NFC: Add a target lost netlink event
Some chips are capable of detecting when a tag is out of the field, so they could send a netlink event about it to userspace. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -70,6 +70,7 @@ enum nfc_commands {
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NFC_EVENT_TARGETS_FOUND,
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NFC_EVENT_TARGETS_FOUND,
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NFC_EVENT_DEVICE_ADDED,
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NFC_EVENT_DEVICE_ADDED,
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NFC_EVENT_DEVICE_REMOVED,
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NFC_EVENT_DEVICE_REMOVED,
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NFC_EVENT_TARGET_LOST,
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/* private: internal use only */
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/* private: internal use only */
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__NFC_CMD_AFTER_LAST
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__NFC_CMD_AFTER_LAST
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};
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};
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@ -183,6 +183,36 @@ free_msg:
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return -EMSGSIZE;
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return -EMSGSIZE;
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}
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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_GOODSIZE, 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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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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genlmsg_end(msg, hdr);
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genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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free_msg:
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nlmsg_free(msg);
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return -EMSGSIZE;
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}
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int nfc_genl_device_added(struct nfc_dev *dev)
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int nfc_genl_device_added(struct nfc_dev *dev)
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{
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{
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struct sk_buff *msg;
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struct sk_buff *msg;
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@ -119,6 +119,7 @@ void nfc_genl_data_init(struct nfc_genl_data *genl_data);
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void nfc_genl_data_exit(struct nfc_genl_data *genl_data);
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void nfc_genl_data_exit(struct nfc_genl_data *genl_data);
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int nfc_genl_targets_found(struct nfc_dev *dev);
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int nfc_genl_targets_found(struct nfc_dev *dev);
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int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx);
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int nfc_genl_device_added(struct nfc_dev *dev);
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int nfc_genl_device_added(struct nfc_dev *dev);
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int nfc_genl_device_removed(struct nfc_dev *dev);
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int nfc_genl_device_removed(struct nfc_dev *dev);
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