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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
26 #include <net/genetlink.h>
27 #include <linux/nfc.h>
28 #include <linux/slab.h>
33 static struct genl_multicast_group nfc_genl_event_mcgrp = {
34 .name = NFC_GENL_MCAST_EVENT_NAME,
37 static struct genl_family nfc_genl_family = {
38 .id = GENL_ID_GENERATE,
40 .name = NFC_GENL_NAME,
41 .version = NFC_GENL_VERSION,
42 .maxattr = NFC_ATTR_MAX,
45 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
46 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
47 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
48 .len = NFC_DEVICE_NAME_MAXSIZE },
49 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
50 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
51 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
52 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
53 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
54 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
55 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
56 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
57 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
58 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
61 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
62 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
63 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
66 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
67 struct netlink_callback *cb, int flags)
71 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
72 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
76 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
78 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
79 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
80 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
81 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
83 if (target->nfcid1_len > 0 &&
84 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
87 if (target->sensb_res_len > 0 &&
88 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
91 if (target->sensf_res_len > 0 &&
92 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
96 return genlmsg_end(msg, hdr);
99 genlmsg_cancel(msg, hdr);
103 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
109 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
110 nfc_genl_family.attrbuf,
111 nfc_genl_family.maxattr,
116 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
117 return ERR_PTR(-EINVAL);
119 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
121 dev = nfc_get_device(idx);
123 return ERR_PTR(-ENODEV);
128 static int nfc_genl_dump_targets(struct sk_buff *skb,
129 struct netlink_callback *cb)
132 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
136 dev = __get_device_from_cb(cb);
140 cb->args[1] = (long) dev;
143 device_lock(&dev->dev);
145 cb->seq = dev->targets_generation;
147 while (i < dev->n_targets) {
148 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
156 device_unlock(&dev->dev);
163 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
165 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
173 int nfc_genl_targets_found(struct nfc_dev *dev)
178 dev->genl_data.poll_req_portid = 0;
180 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
184 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
185 NFC_EVENT_TARGETS_FOUND);
189 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
190 goto nla_put_failure;
192 genlmsg_end(msg, hdr);
194 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
197 genlmsg_cancel(msg, hdr);
203 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
208 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
212 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
213 NFC_EVENT_TARGET_LOST);
217 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
218 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
219 goto nla_put_failure;
221 genlmsg_end(msg, hdr);
223 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
228 genlmsg_cancel(msg, hdr);
234 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
239 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
243 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
244 NFC_EVENT_TM_ACTIVATED);
248 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
249 goto nla_put_failure;
250 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
251 goto nla_put_failure;
253 genlmsg_end(msg, hdr);
255 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
260 genlmsg_cancel(msg, hdr);
266 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
271 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
275 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
276 NFC_EVENT_TM_DEACTIVATED);
280 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
281 goto nla_put_failure;
283 genlmsg_end(msg, hdr);
285 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
290 genlmsg_cancel(msg, hdr);
296 int nfc_genl_device_added(struct nfc_dev *dev)
301 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
305 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
306 NFC_EVENT_DEVICE_ADDED);
310 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
311 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
312 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
313 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
314 goto nla_put_failure;
316 genlmsg_end(msg, hdr);
318 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
323 genlmsg_cancel(msg, hdr);
329 int nfc_genl_device_removed(struct nfc_dev *dev)
334 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
338 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
339 NFC_EVENT_DEVICE_REMOVED);
343 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
344 goto nla_put_failure;
346 genlmsg_end(msg, hdr);
348 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
353 genlmsg_cancel(msg, hdr);
359 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
362 struct nlattr *sdp_attr, *uri_attr;
363 struct nfc_llcp_sdp_tlv *sdres;
364 struct hlist_node *n;
369 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
373 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
374 NFC_EVENT_LLC_SDRES);
378 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
379 goto nla_put_failure;
381 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
382 if (sdp_attr == NULL) {
384 goto nla_put_failure;
388 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
389 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
391 uri_attr = nla_nest_start(msg, i++);
392 if (uri_attr == NULL) {
394 goto nla_put_failure;
397 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
398 goto nla_put_failure;
400 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
401 goto nla_put_failure;
403 nla_nest_end(msg, uri_attr);
405 hlist_del(&sdres->node);
407 nfc_llcp_free_sdp_tlv(sdres);
410 nla_nest_end(msg, sdp_attr);
412 genlmsg_end(msg, hdr);
414 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
417 genlmsg_cancel(msg, hdr);
422 nfc_llcp_free_sdp_tlv_list(sdres_list);
427 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
429 struct netlink_callback *cb,
434 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
440 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
442 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
443 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
444 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
445 nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) ||
446 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
447 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
448 goto nla_put_failure;
450 return genlmsg_end(msg, hdr);
453 genlmsg_cancel(msg, hdr);
457 static int nfc_genl_dump_devices(struct sk_buff *skb,
458 struct netlink_callback *cb)
460 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
461 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
462 bool first_call = false;
466 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
469 cb->args[0] = (long) iter;
472 mutex_lock(&nfc_devlist_mutex);
474 cb->seq = nfc_devlist_generation;
477 nfc_device_iter_init(iter);
478 dev = nfc_device_iter_next(iter);
484 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
485 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
489 dev = nfc_device_iter_next(iter);
492 mutex_unlock(&nfc_devlist_mutex);
494 cb->args[1] = (long) dev;
499 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
501 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
503 nfc_device_iter_exit(iter);
509 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
510 u8 comm_mode, u8 rf_mode)
515 pr_debug("DEP link is up\n");
517 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
521 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
525 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
526 goto nla_put_failure;
527 if (rf_mode == NFC_RF_INITIATOR &&
528 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
529 goto nla_put_failure;
530 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
531 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
532 goto nla_put_failure;
534 genlmsg_end(msg, hdr);
536 dev->dep_link_up = true;
538 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
543 genlmsg_cancel(msg, hdr);
549 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
554 pr_debug("DEP link is down\n");
556 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
560 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
561 NFC_CMD_DEP_LINK_DOWN);
565 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
566 goto nla_put_failure;
568 genlmsg_end(msg, hdr);
570 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
575 genlmsg_cancel(msg, hdr);
581 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
588 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
591 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
593 dev = nfc_get_device(idx);
597 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
603 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
610 return genlmsg_reply(msg, info);
619 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
625 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
628 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
630 dev = nfc_get_device(idx);
634 rc = nfc_dev_up(dev);
640 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
646 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
649 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
651 dev = nfc_get_device(idx);
655 rc = nfc_dev_down(dev);
661 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
666 u32 im_protocols = 0, tm_protocols = 0;
668 pr_debug("Poll start\n");
670 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
671 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
672 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
673 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
676 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
678 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
679 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
681 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
682 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
683 else if (info->attrs[NFC_ATTR_PROTOCOLS])
684 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
686 dev = nfc_get_device(idx);
690 mutex_lock(&dev->genl_data.genl_data_mutex);
692 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
694 dev->genl_data.poll_req_portid = info->snd_portid;
696 mutex_unlock(&dev->genl_data.genl_data_mutex);
702 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
708 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
711 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
713 dev = nfc_get_device(idx);
717 device_lock(&dev->dev);
720 device_unlock(&dev->dev);
724 device_unlock(&dev->dev);
726 mutex_lock(&dev->genl_data.genl_data_mutex);
728 if (dev->genl_data.poll_req_portid != info->snd_portid) {
733 rc = nfc_stop_poll(dev);
734 dev->genl_data.poll_req_portid = 0;
737 mutex_unlock(&dev->genl_data.genl_data_mutex);
742 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
749 pr_debug("DEP link up\n");
751 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
752 !info->attrs[NFC_ATTR_COMM_MODE])
755 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
756 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
757 tgt_idx = NFC_TARGET_IDX_ANY;
759 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
761 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
763 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
766 dev = nfc_get_device(idx);
770 rc = nfc_dep_link_up(dev, tgt_idx, comm);
777 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
783 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
786 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
788 dev = nfc_get_device(idx);
792 rc = nfc_dep_link_down(dev);
798 static int nfc_genl_send_params(struct sk_buff *msg,
799 struct nfc_llcp_local *local,
804 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
805 NFC_CMD_LLC_GET_PARAMS);
809 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
810 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
811 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
812 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
813 goto nla_put_failure;
815 return genlmsg_end(msg, hdr);
819 genlmsg_cancel(msg, hdr);
823 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
826 struct nfc_llcp_local *local;
828 struct sk_buff *msg = NULL;
831 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
834 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
836 dev = nfc_get_device(idx);
840 device_lock(&dev->dev);
842 local = nfc_llcp_find_local(dev);
848 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
854 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
857 device_unlock(&dev->dev);
868 return genlmsg_reply(msg, info);
871 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
874 struct nfc_llcp_local *local;
880 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
881 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
882 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
883 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
886 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
887 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
889 if (rw > LLCP_MAX_RW)
893 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
894 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
896 if (miux > LLCP_MAX_MIUX)
900 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
902 dev = nfc_get_device(idx);
906 device_lock(&dev->dev);
908 local = nfc_llcp_find_local(dev);
915 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
916 if (dev->dep_link_up) {
921 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
924 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
927 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
928 local->miux = cpu_to_be16(miux);
931 device_unlock(&dev->dev);
938 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
941 struct nfc_llcp_local *local;
942 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
947 size_t uri_len, tlvs_len;
948 struct hlist_head sdreq_list;
949 struct nfc_llcp_sdp_tlv *sdreq;
951 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
952 !info->attrs[NFC_ATTR_LLC_SDP])
955 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
957 dev = nfc_get_device(idx);
963 device_lock(&dev->dev);
965 if (dev->dep_link_up == false) {
970 local = nfc_llcp_find_local(dev);
977 INIT_HLIST_HEAD(&sdreq_list);
981 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
982 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
983 nfc_sdp_genl_policy);
990 if (!sdp_attrs[NFC_SDP_ATTR_URI])
993 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
997 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
998 if (uri == NULL || *uri == 0)
1001 tid = local->sdreq_next_tid++;
1003 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1004 if (sdreq == NULL) {
1009 tlvs_len += sdreq->tlv_len;
1011 hlist_add_head(&sdreq->node, &sdreq_list);
1014 if (hlist_empty(&sdreq_list)) {
1019 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1021 device_unlock(&dev->dev);
1023 nfc_put_device(dev);
1028 static struct genl_ops nfc_genl_ops[] = {
1030 .cmd = NFC_CMD_GET_DEVICE,
1031 .doit = nfc_genl_get_device,
1032 .dumpit = nfc_genl_dump_devices,
1033 .done = nfc_genl_dump_devices_done,
1034 .policy = nfc_genl_policy,
1037 .cmd = NFC_CMD_DEV_UP,
1038 .doit = nfc_genl_dev_up,
1039 .policy = nfc_genl_policy,
1042 .cmd = NFC_CMD_DEV_DOWN,
1043 .doit = nfc_genl_dev_down,
1044 .policy = nfc_genl_policy,
1047 .cmd = NFC_CMD_START_POLL,
1048 .doit = nfc_genl_start_poll,
1049 .policy = nfc_genl_policy,
1052 .cmd = NFC_CMD_STOP_POLL,
1053 .doit = nfc_genl_stop_poll,
1054 .policy = nfc_genl_policy,
1057 .cmd = NFC_CMD_DEP_LINK_UP,
1058 .doit = nfc_genl_dep_link_up,
1059 .policy = nfc_genl_policy,
1062 .cmd = NFC_CMD_DEP_LINK_DOWN,
1063 .doit = nfc_genl_dep_link_down,
1064 .policy = nfc_genl_policy,
1067 .cmd = NFC_CMD_GET_TARGET,
1068 .dumpit = nfc_genl_dump_targets,
1069 .done = nfc_genl_dump_targets_done,
1070 .policy = nfc_genl_policy,
1073 .cmd = NFC_CMD_LLC_GET_PARAMS,
1074 .doit = nfc_genl_llc_get_params,
1075 .policy = nfc_genl_policy,
1078 .cmd = NFC_CMD_LLC_SET_PARAMS,
1079 .doit = nfc_genl_llc_set_params,
1080 .policy = nfc_genl_policy,
1083 .cmd = NFC_CMD_LLC_SDREQ,
1084 .doit = nfc_genl_llc_sdreq,
1085 .policy = nfc_genl_policy,
1090 struct urelease_work {
1091 struct work_struct w;
1095 static void nfc_urelease_event_work(struct work_struct *work)
1097 struct urelease_work *w = container_of(work, struct urelease_work, w);
1098 struct class_dev_iter iter;
1099 struct nfc_dev *dev;
1101 pr_debug("portid %d\n", w->portid);
1103 mutex_lock(&nfc_devlist_mutex);
1105 nfc_device_iter_init(&iter);
1106 dev = nfc_device_iter_next(&iter);
1109 mutex_lock(&dev->genl_data.genl_data_mutex);
1111 if (dev->genl_data.poll_req_portid == w->portid) {
1113 dev->genl_data.poll_req_portid = 0;
1116 mutex_unlock(&dev->genl_data.genl_data_mutex);
1118 dev = nfc_device_iter_next(&iter);
1121 nfc_device_iter_exit(&iter);
1123 mutex_unlock(&nfc_devlist_mutex);
1128 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1129 unsigned long event, void *ptr)
1131 struct netlink_notify *n = ptr;
1132 struct urelease_work *w;
1134 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1137 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1139 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1141 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1142 w->portid = n->portid;
1143 schedule_work((struct work_struct *) w);
1150 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1152 genl_data->poll_req_portid = 0;
1153 mutex_init(&genl_data->genl_data_mutex);
1156 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1158 mutex_destroy(&genl_data->genl_data_mutex);
1161 static struct notifier_block nl_notifier = {
1162 .notifier_call = nfc_genl_rcv_nl_event,
1166 * nfc_genl_init() - Initialize netlink interface
1168 * This initialization function registers the nfc netlink family.
1170 int __init nfc_genl_init(void)
1174 rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
1175 ARRAY_SIZE(nfc_genl_ops));
1179 rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
1181 netlink_register_notifier(&nl_notifier);
1187 * nfc_genl_exit() - Deinitialize netlink interface
1189 * This exit function unregisters the nfc netlink family.
1191 void nfc_genl_exit(void)
1193 netlink_unregister_notifier(&nl_notifier);
1194 genl_unregister_family(&nfc_genl_family);