| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) 2011 Instituto Nokia de Tecnologia |
| * |
| * Authors: |
| * Lauro Ramos Venancio <lauro.venancio@openbossa.org> |
| * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> |
| * |
| * Vendor commands implementation based on net/wireless/nl80211.c |
| * which is: |
| * |
| * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
| * Copyright 2013-2014 Intel Mobile Communications GmbH |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
| |
| #include <net/genetlink.h> |
| #include <linux/nfc.h> |
| #include <linux/slab.h> |
| |
| #include "nfc.h" |
| #include "llcp.h" |
| |
| static const struct genl_multicast_group nfc_genl_mcgrps[] = { |
| { .name = NFC_GENL_MCAST_EVENT_NAME, }, |
| }; |
| |
| static struct genl_family nfc_genl_family; |
| static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { |
| [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 }, |
| [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, |
| .len = NFC_DEVICE_NAME_MAXSIZE }, |
| [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, |
| [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 }, |
| [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, |
| [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, |
| [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, |
| [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, |
| [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, |
| [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 }, |
| [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 }, |
| [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 }, |
| [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED }, |
| [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING, |
| .len = NFC_FIRMWARE_NAME_MAXSIZE }, |
| [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 }, |
| [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY }, |
| [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 }, |
| [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 }, |
| [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY }, |
| |
| }; |
| |
| static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = { |
| [NFC_SDP_ATTR_URI] = { .type = NLA_STRING, |
| .len = U8_MAX - 4 }, |
| [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 }, |
| }; |
| |
| static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, |
| struct netlink_callback *cb, int flags) |
| { |
| void *hdr; |
| |
| hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| &nfc_genl_family, flags, NFC_CMD_GET_TARGET); |
| if (!hdr) |
| return -EMSGSIZE; |
| |
| genl_dump_check_consistent(cb, hdr); |
| |
| if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) || |
| nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) || |
| nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) || |
| nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res)) |
| goto nla_put_failure; |
| if (target->nfcid1_len > 0 && |
| nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len, |
| target->nfcid1)) |
| goto nla_put_failure; |
| if (target->sensb_res_len > 0 && |
| nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len, |
| target->sensb_res)) |
| goto nla_put_failure; |
| if (target->sensf_res_len > 0 && |
| nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len, |
| target->sensf_res)) |
| goto nla_put_failure; |
| |
| if (target->is_iso15693) { |
| if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID, |
| target->iso15693_dsfid) || |
| nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID, |
| sizeof(target->iso15693_uid), target->iso15693_uid)) |
| goto nla_put_failure; |
| } |
| |
| genlmsg_end(msg, hdr); |
| return 0; |
| |
| nla_put_failure: |
| genlmsg_cancel(msg, hdr); |
| return -EMSGSIZE; |
| } |
| |
| static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb) |
| { |
| const struct genl_dumpit_info *info = genl_dumpit_info(cb); |
| struct nfc_dev *dev; |
| u32 idx; |
| |
| if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) |
| return ERR_PTR(-EINVAL); |
| |
| idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |
| |
| dev = nfc_get_device(idx); |
| if (!dev) |
| return ERR_PTR(-ENODEV); |
| |
| return dev; |
| } |
| |
| static int nfc_genl_dump_targets(struct sk_buff *skb, |
| struct netlink_callback *cb) |
| { |
| int i = cb->args[0]; |
| struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
| int rc; |
| |
| if (!dev) { |
| dev = __get_device_from_cb(cb); |
| if (IS_ERR(dev)) |
| return PTR_ERR(dev); |
| |
| cb->args[1] = (long) dev; |
| } |
| |
| device_lock(&dev->dev); |
| |
| cb->seq = dev->targets_generation; |
| |
| while (i < dev->n_targets) { |
| rc = nfc_genl_send_target(skb, &dev->targets[i], cb, |
| NLM_F_MULTI); |
| if (rc < 0) |
| break; |
| |
| i++; |
| } |
| |
| device_unlock(&dev->dev); |
| |
| cb->args[0] = i; |
| |
| return skb->len; |
| } |
| |
| static int nfc_genl_dump_targets_done(struct netlink_callback *cb) |
| { |
| struct nfc_dev *dev = (struct nfc_dev *) cb->args[1]; |
| |
| if (dev) |
| nfc_put_device(dev); |
| |
| return 0; |
| } |
| |
| int nfc_genl_targets_found(struct nfc_dev *dev) |
| { |
| struct sk_buff *msg; |
| void *hdr; |
| |
| dev->genl_data.poll_req_portid = 0; |
| |
| msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| if (!msg) |
| return -ENOMEM; |
| |
| hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
| NFC_EVENT_TARGETS_FOUND); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
| goto nla_put_failure; |
| |
| genlmsg_end(msg, hdr); |
| |
| return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
| |
| nla_put_failure: |
| free_msg: |
| nlmsg_free(msg); |
| return -EMSGSIZE; |
| } |
| |
| int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) |
| { |
| 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_TARGET_LOST); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
| nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_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_tm_activated(struct nfc_dev *dev, u32 protocol) |
| { |
| 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_TM_ACTIVATED); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
| goto nla_put_failure; |
| if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) |
| 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_tm_deactivated(struct nfc_dev *dev) |
| { |
| 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_TM_DEACTIVATED); |
| 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_KERNEL); |
| |
| return 0; |
| |
| nla_put_failure: |
| free_msg: |
| nlmsg_free(msg); |
| return -EMSGSIZE; |
| } |
| |
| static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg) |
| { |
| if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) || |
| nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
| nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) || |
| nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) || |
| nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode)) |
| return -1; |
| return 0; |
| } |
| |
| int nfc_genl_device_added(struct nfc_dev *dev) |
| { |
| 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_DEVICE_ADDED); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nfc_genl_setup_device_added(dev, msg)) |
| 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_device_removed(struct nfc_dev *dev) |
| { |
| 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_DEVICE_REMOVED); |
| 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_KERNEL); |
| |
| return 0; |
| |
| nla_put_failure: |
| free_msg: |
| nlmsg_free(msg); |
| return -EMSGSIZE; |
| } |
| |
| int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list) |
| { |
| struct sk_buff *msg; |
| struct nlattr *sdp_attr, *uri_attr; |
| struct nfc_llcp_sdp_tlv *sdres; |
| struct hlist_node *n; |
| void *hdr; |
| int rc = -EMSGSIZE; |
| int i; |
| |
| msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| if (!msg) |
| return -ENOMEM; |
| |
| hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, |
| NFC_EVENT_LLC_SDRES); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) |
| goto nla_put_failure; |
| |
| sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP); |
| if (sdp_attr == NULL) { |
| rc = -ENOMEM; |
| goto nla_put_failure; |
| } |
| |
| i = 1; |
| hlist_for_each_entry_safe(sdres, n, sdres_list, node) { |
| pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap); |
| |
| uri_attr = nla_nest_start_noflag(msg, i++); |
| if (uri_attr == NULL) { |
| rc = -ENOMEM; |
| goto nla_put_failure; |
| } |
| |
| if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap)) |
| goto nla_put_failure; |
| |
| if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri)) |
| goto nla_put_failure; |
| |
| nla_nest_end(msg, uri_attr); |
| |
| hlist_del(&sdres->node); |
| |
| nfc_llcp_free_sdp_tlv(sdres); |
| } |
| |
| nla_nest_end(msg, sdp_attr); |
| |
| genlmsg_end(msg, hdr); |
| |
| return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC); |
| |
| nla_put_failure: |
| free_msg: |
| nlmsg_free(msg); |
| |
| nfc_llcp_free_sdp_tlv_list(sdres_list); |
| |
| return rc; |
| } |
| |
| int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type) |
| { |
| 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_ADDED); |
| if (!hdr) |
| 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, 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; |
| } |
| |
| int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx) |
| { |
| 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_REMOVED); |
| if (!hdr) |
| goto free_msg; |
| |
| if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || |
| 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; |
| |
| 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]; |
| |
| if (iter) { |
| 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_ATOMIC); |
| 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_ATOMIC); |
| |
| 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]; |
| |
| if (iter) { |
| 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; |
| int rc; |
| |
| 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) { |
| rc = -EOPNOTSUPP; |
| goto put_dev; |
| } |
| |
| apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]); |
| if (apdu_len == 0) { |
| rc = -EINVAL; |
| goto put_dev; |
| } |
| |
| apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]); |
| if (!apdu) { |
| rc = -EINVAL; |
| goto put_dev; |
| } |
| |
| ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL); |
| if (!ctx) { |
| rc = -ENOMEM; |
| goto put_dev; |
| } |
| |
| ctx->dev_idx = dev_idx; |
| ctx->se_idx = se_idx; |
| |
| rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx); |
| |
| put_dev: |
| nfc_put_device(dev); |
| return rc; |
| } |
| |
| 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) |
| return -ENODEV; |
| |
| if (!dev->vendor_cmds || !dev->n_vendor_cmds) { |
| err = -ENODEV; |
| goto put_dev; |
| } |
| |
| 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) { |
| err = -EINVAL; |
| goto put_dev; |
| } |
| } 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; |
| goto put_dev; |
| } |
| |
| err = -EOPNOTSUPP; |
| |
| put_dev: |
| nfc_put_device(dev); |
| return err; |
| } |
| |
| /* 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, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_DEV_DOWN, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_dev_down, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_START_POLL, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_start_poll, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_STOP_POLL, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_stop_poll, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_DEP_LINK_UP, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_dep_link_up, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_DEP_LINK_DOWN, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_dep_link_down, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .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, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_LLC_SDREQ, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_llc_sdreq, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_FW_DOWNLOAD, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_fw_download, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_ENABLE_SE, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_enable_se, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_DISABLE_SE, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_disable_se, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .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, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_ACTIVATE_TARGET, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_activate_target, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_VENDOR, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_vendor_cmd, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| { |
| .cmd = NFC_CMD_DEACTIVATE_TARGET, |
| .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
| .doit = nfc_genl_deactivate_target, |
| .flags = GENL_ADMIN_PERM, |
| }, |
| }; |
| |
| 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), |
| .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1, |
| .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); |
| } |