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>
32 #include "llcp/llcp.h"
34 static struct genl_multicast_group nfc_genl_event_mcgrp = {
35 .name = NFC_GENL_MCAST_EVENT_NAME,
38 static struct genl_family nfc_genl_family = {
39 .id = GENL_ID_GENERATE,
41 .name = NFC_GENL_NAME,
42 .version = NFC_GENL_VERSION,
43 .maxattr = NFC_ATTR_MAX,
46 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
47 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
48 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
49 .len = NFC_DEVICE_NAME_MAXSIZE },
50 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
51 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
52 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
53 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
54 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
55 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
56 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
57 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
58 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
59 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
62 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
63 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
64 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
67 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
68 struct netlink_callback *cb, int flags)
72 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
73 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
77 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
79 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
80 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
81 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
82 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
84 if (target->nfcid1_len > 0 &&
85 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
88 if (target->sensb_res_len > 0 &&
89 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
92 if (target->sensf_res_len > 0 &&
93 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
97 return genlmsg_end(msg, hdr);
100 genlmsg_cancel(msg, hdr);
104 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
110 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
111 nfc_genl_family.attrbuf,
112 nfc_genl_family.maxattr,
117 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
118 return ERR_PTR(-EINVAL);
120 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
122 dev = nfc_get_device(idx);
124 return ERR_PTR(-ENODEV);
129 static int nfc_genl_dump_targets(struct sk_buff *skb,
130 struct netlink_callback *cb)
133 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
137 dev = __get_device_from_cb(cb);
141 cb->args[1] = (long) dev;
144 device_lock(&dev->dev);
146 cb->seq = dev->targets_generation;
148 while (i < dev->n_targets) {
149 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
157 device_unlock(&dev->dev);
164 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
166 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
174 int nfc_genl_targets_found(struct nfc_dev *dev)
179 dev->genl_data.poll_req_portid = 0;
181 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
185 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
186 NFC_EVENT_TARGETS_FOUND);
190 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
191 goto nla_put_failure;
193 genlmsg_end(msg, hdr);
195 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
198 genlmsg_cancel(msg, hdr);
204 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
209 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
213 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
214 NFC_EVENT_TARGET_LOST);
218 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
219 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
220 goto nla_put_failure;
222 genlmsg_end(msg, hdr);
224 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
229 genlmsg_cancel(msg, hdr);
235 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
240 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
244 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
245 NFC_EVENT_TM_ACTIVATED);
249 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
250 goto nla_put_failure;
251 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
252 goto nla_put_failure;
254 genlmsg_end(msg, hdr);
256 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
261 genlmsg_cancel(msg, hdr);
267 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
272 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
276 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
277 NFC_EVENT_TM_DEACTIVATED);
281 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
282 goto nla_put_failure;
284 genlmsg_end(msg, hdr);
286 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
291 genlmsg_cancel(msg, hdr);
297 int nfc_genl_device_added(struct nfc_dev *dev)
302 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
306 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
307 NFC_EVENT_DEVICE_ADDED);
311 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
312 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
313 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
314 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
315 goto nla_put_failure;
317 genlmsg_end(msg, hdr);
319 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
324 genlmsg_cancel(msg, hdr);
330 int nfc_genl_device_removed(struct nfc_dev *dev)
335 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
339 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
340 NFC_EVENT_DEVICE_REMOVED);
344 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
345 goto nla_put_failure;
347 genlmsg_end(msg, hdr);
349 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
354 genlmsg_cancel(msg, hdr);
360 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
363 struct nlattr *sdp_attr, *uri_attr;
364 struct nfc_llcp_sdp_tlv *sdres;
365 struct hlist_node *n;
370 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
374 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
375 NFC_EVENT_LLC_SDRES);
379 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
380 goto nla_put_failure;
382 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
383 if (sdp_attr == NULL) {
385 goto nla_put_failure;
389 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
390 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
392 uri_attr = nla_nest_start(msg, i++);
393 if (uri_attr == NULL) {
395 goto nla_put_failure;
398 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
399 goto nla_put_failure;
401 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
402 goto nla_put_failure;
404 nla_nest_end(msg, uri_attr);
406 hlist_del(&sdres->node);
408 nfc_llcp_free_sdp_tlv(sdres);
411 nla_nest_end(msg, sdp_attr);
413 genlmsg_end(msg, hdr);
415 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
418 genlmsg_cancel(msg, hdr);
423 nfc_llcp_free_sdp_tlv_list(sdres_list);
428 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
430 struct netlink_callback *cb,
435 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
441 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
443 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
444 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
445 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
446 nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) ||
447 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
448 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
449 goto nla_put_failure;
451 return genlmsg_end(msg, hdr);
454 genlmsg_cancel(msg, hdr);
458 static int nfc_genl_dump_devices(struct sk_buff *skb,
459 struct netlink_callback *cb)
461 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
462 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
463 bool first_call = false;
467 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
470 cb->args[0] = (long) iter;
473 mutex_lock(&nfc_devlist_mutex);
475 cb->seq = nfc_devlist_generation;
478 nfc_device_iter_init(iter);
479 dev = nfc_device_iter_next(iter);
485 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
486 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
490 dev = nfc_device_iter_next(iter);
493 mutex_unlock(&nfc_devlist_mutex);
495 cb->args[1] = (long) dev;
500 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
502 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
504 nfc_device_iter_exit(iter);
510 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
511 u8 comm_mode, u8 rf_mode)
516 pr_debug("DEP link is up\n");
518 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
522 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
526 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
527 goto nla_put_failure;
528 if (rf_mode == NFC_RF_INITIATOR &&
529 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
530 goto nla_put_failure;
531 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
532 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
533 goto nla_put_failure;
535 genlmsg_end(msg, hdr);
537 dev->dep_link_up = true;
539 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
544 genlmsg_cancel(msg, hdr);
550 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
555 pr_debug("DEP link is down\n");
557 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
561 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
562 NFC_CMD_DEP_LINK_DOWN);
566 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
567 goto nla_put_failure;
569 genlmsg_end(msg, hdr);
571 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
576 genlmsg_cancel(msg, hdr);
582 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
589 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
592 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
594 dev = nfc_get_device(idx);
598 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
604 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
611 return genlmsg_reply(msg, info);
620 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
626 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
629 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
631 dev = nfc_get_device(idx);
635 rc = nfc_dev_up(dev);
641 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
647 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
650 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
652 dev = nfc_get_device(idx);
656 rc = nfc_dev_down(dev);
662 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
667 u32 im_protocols = 0, tm_protocols = 0;
669 pr_debug("Poll start\n");
671 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
672 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
673 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
674 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
677 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
679 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
680 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
682 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
683 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
684 else if (info->attrs[NFC_ATTR_PROTOCOLS])
685 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
687 dev = nfc_get_device(idx);
691 mutex_lock(&dev->genl_data.genl_data_mutex);
693 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
695 dev->genl_data.poll_req_portid = info->snd_portid;
697 mutex_unlock(&dev->genl_data.genl_data_mutex);
703 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
709 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
712 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
714 dev = nfc_get_device(idx);
718 device_lock(&dev->dev);
721 device_unlock(&dev->dev);
725 device_unlock(&dev->dev);
727 mutex_lock(&dev->genl_data.genl_data_mutex);
729 if (dev->genl_data.poll_req_portid != info->snd_portid) {
734 rc = nfc_stop_poll(dev);
735 dev->genl_data.poll_req_portid = 0;
738 mutex_unlock(&dev->genl_data.genl_data_mutex);
743 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
750 pr_debug("DEP link up\n");
752 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
753 !info->attrs[NFC_ATTR_COMM_MODE])
756 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
757 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
758 tgt_idx = NFC_TARGET_IDX_ANY;
760 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
762 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
764 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
767 dev = nfc_get_device(idx);
771 rc = nfc_dep_link_up(dev, tgt_idx, comm);
778 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
784 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
787 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
789 dev = nfc_get_device(idx);
793 rc = nfc_dep_link_down(dev);
799 static int nfc_genl_send_params(struct sk_buff *msg,
800 struct nfc_llcp_local *local,
805 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
806 NFC_CMD_LLC_GET_PARAMS);
810 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
811 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
812 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
813 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
814 goto nla_put_failure;
816 return genlmsg_end(msg, hdr);
820 genlmsg_cancel(msg, hdr);
824 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
827 struct nfc_llcp_local *local;
829 struct sk_buff *msg = NULL;
832 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
835 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
837 dev = nfc_get_device(idx);
841 device_lock(&dev->dev);
843 local = nfc_llcp_find_local(dev);
849 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
855 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
858 device_unlock(&dev->dev);
869 return genlmsg_reply(msg, info);
872 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
875 struct nfc_llcp_local *local;
881 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
882 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
883 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
884 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
887 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
888 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
890 if (rw > LLCP_MAX_RW)
894 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
895 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
897 if (miux > LLCP_MAX_MIUX)
901 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
903 dev = nfc_get_device(idx);
907 device_lock(&dev->dev);
909 local = nfc_llcp_find_local(dev);
916 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
917 if (dev->dep_link_up) {
922 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
925 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
928 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
929 local->miux = cpu_to_be16(miux);
932 device_unlock(&dev->dev);
939 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
942 struct nfc_llcp_local *local;
943 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
948 size_t uri_len, tlvs_len;
949 struct hlist_head sdreq_list;
950 struct nfc_llcp_sdp_tlv *sdreq;
952 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
953 !info->attrs[NFC_ATTR_LLC_SDP])
956 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
958 dev = nfc_get_device(idx);
964 device_lock(&dev->dev);
966 if (dev->dep_link_up == false) {
971 local = nfc_llcp_find_local(dev);
978 INIT_HLIST_HEAD(&sdreq_list);
982 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
983 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
984 nfc_sdp_genl_policy);
991 if (!sdp_attrs[NFC_SDP_ATTR_URI])
994 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
998 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
999 if (uri == NULL || *uri == 0)
1002 tid = local->sdreq_next_tid++;
1004 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1005 if (sdreq == NULL) {
1010 tlvs_len += sdreq->tlv_len;
1012 hlist_add_head(&sdreq->node, &sdreq_list);
1015 if (hlist_empty(&sdreq_list)) {
1020 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1022 device_unlock(&dev->dev);
1024 nfc_put_device(dev);
1029 static struct genl_ops nfc_genl_ops[] = {
1031 .cmd = NFC_CMD_GET_DEVICE,
1032 .doit = nfc_genl_get_device,
1033 .dumpit = nfc_genl_dump_devices,
1034 .done = nfc_genl_dump_devices_done,
1035 .policy = nfc_genl_policy,
1038 .cmd = NFC_CMD_DEV_UP,
1039 .doit = nfc_genl_dev_up,
1040 .policy = nfc_genl_policy,
1043 .cmd = NFC_CMD_DEV_DOWN,
1044 .doit = nfc_genl_dev_down,
1045 .policy = nfc_genl_policy,
1048 .cmd = NFC_CMD_START_POLL,
1049 .doit = nfc_genl_start_poll,
1050 .policy = nfc_genl_policy,
1053 .cmd = NFC_CMD_STOP_POLL,
1054 .doit = nfc_genl_stop_poll,
1055 .policy = nfc_genl_policy,
1058 .cmd = NFC_CMD_DEP_LINK_UP,
1059 .doit = nfc_genl_dep_link_up,
1060 .policy = nfc_genl_policy,
1063 .cmd = NFC_CMD_DEP_LINK_DOWN,
1064 .doit = nfc_genl_dep_link_down,
1065 .policy = nfc_genl_policy,
1068 .cmd = NFC_CMD_GET_TARGET,
1069 .dumpit = nfc_genl_dump_targets,
1070 .done = nfc_genl_dump_targets_done,
1071 .policy = nfc_genl_policy,
1074 .cmd = NFC_CMD_LLC_GET_PARAMS,
1075 .doit = nfc_genl_llc_get_params,
1076 .policy = nfc_genl_policy,
1079 .cmd = NFC_CMD_LLC_SET_PARAMS,
1080 .doit = nfc_genl_llc_set_params,
1081 .policy = nfc_genl_policy,
1084 .cmd = NFC_CMD_LLC_SDREQ,
1085 .doit = nfc_genl_llc_sdreq,
1086 .policy = nfc_genl_policy,
1091 struct urelease_work {
1092 struct work_struct w;
1096 static void nfc_urelease_event_work(struct work_struct *work)
1098 struct urelease_work *w = container_of(work, struct urelease_work, w);
1099 struct class_dev_iter iter;
1100 struct nfc_dev *dev;
1102 pr_debug("portid %d\n", w->portid);
1104 mutex_lock(&nfc_devlist_mutex);
1106 nfc_device_iter_init(&iter);
1107 dev = nfc_device_iter_next(&iter);
1110 mutex_lock(&dev->genl_data.genl_data_mutex);
1112 if (dev->genl_data.poll_req_portid == w->portid) {
1114 dev->genl_data.poll_req_portid = 0;
1117 mutex_unlock(&dev->genl_data.genl_data_mutex);
1119 dev = nfc_device_iter_next(&iter);
1122 nfc_device_iter_exit(&iter);
1124 mutex_unlock(&nfc_devlist_mutex);
1129 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1130 unsigned long event, void *ptr)
1132 struct netlink_notify *n = ptr;
1133 struct urelease_work *w;
1135 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1138 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1140 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1142 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1143 w->portid = n->portid;
1144 schedule_work((struct work_struct *) w);
1151 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1153 genl_data->poll_req_portid = 0;
1154 mutex_init(&genl_data->genl_data_mutex);
1157 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1159 mutex_destroy(&genl_data->genl_data_mutex);
1162 static struct notifier_block nl_notifier = {
1163 .notifier_call = nfc_genl_rcv_nl_event,
1167 * nfc_genl_init() - Initialize netlink interface
1169 * This initialization function registers the nfc netlink family.
1171 int __init nfc_genl_init(void)
1175 rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
1176 ARRAY_SIZE(nfc_genl_ops));
1180 rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
1182 netlink_register_notifier(&nl_notifier);
1188 * nfc_genl_exit() - Deinitialize netlink interface
1190 * This exit function unregisters the nfc netlink family.
1192 void nfc_genl_exit(void)
1194 netlink_unregister_notifier(&nl_notifier);
1195 genl_unregister_family(&nfc_genl_family);