diff options
Diffstat (limited to 'net/nfc/netlink.c')
| -rw-r--r-- | net/nfc/netlink.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 1d76d38c4a24..43a1c47756a7 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -46,6 +46,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING, .len = NFC_DEVICE_NAME_MAXSIZE }, [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 }, + [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, + [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, }; static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, @@ -311,6 +313,75 @@ static int nfc_genl_dump_devices_done(struct netlink_callback *cb) 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_GOODSIZE, 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; + + NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); + if (rf_mode == NFC_RF_INITIATOR) + NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target_idx); + NLA_PUT_U8(msg, NFC_ATTR_COMM_MODE, comm_mode); + NLA_PUT_U8(msg, NFC_ATTR_RF_MODE, rf_mode); + + genlmsg_end(msg, hdr); + + dev->dep_link_up = true; + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +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_GOODSIZE, 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; + + NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx); + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +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; @@ -398,6 +469,8 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) u32 idx; u32 protocols; + pr_debug("Poll start\n"); + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_PROTOCOLS]) return -EINVAL; @@ -452,6 +525,67 @@ out: 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, rf; + + pr_debug("DEP link up\n"); + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_COMM_MODE] || + !info->attrs[NFC_ATTR_RF_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]); + rf = nla_get_u8(info->attrs[NFC_ATTR_RF_MODE]); + + if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE) + return -EINVAL; + + if (rf != NFC_RF_INITIATOR && comm != NFC_RF_TARGET) + return -EINVAL; + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_dep_link_up(dev, tgt_idx, comm, rf); + + nfc_put_device(dev); + + return rc; +} + +static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) +{ + struct nfc_dev *dev; + int rc; + u32 idx; + + if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + return -EINVAL; + + idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); + + dev = nfc_get_device(idx); + if (!dev) + return -ENODEV; + + rc = nfc_dep_link_down(dev); + + nfc_put_device(dev); + return rc; +} + static struct genl_ops nfc_genl_ops[] = { { .cmd = NFC_CMD_GET_DEVICE, @@ -481,6 +615,16 @@ static struct genl_ops nfc_genl_ops[] = { .policy = nfc_genl_policy, }, { + .cmd = NFC_CMD_DEP_LINK_UP, + .doit = nfc_genl_dep_link_up, + .policy = nfc_genl_policy, + }, + { + .cmd = NFC_CMD_DEP_LINK_DOWN, + .doit = nfc_genl_dep_link_down, + .policy = nfc_genl_policy, + }, + { .cmd = NFC_CMD_GET_TARGET, .dumpit = nfc_genl_dump_targets, .done = nfc_genl_dump_targets_done, |