params,
1743 .policy = nfc_genl_policy,
1746 .cmd = NFC_CMD_LLC_SET_PARAMS,
1747 .doit = nfc_genl_llc_set_params,
1748 .policy = nfc_genl_policy,
1751 .cmd = NFC_CMD_LLC_SDREQ,
1752 .doit = nfc_genl_llc_sdreq,
1753 .policy = nfc_genl_policy,
1756 .cmd = NFC_CMD_FW_DOWNLOAD,
1757 .doit = nfc_genl_fw_download,
1758 .policy = nfc_genl_policy,
1761 .cmd = NFC_CMD_ENABLE_SE,
1762 .doit = nfc_genl_enable_se,
1763 .policy = nfc_genl_policy,
1766 .cmd = NFC_CMD_DISABLE_SE,
1767 .doit = nfc_genl_disable_se,
1768 .policy = nfc_genl_policy,
1771 .cmd = NFC_CMD_GET_SE,
1772 .dumpit = nfc_genl_dump_ses,
1773 .done = nfc_genl_dump_ses_done,
1774 .policy = nfc_genl_policy,
1777 .cmd = NFC_CMD_SE_IO,
1778 .doit = nfc_genl_se_io,
1779 .policy = nfc_genl_policy,
1782 .cmd = NFC_CMD_ACTIVATE_TARGET,
1783 .doit = nfc_genl_activate_target,
1784 .policy = nfc_genl_policy,
1787 .cmd = NFC_CMD_VENDOR,
1788 .doit = nfc_genl_vendor_cmd,
1789 .policy = nfc_genl_policy,
1793 static struct genl_family nfc_genl_family __ro_after_init = {
1795 .name = NFC_GENL_NAME,
1796 .version = NFC_GENL_VERSION,
1797 .maxattr = NFC_ATTR_MAX,
1798 .module = THIS_MODULE,
1799 .ops = nfc_genl_ops,
1800 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1801 .mcgrps = nfc_genl_mcgrps,
1802 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1806 struct urelease_work {
1807 struct work_struct w;
1811 static void nfc_urelease_event_work(struct work_struct *work)
1813 struct urelease_work *w = container_of(work, struct urelease_work, w);
1814 struct class_dev_iter iter;
1815 struct nfc_dev *dev;
1817 pr_debug("portid %d\n", w->portid);
1819 mutex_lock(&nfc_devlist_mutex);
1821 nfc_device_iter_init(&iter);
1822 dev = nfc_device_iter_next(&iter);
1825 mutex_lock(&dev->genl_data.genl_data_mutex);
1827 if (dev->genl_data.poll_req_portid == w->portid) {
1829 dev->genl_data.poll_req_portid = 0;
1832 mutex_unlock(&dev->genl_data.genl_data_mutex);
1834 dev = nfc_device_iter_next(&iter);
1837 nfc_device_iter_exit(&iter);
1839 mutex_unlock(&nfc_devlist_mutex);
1844 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1845 unsigned long event, void *ptr)
1847 struct netlink_notify *n = ptr;
1848 struct urelease_work *w;
1850 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1853 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1855 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1857 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1858 w->portid = n->portid;
1859 schedule_work((struct work_struct *) w);
1866 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1868 genl_data->poll_req_portid = 0;
1869 mutex_init(&genl_data->genl_data_mutex);
1872 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1874 mutex_destroy(&genl_data->genl_data_mutex);
1877 static struct notifier_block nl_notifier = {
1878 .notifier_call = nfc_genl_rcv_nl_event,
1882 * nfc_genl_init() - Initialize netlink interface
1884 * This initialization function registers the nfc netlink family.
1886 int __init nfc_genl_init(void)
1890 rc = genl_register_family(&nfc_genl_family);
1894 netlink_register_notifier(&nl_notifier);
1900 * nfc_genl_exit() - Deinitialize netlink interface
1902 * This exit function unregisters the nfc netlink family.
1904 void nfc_genl_exit(void)
1906 netlink_unregister_notifier(&nl_notifier);
1907 genl_unregister_family(&nfc_genl_family);