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1874 lines
39 KiB
1874 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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* Aloisio Almeida Jr <[email protected]> |
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* |
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* Vendor commands implementation based on net/wireless/nl80211.c |
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* which is: |
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* |
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* Copyright 2006-2010 Johannes Berg <[email protected]> |
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* Copyright 2013-2014 Intel Mobile Communications GmbH |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
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|
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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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|
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#include "nfc.h" |
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#include "llcp.h" |
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static const struct genl_multicast_group nfc_genl_mcgrps[] = { |
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{ .name = NFC_GENL_MCAST_EVENT_NAME, }, |
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}; |
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|
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static struct genl_family nfc_genl_family; |
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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_TARGET_INDEX] = { .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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[NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, |
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[NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, |
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[NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, |
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[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, |
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[NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, |
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.len = NFC_FIRMWARE_NAME_MAXSIZE }, |
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[NFC_ATTR_SE_INDEX] = { .type = NLA_U32 }, |
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[NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, |
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[NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 }, |
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[NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 }, |
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[NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY }, |
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|
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}; |
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|
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static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { |
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[NFC_SDP_ATTR_URI] = { .type = NLA_STRING, |
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.len = U8_MAX - 4 }, |
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[NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, |
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}; |
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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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|
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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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|
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genl_dump_check_consistent(cb, hdr); |
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|
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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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|
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if (target->is_iso15693) { |
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if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID, |
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target->iso15693_dsfid) || |
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nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID, |
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sizeof(target->iso15693_uid), target->iso15693_uid)) |
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goto nla_put_failure; |
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} |
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genlmsg_end(msg, hdr); |
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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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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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const struct genl_dumpit_info *info = genl_dumpit_info(cb); |
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struct nfc_dev *dev; |
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u32 idx; |
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
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return ERR_PTR(-EINVAL); |
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idx = nla_get_u32(info->attrs[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(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
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nla_put_failure: |
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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(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
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return 0; |
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nla_put_failure: |
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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(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
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return 0; |
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nla_put_failure: |
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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(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
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return 0; |
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nla_put_failure: |
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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_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg) |
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{ |
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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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nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) |
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return -1; |
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return 0; |
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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 (nfc_genl_setup_device_added(dev, msg)) |
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goto nla_put_failure; |
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genlmsg_end(msg, hdr); |
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genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
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return 0; |
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nla_put_failure: |
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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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|
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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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|
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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(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
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return 0; |
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nla_put_failure: |
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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_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) |
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{ |
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struct sk_buff *msg; |
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struct nlattr *sdp_attr, *uri_attr; |
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struct nfc_llcp_sdp_tlv *sdres; |
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struct hlist_node *n; |
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void *hdr; |
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int rc = -EMSGSIZE; |
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int i; |
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|
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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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|
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
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NFC_EVENT_LLC_SDRES); |
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if (!hdr) |
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goto free_msg; |
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|
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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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|
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sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP); |
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if (sdp_attr == NULL) { |
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rc = -ENOMEM; |
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goto nla_put_failure; |
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} |
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|
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i = 1; |
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hlist_for_each_entry_safe(sdres, n, sdres_list, node) { |
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pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); |
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|
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uri_attr = nla_nest_start_noflag(msg, i++); |
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if (uri_attr == NULL) { |
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rc = -ENOMEM; |
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goto nla_put_failure; |
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} |
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|
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if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) |
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goto nla_put_failure; |
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|
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if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) |
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goto nla_put_failure; |
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nla_nest_end(msg, uri_attr); |
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hlist_del(&sdres->node); |
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nfc_llcp_free_sdp_tlv(sdres); |
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} |
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nla_nest_end(msg, sdp_attr); |
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genlmsg_end(msg, hdr); |
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return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
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|
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nla_put_failure: |
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free_msg: |
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nlmsg_free(msg); |
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|
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nfc_llcp_free_sdp_tlv_list(sdres_list); |
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|
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return rc; |
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} |
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|
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int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) |
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{ |
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struct sk_buff *msg; |
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void *hdr; |
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|
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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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|
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hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
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NFC_EVENT_SE_ADDED); |
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if (!hdr) |
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goto free_msg; |
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|
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if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
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nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || |
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nla_put_u8(msg, NFC_ATTR_SE_TYPE, type)) |
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goto nla_put_failure; |
|
|
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genlmsg_end(msg, hdr); |
|
|
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genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
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return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
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int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) |
|
{ |
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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_SE_REMOVED); |
|
if (!hdr) |
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goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
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nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, |
|
struct nfc_evt_transaction *evt_transaction) |
|
{ |
|
struct nfc_se *se; |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (!msg) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
|
NFC_EVENT_SE_TRANSACTION); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
se = nfc_find_se(dev, se_idx); |
|
if (!se) |
|
goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
|
nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || |
|
nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) || |
|
nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len, |
|
evt_transaction->aid) || |
|
nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len, |
|
evt_transaction->params)) |
|
goto nla_put_failure; |
|
|
|
/* evt_transaction is no more used */ |
|
devm_kfree(&dev->dev, evt_transaction); |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
/* evt_transaction is no more used */ |
|
devm_kfree(&dev->dev, evt_transaction); |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx) |
|
{ |
|
const struct nfc_se *se; |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (!msg) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
|
NFC_EVENT_SE_CONNECTIVITY); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
se = nfc_find_se(dev, se_idx); |
|
if (!se) |
|
goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
|
nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || |
|
nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, |
|
u32 portid, u32 seq, |
|
struct netlink_callback *cb, |
|
int flags) |
|
{ |
|
void *hdr; |
|
|
|
hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, |
|
NFC_CMD_GET_DEVICE); |
|
if (!hdr) |
|
return -EMSGSIZE; |
|
|
|
if (cb) |
|
genl_dump_check_consistent(cb, hdr); |
|
|
|
if (nfc_genl_setup_device_added(dev, msg)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
return 0; |
|
|
|
nla_put_failure: |
|
genlmsg_cancel(msg, hdr); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_dump_devices(struct sk_buff *skb, |
|
struct netlink_callback *cb) |
|
{ |
|
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
|
struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
|
bool first_call = false; |
|
|
|
if (!iter) { |
|
first_call = true; |
|
iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); |
|
if (!iter) |
|
return -ENOMEM; |
|
cb->args[0] = (long) iter; |
|
} |
|
|
|
mutex_lock(&nfc_devlist_mutex); |
|
|
|
cb->seq = nfc_devlist_generation; |
|
|
|
if (first_call) { |
|
nfc_device_iter_init(iter); |
|
dev = nfc_device_iter_next(iter); |
|
} |
|
|
|
while (dev) { |
|
int rc; |
|
|
|
rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
|
if (rc < 0) |
|
break; |
|
|
|
dev = nfc_device_iter_next(iter); |
|
} |
|
|
|
mutex_unlock(&nfc_devlist_mutex); |
|
|
|
cb->args[1] = (long) dev; |
|
|
|
return skb->len; |
|
} |
|
|
|
static int nfc_genl_dump_devices_done(struct netlink_callback *cb) |
|
{ |
|
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
|
|
|
nfc_device_iter_exit(iter); |
|
kfree(iter); |
|
|
|
return 0; |
|
} |
|
|
|
int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, |
|
u8 comm_mode, u8 rf_mode) |
|
{ |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
|
pr_debug("DEP link is up\n"); |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
|
if (!msg) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
|
goto nla_put_failure; |
|
if (rf_mode == NFC_RF_INITIATOR && |
|
nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx)) |
|
goto nla_put_failure; |
|
if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) || |
|
nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
dev->dep_link_up = true; |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
int nfc_genl_dep_link_down_event(struct nfc_dev *dev) |
|
{ |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
|
pr_debug("DEP link is down\n"); |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
|
if (!msg) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
|
NFC_CMD_DEP_LINK_DOWN); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct sk_buff *msg; |
|
struct nfc_dev *dev; |
|
u32 idx; |
|
int rc = -ENOBUFS; |
|
|
|
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; |
|
|
|
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); |
|
nfc_put_device(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_activate_target(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
u32 device_idx, target_idx, protocol; |
|
int rc; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_TARGET_INDEX] || |
|
!info->attrs[NFC_ATTR_PROTOCOLS]) |
|
return -EINVAL; |
|
|
|
device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
|
|
dev = nfc_get_device(device_idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); |
|
protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); |
|
|
|
nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); |
|
rc = nfc_activate_target(dev, target_idx, protocol); |
|
|
|
nfc_put_device(dev); |
|
return rc; |
|
} |
|
|
|
static int nfc_genl_deactivate_target(struct sk_buff *skb, |
|
struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
u32 device_idx, target_idx; |
|
int rc; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_TARGET_INDEX]) |
|
return -EINVAL; |
|
|
|
device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
|
|
dev = nfc_get_device(device_idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]); |
|
|
|
rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP); |
|
|
|
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] || |
|
!info->attrs[NFC_ATTR_TARGET_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 int nfc_genl_send_params(struct sk_buff *msg, |
|
struct nfc_llcp_local *local, |
|
u32 portid, u32 seq) |
|
{ |
|
void *hdr; |
|
|
|
hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0, |
|
NFC_CMD_LLC_GET_PARAMS); |
|
if (!hdr) |
|
return -EMSGSIZE; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) || |
|
nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) || |
|
nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) || |
|
nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux))) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
return 0; |
|
|
|
nla_put_failure: |
|
genlmsg_cancel(msg, hdr); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
struct nfc_llcp_local *local; |
|
int rc = 0; |
|
struct sk_buff *msg = NULL; |
|
u32 idx; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_FIRMWARE_NAME]) |
|
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); |
|
|
|
local = nfc_llcp_find_local(dev); |
|
if (!local) { |
|
rc = -ENODEV; |
|
goto exit; |
|
} |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (!msg) { |
|
rc = -ENOMEM; |
|
goto exit; |
|
} |
|
|
|
rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq); |
|
|
|
exit: |
|
device_unlock(&dev->dev); |
|
|
|
nfc_put_device(dev); |
|
|
|
if (rc < 0) { |
|
if (msg) |
|
nlmsg_free(msg); |
|
|
|
return rc; |
|
} |
|
|
|
return genlmsg_reply(msg, info); |
|
} |
|
|
|
static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
struct nfc_llcp_local *local; |
|
u8 rw = 0; |
|
u16 miux = 0; |
|
u32 idx; |
|
int rc = 0; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
(!info->attrs[NFC_ATTR_LLC_PARAM_LTO] && |
|
!info->attrs[NFC_ATTR_LLC_PARAM_RW] && |
|
!info->attrs[NFC_ATTR_LLC_PARAM_MIUX])) |
|
return -EINVAL; |
|
|
|
if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) { |
|
rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]); |
|
|
|
if (rw > LLCP_MAX_RW) |
|
return -EINVAL; |
|
} |
|
|
|
if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) { |
|
miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]); |
|
|
|
if (miux > LLCP_MAX_MIUX) |
|
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); |
|
|
|
local = nfc_llcp_find_local(dev); |
|
if (!local) { |
|
rc = -ENODEV; |
|
goto exit; |
|
} |
|
|
|
if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) { |
|
if (dev->dep_link_up) { |
|
rc = -EINPROGRESS; |
|
goto exit; |
|
} |
|
|
|
local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]); |
|
} |
|
|
|
if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) |
|
local->rw = rw; |
|
|
|
if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) |
|
local->miux = cpu_to_be16(miux); |
|
|
|
exit: |
|
device_unlock(&dev->dev); |
|
|
|
nfc_put_device(dev); |
|
|
|
return rc; |
|
} |
|
|
|
static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
struct nfc_llcp_local *local; |
|
struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1]; |
|
u32 idx; |
|
u8 tid; |
|
char *uri; |
|
int rc = 0, rem; |
|
size_t uri_len, tlvs_len; |
|
struct hlist_head sdreq_list; |
|
struct nfc_llcp_sdp_tlv *sdreq; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_LLC_SDP]) |
|
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->dep_link_up == false) { |
|
rc = -ENOLINK; |
|
goto exit; |
|
} |
|
|
|
local = nfc_llcp_find_local(dev); |
|
if (!local) { |
|
rc = -ENODEV; |
|
goto exit; |
|
} |
|
|
|
INIT_HLIST_HEAD(&sdreq_list); |
|
|
|
tlvs_len = 0; |
|
|
|
nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) { |
|
rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX, |
|
attr, nfc_sdp_genl_policy, |
|
info->extack); |
|
|
|
if (rc != 0) { |
|
rc = -EINVAL; |
|
goto exit; |
|
} |
|
|
|
if (!sdp_attrs[NFC_SDP_ATTR_URI]) |
|
continue; |
|
|
|
uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]); |
|
if (uri_len == 0) |
|
continue; |
|
|
|
uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]); |
|
if (uri == NULL || *uri == 0) |
|
continue; |
|
|
|
tid = local->sdreq_next_tid++; |
|
|
|
sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len); |
|
if (sdreq == NULL) { |
|
rc = -ENOMEM; |
|
goto exit; |
|
} |
|
|
|
tlvs_len += sdreq->tlv_len; |
|
|
|
hlist_add_head(&sdreq->node, &sdreq_list); |
|
} |
|
|
|
if (hlist_empty(&sdreq_list)) { |
|
rc = -EINVAL; |
|
goto exit; |
|
} |
|
|
|
rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len); |
|
exit: |
|
device_unlock(&dev->dev); |
|
|
|
nfc_put_device(dev); |
|
|
|
return rc; |
|
} |
|
|
|
static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
int rc; |
|
u32 idx; |
|
char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1]; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME]) |
|
return -EINVAL; |
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
|
|
dev = nfc_get_device(idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME], |
|
sizeof(firmware_name)); |
|
|
|
rc = nfc_fw_download(dev, firmware_name); |
|
|
|
nfc_put_device(dev); |
|
return rc; |
|
} |
|
|
|
int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name, |
|
u32 result) |
|
{ |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (!msg) |
|
return -ENOMEM; |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
|
NFC_CMD_FW_DOWNLOAD); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) || |
|
nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) || |
|
nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
int rc; |
|
u32 idx, se_idx; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_SE_INDEX]) |
|
return -EINVAL; |
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); |
|
|
|
dev = nfc_get_device(idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
rc = nfc_enable_se(dev, se_idx); |
|
|
|
nfc_put_device(dev); |
|
return rc; |
|
} |
|
|
|
static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
int rc; |
|
u32 idx, se_idx; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_SE_INDEX]) |
|
return -EINVAL; |
|
|
|
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); |
|
|
|
dev = nfc_get_device(idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
rc = nfc_disable_se(dev, se_idx); |
|
|
|
nfc_put_device(dev); |
|
return rc; |
|
} |
|
|
|
static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev, |
|
u32 portid, u32 seq, |
|
struct netlink_callback *cb, |
|
int flags) |
|
{ |
|
void *hdr; |
|
struct nfc_se *se, *n; |
|
|
|
list_for_each_entry_safe(se, n, &dev->secure_elements, list) { |
|
hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags, |
|
NFC_CMD_GET_SE); |
|
if (!hdr) |
|
goto nla_put_failure; |
|
|
|
if (cb) |
|
genl_dump_check_consistent(cb, hdr); |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
|
nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) || |
|
nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
} |
|
|
|
return 0; |
|
|
|
nla_put_failure: |
|
genlmsg_cancel(msg, hdr); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int nfc_genl_dump_ses(struct sk_buff *skb, |
|
struct netlink_callback *cb) |
|
{ |
|
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
|
struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
|
bool first_call = false; |
|
|
|
if (!iter) { |
|
first_call = true; |
|
iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL); |
|
if (!iter) |
|
return -ENOMEM; |
|
cb->args[0] = (long) iter; |
|
} |
|
|
|
mutex_lock(&nfc_devlist_mutex); |
|
|
|
cb->seq = nfc_devlist_generation; |
|
|
|
if (first_call) { |
|
nfc_device_iter_init(iter); |
|
dev = nfc_device_iter_next(iter); |
|
} |
|
|
|
while (dev) { |
|
int rc; |
|
|
|
rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); |
|
if (rc < 0) |
|
break; |
|
|
|
dev = nfc_device_iter_next(iter); |
|
} |
|
|
|
mutex_unlock(&nfc_devlist_mutex); |
|
|
|
cb->args[1] = (long) dev; |
|
|
|
return skb->len; |
|
} |
|
|
|
static int nfc_genl_dump_ses_done(struct netlink_callback *cb) |
|
{ |
|
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0]; |
|
|
|
nfc_device_iter_exit(iter); |
|
kfree(iter); |
|
|
|
return 0; |
|
} |
|
|
|
static int nfc_se_io(struct nfc_dev *dev, u32 se_idx, |
|
u8 *apdu, size_t apdu_length, |
|
se_io_cb_t cb, void *cb_context) |
|
{ |
|
struct nfc_se *se; |
|
int rc; |
|
|
|
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); |
|
|
|
device_lock(&dev->dev); |
|
|
|
if (!device_is_registered(&dev->dev)) { |
|
rc = -ENODEV; |
|
goto error; |
|
} |
|
|
|
if (!dev->dev_up) { |
|
rc = -ENODEV; |
|
goto error; |
|
} |
|
|
|
if (!dev->ops->se_io) { |
|
rc = -EOPNOTSUPP; |
|
goto error; |
|
} |
|
|
|
se = nfc_find_se(dev, se_idx); |
|
if (!se) { |
|
rc = -EINVAL; |
|
goto error; |
|
} |
|
|
|
if (se->state != NFC_SE_ENABLED) { |
|
rc = -ENODEV; |
|
goto error; |
|
} |
|
|
|
rc = dev->ops->se_io(dev, se_idx, apdu, |
|
apdu_length, cb, cb_context); |
|
|
|
error: |
|
device_unlock(&dev->dev); |
|
return rc; |
|
} |
|
|
|
struct se_io_ctx { |
|
u32 dev_idx; |
|
u32 se_idx; |
|
}; |
|
|
|
static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err) |
|
{ |
|
struct se_io_ctx *ctx = context; |
|
struct sk_buff *msg; |
|
void *hdr; |
|
|
|
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
|
if (!msg) { |
|
kfree(ctx); |
|
return; |
|
} |
|
|
|
hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
|
NFC_CMD_SE_IO); |
|
if (!hdr) |
|
goto free_msg; |
|
|
|
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) || |
|
nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) || |
|
nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu)) |
|
goto nla_put_failure; |
|
|
|
genlmsg_end(msg, hdr); |
|
|
|
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); |
|
|
|
kfree(ctx); |
|
|
|
return; |
|
|
|
nla_put_failure: |
|
free_msg: |
|
nlmsg_free(msg); |
|
kfree(ctx); |
|
|
|
return; |
|
} |
|
|
|
static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
struct se_io_ctx *ctx; |
|
u32 dev_idx, se_idx; |
|
u8 *apdu; |
|
size_t apdu_len; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_SE_INDEX] || |
|
!info->attrs[NFC_ATTR_SE_APDU]) |
|
return -EINVAL; |
|
|
|
dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]); |
|
|
|
dev = nfc_get_device(dev_idx); |
|
if (!dev) |
|
return -ENODEV; |
|
|
|
if (!dev->ops || !dev->ops->se_io) |
|
return -ENOTSUPP; |
|
|
|
apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); |
|
if (apdu_len == 0) |
|
return -EINVAL; |
|
|
|
apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); |
|
if (!apdu) |
|
return -EINVAL; |
|
|
|
ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); |
|
if (!ctx) |
|
return -ENOMEM; |
|
|
|
ctx->dev_idx = dev_idx; |
|
ctx->se_idx = se_idx; |
|
|
|
return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); |
|
} |
|
|
|
static int nfc_genl_vendor_cmd(struct sk_buff *skb, |
|
struct genl_info *info) |
|
{ |
|
struct nfc_dev *dev; |
|
const struct nfc_vendor_cmd *cmd; |
|
u32 dev_idx, vid, subcmd; |
|
u8 *data; |
|
size_t data_len; |
|
int i, err; |
|
|
|
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || |
|
!info->attrs[NFC_ATTR_VENDOR_ID] || |
|
!info->attrs[NFC_ATTR_VENDOR_SUBCMD]) |
|
return -EINVAL; |
|
|
|
dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
|
vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]); |
|
subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]); |
|
|
|
dev = nfc_get_device(dev_idx); |
|
if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds) |
|
return -ENODEV; |
|
|
|
if (info->attrs[NFC_ATTR_VENDOR_DATA]) { |
|
data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]); |
|
data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]); |
|
if (data_len == 0) |
|
return -EINVAL; |
|
} else { |
|
data = NULL; |
|
data_len = 0; |
|
} |
|
|
|
for (i = 0; i < dev->n_vendor_cmds; i++) { |
|
cmd = &dev->vendor_cmds[i]; |
|
|
|
if (cmd->vendor_id != vid || cmd->subcmd != subcmd) |
|
continue; |
|
|
|
dev->cur_cmd_info = info; |
|
err = cmd->doit(dev, data, data_len); |
|
dev->cur_cmd_info = NULL; |
|
return err; |
|
} |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
/* message building helper */ |
|
static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq, |
|
int flags, u8 cmd) |
|
{ |
|
/* since there is no private header just add the generic one */ |
|
return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd); |
|
} |
|
|
|
static struct sk_buff * |
|
__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen, |
|
u32 portid, u32 seq, |
|
enum nfc_attrs attr, |
|
u32 oui, u32 subcmd, gfp_t gfp) |
|
{ |
|
struct sk_buff *skb; |
|
void *hdr; |
|
|
|
skb = nlmsg_new(approxlen + 100, gfp); |
|
if (!skb) |
|
return NULL; |
|
|
|
hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR); |
|
if (!hdr) { |
|
kfree_skb(skb); |
|
return NULL; |
|
} |
|
|
|
if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
|
goto nla_put_failure; |
|
if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui)) |
|
goto nla_put_failure; |
|
if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd)) |
|
goto nla_put_failure; |
|
|
|
((void **)skb->cb)[0] = dev; |
|
((void **)skb->cb)[1] = hdr; |
|
|
|
return skb; |
|
|
|
nla_put_failure: |
|
kfree_skb(skb); |
|
return NULL; |
|
} |
|
|
|
struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev, |
|
enum nfc_attrs attr, |
|
u32 oui, u32 subcmd, |
|
int approxlen) |
|
{ |
|
if (WARN_ON(!dev->cur_cmd_info)) |
|
return NULL; |
|
|
|
return __nfc_alloc_vendor_cmd_skb(dev, approxlen, |
|
dev->cur_cmd_info->snd_portid, |
|
dev->cur_cmd_info->snd_seq, attr, |
|
oui, subcmd, GFP_KERNEL); |
|
} |
|
EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb); |
|
|
|
int nfc_vendor_cmd_reply(struct sk_buff *skb) |
|
{ |
|
struct nfc_dev *dev = ((void **)skb->cb)[0]; |
|
void *hdr = ((void **)skb->cb)[1]; |
|
|
|
/* clear CB data for netlink core to own from now on */ |
|
memset(skb->cb, 0, sizeof(skb->cb)); |
|
|
|
if (WARN_ON(!dev->cur_cmd_info)) { |
|
kfree_skb(skb); |
|
return -EINVAL; |
|
} |
|
|
|
genlmsg_end(skb, hdr); |
|
return genlmsg_reply(skb, dev->cur_cmd_info); |
|
} |
|
EXPORT_SYMBOL(nfc_vendor_cmd_reply); |
|
|
|
static const struct genl_ops nfc_genl_ops[] = { |
|
{ |
|
.cmd = NFC_CMD_GET_DEVICE, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_get_device, |
|
.dumpit = nfc_genl_dump_devices, |
|
.done = nfc_genl_dump_devices_done, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DEV_UP, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_dev_up, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DEV_DOWN, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_dev_down, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_START_POLL, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_start_poll, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_STOP_POLL, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_stop_poll, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DEP_LINK_UP, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_dep_link_up, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DEP_LINK_DOWN, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_dep_link_down, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_GET_TARGET, |
|
.validate = GENL_DONT_VALIDATE_STRICT | |
|
GENL_DONT_VALIDATE_DUMP_STRICT, |
|
.dumpit = nfc_genl_dump_targets, |
|
.done = nfc_genl_dump_targets_done, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_LLC_GET_PARAMS, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_llc_get_params, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_LLC_SET_PARAMS, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_llc_set_params, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_LLC_SDREQ, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_llc_sdreq, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_FW_DOWNLOAD, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_fw_download, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_ENABLE_SE, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_enable_se, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DISABLE_SE, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_disable_se, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_GET_SE, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.dumpit = nfc_genl_dump_ses, |
|
.done = nfc_genl_dump_ses_done, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_SE_IO, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_se_io, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_ACTIVATE_TARGET, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_activate_target, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_VENDOR, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_vendor_cmd, |
|
}, |
|
{ |
|
.cmd = NFC_CMD_DEACTIVATE_TARGET, |
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
|
.doit = nfc_genl_deactivate_target, |
|
}, |
|
}; |
|
|
|
static struct genl_family nfc_genl_family __ro_after_init = { |
|
.hdrsize = 0, |
|
.name = NFC_GENL_NAME, |
|
.version = NFC_GENL_VERSION, |
|
.maxattr = NFC_ATTR_MAX, |
|
.policy = nfc_genl_policy, |
|
.module = THIS_MODULE, |
|
.ops = nfc_genl_ops, |
|
.n_ops = ARRAY_SIZE(nfc_genl_ops), |
|
.mcgrps = nfc_genl_mcgrps, |
|
.n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps), |
|
}; |
|
|
|
|
|
struct urelease_work { |
|
struct work_struct w; |
|
u32 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(&w->w, nfc_urelease_event_work); |
|
w->portid = n->portid; |
|
schedule_work(&w->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(&nfc_genl_family); |
|
if (rc) |
|
return rc; |
|
|
|
netlink_register_notifier(&nl_notifier); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* 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); |
|
}
|
|
|