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-rw-r--r--net/nfc/netlink.c1916
1 files changed, 1916 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
new file mode 100644
index 000000000..1c5b3ce1e
--- /dev/null
+++ b/net/nfc/netlink.c
@@ -0,0 +1,1916 @@
+// 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)
+{
+ 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 put_local;
+ }
+
+ rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
+
+put_local:
+ nfc_llcp_local_put(local);
+
+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 put_local;
+ }
+
+ 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);
+
+put_local:
+ nfc_llcp_local_put(local);
+
+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 put_local;
+ }
+
+ 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 put_local;
+ }
+
+ tlvs_len += sdreq->tlv_len;
+
+ hlist_add_head(&sdreq->node, &sdreq_list);
+ }
+
+ if (hlist_empty(&sdreq_list)) {
+ rc = -EINVAL;
+ goto put_local;
+ }
+
+ rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
+
+put_local:
+ nfc_llcp_local_put(local);
+
+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_strlcpy(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);
+
+ device_unlock(&dev->dev);
+ return rc;
+
+error:
+ device_unlock(&dev->dev);
+ kfree(cb_context);
+ 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;
+ 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,
+ },
+ {
+ .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((struct work_struct *) w, nfc_urelease_event_work);
+ w->portid = n->portid;
+ schedule_work((struct work_struct *) w);
+ }
+
+out:
+ return NOTIFY_DONE;
+}
+
+void nfc_genl_data_init(struct nfc_genl_data *genl_data)
+{
+ genl_data->poll_req_portid = 0;
+ mutex_init(&genl_data->genl_data_mutex);
+}
+
+void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
+{
+ mutex_destroy(&genl_data->genl_data_mutex);
+}
+
+static struct notifier_block nl_notifier = {
+ .notifier_call = nfc_genl_rcv_nl_event,
+};
+
+/**
+ * nfc_genl_init() - Initialize netlink interface
+ *
+ * This initialization function registers the nfc netlink family.
+ */
+int __init nfc_genl_init(void)
+{
+ int rc;
+
+ rc = genl_register_family(&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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 09:33:54 +0000