871 lines
18 KiB
C
871 lines
18 KiB
C
/*
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* Copyright (C) 2011 Instituto Nokia de Tecnologia
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*
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* Authors:
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* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
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* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
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#include <net/genetlink.h>
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#include <linux/nfc.h>
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#include <linux/slab.h>
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#include "nfc.h"
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static struct genl_multicast_group nfc_genl_event_mcgrp = {
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.name = NFC_GENL_MCAST_EVENT_NAME,
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};
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static struct genl_family nfc_genl_family = {
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.id = GENL_ID_GENERATE,
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.hdrsize = 0,
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.name = NFC_GENL_NAME,
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.version = NFC_GENL_VERSION,
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.maxattr = NFC_ATTR_MAX,
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};
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static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
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[NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
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[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
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.len = NFC_DEVICE_NAME_MAXSIZE },
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[NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
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[NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
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[NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
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[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
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[NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
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[NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
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};
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static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
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struct netlink_callback *cb, int flags)
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{
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void *hdr;
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hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
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&nfc_genl_family, flags, NFC_CMD_GET_TARGET);
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if (!hdr)
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return -EMSGSIZE;
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genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
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if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
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nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
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nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
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nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
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goto nla_put_failure;
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if (target->nfcid1_len > 0 &&
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nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
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target->nfcid1))
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goto nla_put_failure;
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if (target->sensb_res_len > 0 &&
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nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
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target->sensb_res))
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goto nla_put_failure;
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if (target->sensf_res_len > 0 &&
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nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
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target->sensf_res))
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goto nla_put_failure;
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return genlmsg_end(msg, hdr);
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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return -EMSGSIZE;
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}
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static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
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{
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struct nfc_dev *dev;
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int rc;
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u32 idx;
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rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
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nfc_genl_family.attrbuf,
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nfc_genl_family.maxattr,
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nfc_genl_policy);
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if (rc < 0)
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return ERR_PTR(rc);
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if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
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return ERR_PTR(-EINVAL);
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idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
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dev = nfc_get_device(idx);
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if (!dev)
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return ERR_PTR(-ENODEV);
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return dev;
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}
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static int nfc_genl_dump_targets(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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int i = cb->args[0];
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struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
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int rc;
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if (!dev) {
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dev = __get_device_from_cb(cb);
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if (IS_ERR(dev))
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return PTR_ERR(dev);
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cb->args[1] = (long) dev;
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}
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device_lock(&dev->dev);
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cb->seq = dev->targets_generation;
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while (i < dev->n_targets) {
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rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
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NLM_F_MULTI);
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if (rc < 0)
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break;
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i++;
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}
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device_unlock(&dev->dev);
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cb->args[0] = i;
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return skb->len;
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}
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static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
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{
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struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
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if (dev)
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nfc_put_device(dev);
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return 0;
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}
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int nfc_genl_targets_found(struct nfc_dev *dev)
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{
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struct sk_buff *msg;
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void *hdr;
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dev->genl_data.poll_req_portid = 0;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_TARGETS_FOUND);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
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{
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struct sk_buff *msg;
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void *hdr;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_TARGET_LOST);
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if (!hdr)
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goto free_msg;
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if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
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nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
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{
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struct sk_buff *msg;
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void *hdr;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_TM_ACTIVATED);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_tm_deactivated(struct nfc_dev *dev)
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{
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struct sk_buff *msg;
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void *hdr;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_TM_DEACTIVATED);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_device_added(struct nfc_dev *dev)
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{
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struct sk_buff *msg;
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void *hdr;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_DEVICE_ADDED);
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if (!hdr)
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goto free_msg;
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if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
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nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
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nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
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nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_device_removed(struct nfc_dev *dev)
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{
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struct sk_buff *msg;
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void *hdr;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_EVENT_DEVICE_REMOVED);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
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u32 portid, u32 seq,
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struct netlink_callback *cb,
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int flags)
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{
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void *hdr;
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hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
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NFC_CMD_GET_DEVICE);
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if (!hdr)
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return -EMSGSIZE;
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if (cb)
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genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
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if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
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nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
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nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
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nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
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goto nla_put_failure;
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return genlmsg_end(msg, hdr);
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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return -EMSGSIZE;
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}
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static int nfc_genl_dump_devices(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
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struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
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bool first_call = false;
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if (!iter) {
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first_call = true;
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iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
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if (!iter)
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return -ENOMEM;
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cb->args[0] = (long) iter;
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}
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mutex_lock(&nfc_devlist_mutex);
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cb->seq = nfc_devlist_generation;
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if (first_call) {
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nfc_device_iter_init(iter);
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dev = nfc_device_iter_next(iter);
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}
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while (dev) {
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int rc;
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rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
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if (rc < 0)
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break;
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dev = nfc_device_iter_next(iter);
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}
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mutex_unlock(&nfc_devlist_mutex);
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cb->args[1] = (long) dev;
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return skb->len;
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}
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static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
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{
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struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
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nfc_device_iter_exit(iter);
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kfree(iter);
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return 0;
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}
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int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
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u8 comm_mode, u8 rf_mode)
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{
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struct sk_buff *msg;
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void *hdr;
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pr_debug("DEP link is up\n");
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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if (rf_mode == NFC_RF_INITIATOR &&
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nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
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goto nla_put_failure;
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if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
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nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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dev->dep_link_up = true;
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
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{
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struct sk_buff *msg;
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void *hdr;
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pr_debug("DEP link is down\n");
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!msg)
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return -ENOMEM;
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
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NFC_CMD_DEP_LINK_DOWN);
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if (!hdr)
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goto free_msg;
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
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{
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struct sk_buff *msg;
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struct nfc_dev *dev;
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u32 idx;
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int rc = -ENOBUFS;
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
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return -EINVAL;
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idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
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|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (!msg) {
|
|
rc = -ENOMEM;
|
|
goto out_putdev;
|
|
}
|
|
|
|
rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
|
|
NULL, 0);
|
|
if (rc < 0)
|
|
goto out_free;
|
|
|
|
nfc_put_device(dev);
|
|
|
|
return genlmsg_reply(msg, info);
|
|
|
|
out_free:
|
|
nlmsg_free(msg);
|
|
out_putdev:
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc;
|
|
u32 idx;
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
rc = nfc_dev_up(dev);
|
|
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc;
|
|
u32 idx;
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
rc = nfc_dev_down(dev);
|
|
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc;
|
|
u32 idx;
|
|
u32 im_protocols = 0, tm_protocols = 0;
|
|
|
|
pr_debug("Poll start\n");
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
|
|
((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
|
|
!info->attrs[NFC_ATTR_PROTOCOLS]) &&
|
|
!info->attrs[NFC_ATTR_TM_PROTOCOLS]))
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
|
|
if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
|
|
tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
|
|
|
|
if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
|
|
im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
|
|
else if (info->attrs[NFC_ATTR_PROTOCOLS])
|
|
im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&dev->genl_data.genl_data_mutex);
|
|
|
|
rc = nfc_start_poll(dev, im_protocols, tm_protocols);
|
|
if (!rc)
|
|
dev->genl_data.poll_req_portid = info->snd_portid;
|
|
|
|
mutex_unlock(&dev->genl_data.genl_data_mutex);
|
|
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc;
|
|
u32 idx;
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
device_lock(&dev->dev);
|
|
|
|
if (!dev->polling) {
|
|
device_unlock(&dev->dev);
|
|
return -EINVAL;
|
|
}
|
|
|
|
device_unlock(&dev->dev);
|
|
|
|
mutex_lock(&dev->genl_data.genl_data_mutex);
|
|
|
|
if (dev->genl_data.poll_req_portid != info->snd_portid) {
|
|
rc = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
rc = nfc_stop_poll(dev);
|
|
dev->genl_data.poll_req_portid = 0;
|
|
|
|
out:
|
|
mutex_unlock(&dev->genl_data.genl_data_mutex);
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc, tgt_idx;
|
|
u32 idx;
|
|
u8 comm;
|
|
|
|
pr_debug("DEP link up\n");
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
|
|
!info->attrs[NFC_ATTR_COMM_MODE])
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
if (!info->attrs[NFC_ATTR_TARGET_INDEX])
|
|
tgt_idx = NFC_TARGET_IDX_ANY;
|
|
else
|
|
tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
|
|
|
|
comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
|
|
|
|
if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
|
|
return -EINVAL;
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
rc = nfc_dep_link_up(dev, tgt_idx, comm);
|
|
|
|
nfc_put_device(dev);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nfc_dev *dev;
|
|
int rc;
|
|
u32 idx;
|
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
|
|
return -EINVAL;
|
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
|
|
|
|
dev = nfc_get_device(idx);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
rc = nfc_dep_link_down(dev);
|
|
|
|
nfc_put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static struct genl_ops nfc_genl_ops[] = {
|
|
{
|
|
.cmd = NFC_CMD_GET_DEVICE,
|
|
.doit = nfc_genl_get_device,
|
|
.dumpit = nfc_genl_dump_devices,
|
|
.done = nfc_genl_dump_devices_done,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_DEV_UP,
|
|
.doit = nfc_genl_dev_up,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_DEV_DOWN,
|
|
.doit = nfc_genl_dev_down,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_START_POLL,
|
|
.doit = nfc_genl_start_poll,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_STOP_POLL,
|
|
.doit = nfc_genl_stop_poll,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_DEP_LINK_UP,
|
|
.doit = nfc_genl_dep_link_up,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_DEP_LINK_DOWN,
|
|
.doit = nfc_genl_dep_link_down,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
{
|
|
.cmd = NFC_CMD_GET_TARGET,
|
|
.dumpit = nfc_genl_dump_targets,
|
|
.done = nfc_genl_dump_targets_done,
|
|
.policy = nfc_genl_policy,
|
|
},
|
|
};
|
|
|
|
|
|
struct urelease_work {
|
|
struct work_struct w;
|
|
int portid;
|
|
};
|
|
|
|
static void nfc_urelease_event_work(struct work_struct *work)
|
|
{
|
|
struct urelease_work *w = container_of(work, struct urelease_work, w);
|
|
struct class_dev_iter iter;
|
|
struct nfc_dev *dev;
|
|
|
|
pr_debug("portid %d\n", w->portid);
|
|
|
|
mutex_lock(&nfc_devlist_mutex);
|
|
|
|
nfc_device_iter_init(&iter);
|
|
dev = nfc_device_iter_next(&iter);
|
|
|
|
while (dev) {
|
|
mutex_lock(&dev->genl_data.genl_data_mutex);
|
|
|
|
if (dev->genl_data.poll_req_portid == w->portid) {
|
|
nfc_stop_poll(dev);
|
|
dev->genl_data.poll_req_portid = 0;
|
|
}
|
|
|
|
mutex_unlock(&dev->genl_data.genl_data_mutex);
|
|
|
|
dev = nfc_device_iter_next(&iter);
|
|
}
|
|
|
|
nfc_device_iter_exit(&iter);
|
|
|
|
mutex_unlock(&nfc_devlist_mutex);
|
|
|
|
kfree(w);
|
|
}
|
|
|
|
static int nfc_genl_rcv_nl_event(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct netlink_notify *n = ptr;
|
|
struct urelease_work *w;
|
|
|
|
if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
|
|
goto out;
|
|
|
|
pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
|
|
|
|
w = kmalloc(sizeof(*w), GFP_ATOMIC);
|
|
if (w) {
|
|
INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
|
|
w->portid = n->portid;
|
|
schedule_work((struct work_struct *) w);
|
|
}
|
|
|
|
out:
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
void nfc_genl_data_init(struct nfc_genl_data *genl_data)
|
|
{
|
|
genl_data->poll_req_portid = 0;
|
|
mutex_init(&genl_data->genl_data_mutex);
|
|
}
|
|
|
|
void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
|
|
{
|
|
mutex_destroy(&genl_data->genl_data_mutex);
|
|
}
|
|
|
|
static struct notifier_block nl_notifier = {
|
|
.notifier_call = nfc_genl_rcv_nl_event,
|
|
};
|
|
|
|
/**
|
|
* nfc_genl_init() - Initialize netlink interface
|
|
*
|
|
* This initialization function registers the nfc netlink family.
|
|
*/
|
|
int __init nfc_genl_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
|
|
ARRAY_SIZE(nfc_genl_ops));
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
|
|
|
|
netlink_register_notifier(&nl_notifier);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* nfc_genl_exit() - Deinitialize netlink interface
|
|
*
|
|
* This exit function unregisters the nfc netlink family.
|
|
*/
|
|
void nfc_genl_exit(void)
|
|
{
|
|
netlink_unregister_notifier(&nl_notifier);
|
|
genl_unregister_family(&nfc_genl_family);
|
|
}
|